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Table Mountain National Park Marine Protected Area

The Table Mountain National Park Marine Protected Area is an inshore marine protected area around the Cape Peninsula, in the vicinity of Cape Town, South Africa. It was proclaimed in Government Gazette No. 26431 of 4 June 2004 in terms of the Marine Living Resources Act, 18 of 1998.[1]

Table Mountain National Park Marine Protected Area
IUCN category IV (habitat/species management area)
Table Mountain National Park Marine Protected Area location
LocationCoastal, Western Cape, South Africa
Nearest cityCape Town
Coordinates34°00′S 18°20′E / 34.000°S 18.333°E / -34.000; 18.333Coordinates: 34°00′S 18°20′E / 34.000°S 18.333°E / -34.000; 18.333
Area953.25 km2 (368.05 sq mi)
EstablishedProclaimed under the MLRA in 2004
Governing bodySANParks
World Heritage siteCape Floral Region (terrestrial)
Table Mountain National Park Marine Protected Area (South Africa)

The MPA is of value for conservation of a wide range of endemic species, and has considerable economic value as a tourist destination. It encloses a large number of recreational dive sites visited by local residents and tourists from further afield. The shark and whale watching tourist industries are also represented, and there are several popular surf breaks. The MPA is mainly a controlled zone where extractive activities are allowed under permit, with six small no-take zones. The MPA is administrated by the Table Mountain National Park, a branch of SANParks.

The marine ecology is unusually varied for an area of this size, as a result of the meeting of two major oceanic water masses near Cape Point, and the park extends into two coastal marine bioregions. The ecology of the west or "Atlantic Seaboard" side of the park is noticeably different in character and biodiversity to that of the east, or "False Bay" side. Both sides are classified as temperate waters, but there is a significant difference in average temperature, with the Atlantic side being noticeably colder on average.[2]

The MPA contains culturally significant fish traps, historical wrecks and traditional fishing communities, and is also important for commercial fisheries. Part of the West Coast rock lobster industry takes place within the MPA – as well as recreational and subsistence fishers, and an illegal poaching industry mostly targeting abalone, rock lobster and territorial linefish from the no-take zones.[2]

History

The MPA was proclaimed by the Minister of Environmental Affairs and Tourism, Marthinus van Schalkwyk, in Government Gazette No. 26431 of 4 June 2004 in terms of the Marine Natural Resources Act, 18 of 1998.[1]

The Table Mountain National Park was originally established as the Cape of Good Hope Nature Reserve in 1939. The mountain above the 152 metre contour was proclaimed a national monument in 1958. The reserve was later expanded and in 1998 the Cape Peninsula National Park was proclaimed. In 2004 it was renamed as the Table Mountain National Park, and the Marine protected area added.[3]

The Castle Rock Marine Protected Area, previously known as the Millers Point Marine Reserve, was proclaimed as a marine protected area in Government Notice R1429 in Government Gazette 21948 of 29 December 2000.[4]

Purpose

A marine protected area is defined by the IUCN as "A clearly defined geographical space, recognised, dedicated and managed, through legal or other effective means, to achieve the long-term conservation of nature with associated ecosystem services and cultural values".[5]

This MPA is specifically intended to protect the marine environment and biodiversity of the region, to promote sustainable use of marine resources in the MPA, to allow over-exploited species of fish, abalone and rock lobster a sanctuary in which to breed and recover, to develop awareness of the MPA among recreational users, and to promote and regulate eco-tourism and scientific research.[6][1]

Waters from the cold Benguela current and warm Agulhas currents meet and mix in the vicinity of the Cape Peninsula, resulting in a region of high marine biodiversity. The TMNPMPA is intended to protect this region to help sustainable commercial and recreational use of the coastal waters.[7]

The six smaller restricted or "no-take" zones are thought to be breeding and nursery areas for marine life and the hope is that by leaving these relatively undisturbed, threatened species will have a chance to regenerate and increase the stock in adjacent areas.[7]

Extent

The MPA extends from Mouille Point in the north west, south along the west coast of the peninsula, around Cape Point, and north along the east coast of the peninsula to Muizenberg in the north east, with a total length of 127 km (79 mi)[2] of coastline and area of 953.25 km2 (368.05 sq mi).[7]

There are three 3 harbours within the MPA, the naval base and yacht club marina at Simon's Town, Kalk Bay fishing harbour, and Hout Bay fishing harbour and marina. There are also small craft launching sites at Witsands, Kommetjie (no slipway), Millers Point, Simon's Town, Buffels Bay and just outside the MPA at Granger Bay. The major international port at Cape Town is also just outside the MPA.[2]

There are six restricted zones, in which no fishing or extractive activities are allowed, excepting that in the Karbonkelberg restricted area, fishing for snoek (Thyrsites atun) is allowed beyond the 35 m isobath. The combined area of the no-take zones is 56.4 km2 (21.8 sq mi).[7]

Zonation

A Restricted Area is a part of a marine protected area also known as a "No-Take" area, in which all extraction and harvesting of marine plant and animal life is prohibited. There are six of these within the TMNPMPA.[5]

The remainder of the MPA is designated as a Controlled Area, where extraction and harvesting of marine life and other activities, are allowed on condition that one has a valid permit allowing one or more of the following specific activities: spear fishing, angling, scuba diving, snorkelling for mollusc extraction, boating, commercial diving, salvage operations, scientific research, commercial fishing, whale watching, shark cage diving or filming.[5]

Boundaries

The Table Mountain National Park Marine Protected Area includes the seabed, the water, and the airspace above it to an altitude of 1000 metres above sea level. The lateral boundaries of the controlled area on WGS84 are offshore of the high-water mark between Green Point at S33°54.075'; E018°24.037' and Bailey's Cottage, Muizenberg at S34°06.590'; E018°28.250', to a line drawn east (090°T) from the beacon at Bailey's Cottage to S34°06.590'; E018°33.413, south (180°T) to S34°24.444; E018°33.413, west (270°T) to S34°24.444; E018°15.000', north (000°T) to S33°54.075; E018°15.000, and east (090°T) to Green Point at S33°54.075'; E018°24.037'.[1]

Restricted areas

  • Karbonkelberg Restricted zone
    Offshore from the high-water mark between Oudekraal at S33°58.757'; E018°21.847' and Hout Bay at S34°03.660'; E018°20.252', west (270°T) from Hout Bay to S34°03.660'; E018°17.797', north (000°T) to S33°58.757'; E018°17.797'; and east (090°T) to Oudekraal at S33°58.757'; E018°21.847'.[1]
  • Cape of Good Hope Restricted zone
    Offshore from the high-water mark between Hoek van die Bobbejaan at S34°18.393'; E018°24.258' and Schusters Bay Point, Scarborough, at position S34°12.271'; E018°22.194', south (180°T) from Schuster's Bay point to S34°16.490'; E018°22.194, to S34°18.393'; E018°23.500' and east (090°T) from position S34°18'.393S; E018°23'.500E to Hoek van die Bobbejaan at S34°18.393'; E018°24.258'.[1]
  • Paulsberg Restricted zone
    Offshore from the high-water mark between Venus Pool at S34°17.744'; E018°28.020', and Smitswinkel Point at S34°16.549'; E018°28.464', east (090°T) from Smitswinkel Point to S34°16.549'; E018°29.000', south (180°T) to S34°17.744'; E018°29.000', and west (270°T) to Venus Pool at S34°17.744'; E018°28.020'.[1]
  • Castle Rock Restricted zone
    Offshore from the high-water mark between Partridge Point at S34°15.480'; E018°28.344', and Millers Point at S34°14.100'; E018°28.508', east (090°T) from Millers Point to S34°14.100'; E018°29.300', south (180°T) to S34°15.480'; E018°29.300', and west (270°T) to Partridge Point at S34°15.480'; E018°28.344'.
  • Boulders Restricted zone
    Offshore from the high-water mark between Rocklands, at S34°12.705'; E018°27.781', and Seaforth, Simonstown at S34°11.567'; E018°26.762', to S34°10.581'; E018°27.196'; east (090°T) to S34°10.581'; E018°27.781', and south (180°T) to Rocklands at S34°12.705'; E018°27.781'.
  • St James Restricted zone
    Offshore from the high-water mark between the Kalk Bay Tidal Pool at S34°07.567'; E018°27.050' and the St James Tidal Pool at S34°07.123'; E018°27.568 south (180°T) from the St. James Tidal Pool to S34°07.567'; E018°27.568; and east (090°T) to the Kalk Bay Tidal Pool at S34°07.567; E018°27.050.[1]

Management

The marine protected areas of South Africa are the responsibility of the Department of Environment, Forestry and Fisheries of the national government, which has management contracts with a variety of MPA management authorities, in this case, South African National Parks (SANParks), which manages the MPA with funding from the SA Government through the Department of Environment, Forestry and Fisheries which is responsible for issuing permits, quotas and law enforcement.[6]

The marine management objective of the TMNP is stated as "To safe-guard the sustainable use of marine resources within the Table Mountain Marine Protected Area (TMNP MPA)", and the Responsible tourism high level objective as "To develop, manage and enhance a range of responsible tourism attractions and products for visitors, recreational users and disadvantaged communities, to experience and appreciate the rich marine and terrestrial biodiversity and cultural history of the TMNP".[8]

There is an approved TMNP management plan for 2015–2025 but no specific management plan for the MPA. MPA management is included in strategic park management plans for all aspects of the park including the marine component.[6] The park officially has staff and resources dedicated to manage aspects of the MPA and cooperate with other marine law enforcement authorities, and recognises the importance of compliance monitoring in the management of abalone and West Coast Rock Lobster, which are found in the MPA.[8] Although there are multiple management programs in place, they are understaffed and not always effective in terms of monitoring the MPA. Poaching is still a major issue within the MPA that adequate management has failed to effectively address.[9] Other major risks to the MPA are assessed as over-utilisation of resources and pollution by city storm water outlets, sewage effluent dispersal systems and rivers,[8]

  • IUCN protected area category: IV[7] (Habitat/Species Management Area)
  • MPA id: 67704044[7]
  • Bathymetric survey at fine scale - Current project of the SA Council for Geoscience to map the bathymetry of False Bay at metre to decimetre resolution. Survey completed for Table Bay harbour approaches and the inshore waters of the MPA as far south as Hout Bay

Law enforcement

The MPA is managed by Table Mountain National Park in conjunction with the Department of Agriculture, Forestry and Fisheries. TMNP is responsible for the administration, inshore law enforcement and educational activities.[10]

Budget

A total of 3.6% of the TMNP operational budget for annual recurring activity is allocated to marine management from 2015 to 2020, comprising R3,440,000 for 2015/6, R3,646,000 for 2016/7, R3,865,000 for 2017/8, R4,097,000 for 2018/9 and R4,343,000 for 2019/2020.[8]

Use

 
Map showing the distribution of most of the wreck and reef dive sites of the Cape Town local area

There is a high level of tourism and recreational activity in the MPA due to the large local population and Cape Town and the Table Mountain National Park being notable international tourism destinations. Tourist attractions inside the MPA include scuba diving, boat-based whale and shark-watching, snorkelling with seals and high-speed scenic boat rides. Threatened and protected species supported within the MPA include white sharks, abalone, African penguins and several over-exploited line fish species, such as red steenbras. This MPA has some of the most intensively studied waters on South Africa due to the presence of universities, the natural history museum and several marine research institutes in and near Cape Town, so more is known about the local biodiversity than most other MPAs in South African waters[2]

Further use opportunities have been identified in education, monitoring and research, tourism and recreation development, and contributions to local economy through poverty alleviation and partnerships.[6]

Slipways and harbours in the MPA

  • Hout Bay Harbour and slipway: Commercial fishing harbour and yacht club marina with public access slipway, S34°03'01.76" E018°20'42.97"
  • Soetwater slipway: Public access slipway, S34°10.692' E018°20.684'
  • Kalk Bay harbour: Commercial fishing harbour.
  • False Bay Yacht Club: Member access marina and slipway, S34°11'32.57" E018°26'0.31"
  • Simon's Town naval base: Government access harbour and slipways.
  • Miller's Point slipway: Public access slipway, S34°13'49.63" E018°28'25.12"
  • Rumbly Bay slipway: Public access slipway on the south side of Millers Point.
  • Buffels Bay slipway: Public access slipway controlled by TMNP.

Activities requiring a permit

Fishing

Fishing is allowed in the controlled zone of the MPA subject to permits, regulations, catch limits and seasons set by the Department of Agriculture, Forestry and Fisheries. However, it remains a contentious issue in the area. Subsistence fishers are prohibited from fishing in no-take zones and do not have the boats or technology necessary to safely travel past the no-take zone. For places where they are allowed to fish, they often have to apply for expensive permits. In addition, for those subsistence fishers that are illiterate, they must hire a literate third-party to fill out the application for them. Finally, it is often difficult for these subsistence fishers to prove they have the start-up capital or private boat needed to obtain a permit.[11]

Tension commonly exists between subsistence fishers and commercial fishers who are allowed to harvest rock lobster to measure the ecological growth rate of the species. This opportunity is not offered to subsistence fishers because they do not have the necessary gear.[12]

Other activities requiring permits include recreational scuba diving.[1]

Scuba diving

Most of the recreational dive sites of Cape Town are in the Table Mountain National Park Marine Protected Area. A permit is required to scuba dive in any MPA in South Africa. These permits are valid for a year and are available at some branches of the Post Office.[1] Temporary permits, valid for a month, may be available at dive shops or from dive boat operators who operate in an MPA. A personal recreational scuba diving permit is valid in all South African MPAs where recreational diving is allowed. The business permit to operate recreational scuba business operations in an MPA is restricted to a specific MPA. Diving for commercial or scientific purposes is also subject to permit.

Named dive sites

The MPA has a large number of rocky reef and wreck recreational dive sites which have been identified by position and named. Many of these have been partly or completely surveyed mapped and described in the travel guide for diving the Cape Peninsula and False Bay on Wikivoyage.[13] Some of them are listed here for the west coast of the peninsula from north to south, and for the east coast, also from north to south, roughly following the coastline:

Atlantic seaboard:[14]

False Bay west:[14]

Experimental fisheries

An experimental octopus fishery was started in 2014 to gather data on octopus harvesting potential with a view to establishing a sustainable fishery and enhancing job creation and economic development in coastal areas. The deaths of whales trapped in octopus trap ropes led to protests and temporary suspension of the fishery pending scientific investigation of the experimental octopus fishery in False Bay in June 2019. Some of the fishing grounds involved are reefs in the controlled area of the MPA.[15]

New rules for the octopus fishery intended to reduce the risk of whale entrapment were published and the fishery reopened in November 2019.[16]

Prohibited activities

Fishing and spearfishing is prohibited in the restricted zones, except for fishing for snoek in the Karbonkelberg restricted zone in water more than 35 m deep.

Geography

 
Geological map of the Cape Peninsula and False Bay
 
Geological section of the Cape Peninsula and False Bay
 

General topography

The City of Cape Town was founded at the northern end of the Cape Peninsula, a narrow mountainous strip of land at the most 11 km wide and just over 50 km long. The northern border is the coast of Table Bay, a large open bay with a single island, Robben Island, in its mouth.

A ragged coastline marks the western border along the Atlantic Ocean. A number of small bays are found along the coast with a single large one, Hout Bay, about half way along. Further south the peninsula narrows until it comes to an end at Cape Point. A range of mountains with Table Mountain at 1,085m at the northern end forms the backbone of the peninsula. The highest point of the southern peninsula is Swartkop, at 678 m, near Simon's Town.

The eastern side is bordered by False Bay, and this stretch of coastline includes the smaller Smitswinkel Bay, Simon's Bay and Fish Hoek Bay. At Muizenberg the coastline becomes relatively low and sandy and curves east to Gordon's Bay to form the northern boundary of False Bay. From Gordon's Bay the coastline swings roughly south, and zig-zags its way along the foot of the Hottentot's Holland mountain range to Cape Hangklip which is at nearly the same latitude as Cape Point. The highest peak on this side is Kogelberg at 1,269 m.

In plan the bay is approximately square with rather wobbly edges, being roughly the same extent from north to south as east to west (30 km), with the entire southern side open to the ocean. The area of False Bay has been measured at about 1,090 km², and the volume is approximately 45 km3 (average depth about 40 m). The land perimeter has been measured at 116 km, from a 1:50,000 scale map.

Bottom morphology

The bottom morphology of False Bay is generally smooth and fairly shallow, sloping gently downwards from North to South, so that the depth at the centre of the mouth is about 80 m. The bottom is covered with sediment which ranges from very coarse to very fine, with most of the fine sediment and mud in the centre of the bay. The main exception is a long ridge of sedimentary rock that extends in a southward direction from off the Strand, to approximately level with the mouth of the Steenbras River. The southern tip of this ridge is known to recreational divers as Steenbras Deep.

There is one true island in the bay, Seal Island, a barren and stony outcrop of granite about 200 m long and with an area of about 2 hectare. It is about 6 km south of Strandfontein and is less than 10 m above sea level at its highest point. There are also a number of small rocky islets which extend above the high water mark, and other rocks and shoals which approach the surface. Most of these are granite of the Peninsula pluton, but east of Seal Island they are generally sandstone, either of the Table Mountain series, or the underlying Tygerberg formation. Outside the bay, but influencing the wave patterns in it, is Rocky Bank, an extensive area of sandstone reef between 20 and 30 m depth.

A large granite reef, Whittle Rock, lies on the eastern edge of the MPA about halfway between the north shore and the mouth of the bay.

Strictly speaking, False Bay is part of the Atlantic Ocean which extends as far east as Cape Agulhas, but when in Cape Town, Atlantic generally refers to the western seaboard of the Cape Peninsula, and the east side is referred to as False Bay, or the Simon's Town side.

Geology

 
The Cape Peninsula shoreline in the case of (left) a 25m higher sea level that occurred around 5 and 1.5 million years ago, and (right) a 125m lower sea level at the time of maximum ice build-up during cold periods – the most recent being 20 000 years ago (after John S. Compton 2004)

The Cape Peninsula is a peninsula that juts out into the Atlantic Ocean at the south-western extremity of the African continent. At its tip is the Cape of Good Hope. The peninsula forms the west side of False Bay. The three main rock formations are the late-Precambrian Malmesbury group (metamorphic rock), the Peninsula granite, a huge batholith that was intruded into the Malmesbury Group about 630 million years ago, and the Table Mountain group sandstones that were deposited on the eroded surface of granite and Malmesbury series basement about 450 million years ago. The sand, silt and mud deposits were lithified by pressure and then folded during the Cape Orogeny to form the Cape Fold Belt, which extends along the western and southern coasts.[17]

Almost 50% of the Cape Peninsula and Cape Flats area is covered by weakly cemented marine sands. Sea-levels fluctuated between −120 to +200m from present mean sea level during the Pliocene and subsequent Pleistocene ice-age between 2 million and 15000 years ago as a result of fluctuating global temperature and variable amounts of water accumulated in polar ice caps.[17] At times the sea covered the Cape Flats and Noordhoek valley and the Cape Peninsula was then a group of islands. Beach sands with shell fragments and estuarine muds were deposited and later overlain by calcrete-cemented dune sands as the sea retreated. "Dune rock" that was deposited during a Pleistocene interglacial period about 120,000 years ago is now being eroded in the sea-cliffs near Swartklip.[17] During glacial periods the sea level dropped to expose the bottom of False Bay to weathering and erosion. The last major regression, about 20,000 years ago, lowered the sea level to the present 130m isobath, which is south of Cape Point and Cape Hangklip, leaving the entire bottom of False Bay and a large part of the continental shelf to the west of the peninsula exposed. During this period an extensive system of dunes was formed on the sandy floor of False Bay.[17]

Over the last 2 million years of the Quaternary geological period, cool glacial periods (hypothermals) about 100,000 years long, have been the norm. Canada and northern Eurasia were covered by continental ice sheets kilometres thick, and the global effect was a lowering of sea level by some 130m because the sea was the source of the frozen water of these huge ice sheets. This means that False Bay and Table Bay were dry and covered by dunes for 90% of the last 2 million years. Warm interglacial periods (hyperthermals), have lasted only about 10 000 years and we are part way through the latest one which started about 6000 years ago. The coastline of False Bay, therefore, was usually across the mouth of the present False Bay. Robben Island was a hill on a coastal plain with the coast west of the island for most of the past 2 million years.[17] Sea level rises due to global warming may eventually increase this trend.

The large and small-scale relief of the coastal seabed is largely dependent on the local surface formation, where this is exposed above the generally sandy bottom. The granite areas are usually rounded corestone outcrops, influenced by the local jointing patterns, and can range between tall pinnacles, large low slab-like outcrops, and aggregations of boulders of a wide range of sizes. Usually a combination of these is present, often with sandy patches in local depressions, while the sedimentary facies present a more variable aspect, depending on the rock type, dip, strike, and thickness of the layers present. A very good estimate of underwater relief character can be made by observing the local topography above the water. An interesting local phenomenon is the contact zone between the intrusive granite of the Peninsula pluton and the older Malmesbury strata visible at the Sea Point shoreline.[17] The bottom off the west coast of the cape Peninsula between and beyond the rocky reef areas is largely fairly fine white quartzitic sand with some areas of coarser shelly sand. The bottom sediments of False Bay are more varied. On the west side of the bay there is a general tendency towards fine to medium quartzitic sand and coarser calcareous material, mostly mollusc shell fragments, with patches of a maerl of branching coralline algae fragments. There are also areas of very fine sand, almost mud, in the more sheltered Simon's Bay. Most of the intertidal zone of the peninsula is rocky shoreline, but there are several sandy beaches of varying extent.[18][19]

Hydrography

The Benguela current flows northward along the west coast, and Agulhas eddies move westwards along the south coast, bringing occasional warmer water into False Bay, along with drifting organisms from far upcurrent, which are often unsuited to the local conditions, and do not survive long. There are a few places in False Bay where they tend to end up. Currents in False Bay are generally weak, local, wind driven, shallow and not very predictable. Inshore currents in the MPA along the west coast also generally shallow and wind-driven.

Wind driven upwellings on the west coast are driven by strong south-easterly winds, which mostly blow in summer. Cold, clear, nutrient-rich water is drawn up from the deep to replace surface water driven offshore by Ekman transport, usually followed closely by algal blooms powered by the intense summer sunlight, which rapidly reduce water clarity and provide food for zooplankton. Lesser upwellings, also driven by south-easterly winds in summer, occur on the east side of False Bay near Cape Hangklip and Rooiels, where surface water temperatures can be 6 to 7 °C colder than the surrounding areas, and bottom temperatures below 12 °C.[20]: 10 

Water temperature varies with the seasons. In summer False Bay is thermally stratified, with a vertical temperature variation of 5 to 9˚C between the warmer surface water and cooler depths below 50 m, while in winter the water column is at nearly constant temperature at all depths. The development of a thermocline is strongest around late December and peaks in late summer to early autumn.[20]: 8 

The volume of fresh water runoff from rivers and stormwater drainage is low and mostly in late winter.

Bathymetry

 
False Bay Bathymetry from SA Council for Geoscience

The Bathymetry of False Bay differs in character from the west side of the Cape Peninsula. The west coast seabed tends to slope down more steeply than in False Bay, and although the close inshore waters are also shallow, the 100 m contour is mostly within about 10 km of the west coast, while the entire False Bay is shallower than about 80 m.[21] The bottom of the bay slopes down relatively gradually from the gently sloping beaches of the north shore to the mouth, and is fairly even in depth from east to west except close to the shorelines, with three major features disrupting this gentle slope. These are the granite outcrops of Seal island and Whittle Rock, and the hard sedimentary rock of the Steenbras ridge. Just outside the bay, there is a large shoal area at Rocky Bank, a relatively shallow area around Cape Pont, with two large pinnacles at Bellows Rock and Anvil Rock, and a long ridge extending south-west from Cape Hangklip, which channels cold, nutrient-rich water into the west side of the bay during upwelling events. Seal Island, Hangklip Ridge, Steenbras ridge and most of Whittle Rock are outside of the MPA.[22]

Tidal range is moderate, with about 2 m range at spring tide on both sides of the peninsula, and tidal currents are negligible.[21]

Climate of the Cape Peninsula

The climate of the South-western Cape is markedly different from the rest of South Africa, which is generally a summer rainfall region, receiving most of its rainfall during the summer months of December to February. The South-western Cape has a Mediterranean type climate, with most of its rainfall during the winter months from June to September.

The south westerly winds over the South Atlantic and Southern Ocean produce the prevailing south-westerly swell, which is strongest in the winter months, and which beats on the exposed Atlantic coastline and the east side of False Bay. The mountains of the Cape Peninsula provide protection on the east side of the peninsula from this wind and from the south westerly waves – a fact which influenced Governor Simon van der Stel in his choice of Simon's Bay as a winter anchorage for the Dutch East India Company’s ships for Cape Town.

Winter in the South-western Cape is strongly influenced by disturbances in the region between the circumpolar westerly winds and south-easterly trade winds, resulting in a series of eastward moving frontal depressions. These bring cool cloudy weather and rain on winds from the north west along the cold fronts which move in from the south west. The north westerly winter storms have wrecked many ships anchored in Table Bay over the centuries. Even today, in spite of technical advances and improved weather forecasting this still happens, though less frequently than in the past, and recently the salvage operations are more often successful. As the front passes, the wind shifts to south-westerly, and eventually south-easterly as the pressure rises, until the next front. The period between fronts tends to be in the order of a week, but can be highly variable.

During the summer the dominant factor determining the weather in the region is a high pressure zone, known as the South Atlantic High, located over the South Atlantic ocean to the west of the Cape coast. This high pressure zone moves seasonally, following the sun. The more southerly position of this high pressure zone in summer has the effect of blocking the cold fronts, and restricting them to pass mostly south of the continent. Winds circulating in an anticlockwise direction from such a system reach the Cape from the south-east, producing periods of up to several days of high winds and mostly clear skies. These south easterly winds are locally known as the Cape Doctor. They keep the region relatively cool and free of industrial pollutants. Because of the south facing aspect of False Bay, the west side of the bay is exposed to these winds, while Table Bay and the west coast of the peninsula experience an offshore wind. This wind pattern is locally influenced by the topography to the extent that gale-force winds may be blowing in one place, while a few kilometers away it may be almost calm.

Sea conditions

The waves reaching the shores of False Bay and the Cape Peninsula can be considered as a combination of local wind waves and swell from distant sources. The swell is produced by weather systems generally south of the continent, sometimes considerably distant, the most important of which are the frontal systems in the South Atlantic, which generate wind waves which then disperse away from their source and separate over time into zones of varying period. The long period waves are faster and have more energy, and move ahead of the shorter period components, so they tend to reach the coast first. This is known to surfers as a pulse, and is generally followed by gradually shortening period swell of less power.

Local winds will also produce waves which will combine their effects with the swell. Offshore winds as a general rule will flatten the sea as the fetch (distance that the wind has blown over the water) is too small to develop waves of great height or length. Onshore winds on the other hand, if strong enough will produce a short chop.

South-easterly winds which blow offshore and along the coast on the west side of the Cape Peninsula and the east side of False Bay cause a movement of surface water offshore to the west of the coast. This movement of water away from the coast is compensated by the upwelling of deeper water. The upwelled water is generally cold and relatively clear. However, as the upwelled water has a high nutrient content, the upwellings are often forerunners of a plankton bloom known as a "red tide", which will drastically reduce visibility.

The local tides are relatively weak, and there are no strong tidal currents on the Atlantic coast or in False Bay. Maximum tidal range at Cape Town is approximately 1.86 m (spring tides), and at Simon's Town 1.91 m, with minimum ranges at both places of about 0.26 m (neap tides).

Average summer surface temperature of the Atlantic off the Cape Peninsula is in the range 10° to 13 °C. The bottom temperature may be a few degrees colder. Minimum temperature is about 8 °C and maximum about 17 °C. Average winter surface temperature of the Atlantic off the Cape Peninsula is in the range 13° to 15 °C. The bottom temperature inshore is much the same. Average winter surface temperature of False Bay is approximately 15 °C, and the bottom temperature much the same. Average summer surface temperature of False Bay is approximately 19 °C. The bottom temperature is 1° to 3 °C lower than it is in winter, and a distinct thermocline will usually develop between December and about May.

A shallow surface current may be produced by strong winds. Tidal currents are negligible. Cape Point may have stronger currents, where eddies from the Agulhas current frequently produce a light- to medium-strength current.

Turbidity has a strong influence on the penetration of light to depth, including the wavelengths that penetrate, and long-term turbidity can affect the growth of seaweeds which depend on sufficient light for photosynthesis. The depth distribution of the various species found in the waters of the MPA vary depending on the general turbidity of the water of the specific area.

Seasonal variations in sea conditions

There is a significant seasonal variation in sea conditions in the MPA. In summer the South Atlantic High moves south over the ocean to the west of the Cape Peninsula and brings south-easterly winds to the Cape Peninsula. On the west side of the peninsula these winds blow along the coastline and offshore, causing an offshore movement of surface water by Ekman transport. The offshore flow is compensated by upwelling of bottom water, and as the continental shelf is narrow and relatively steeply sloped in this area, the upwelled water is generally cold, clear, and rich in nutrients. Surface temperatures can drop by a few degrees over a matter of hours. When this water is illuminated by summer sunshine, there is generally a phytoplanktonic algal bloom, which will produce a sudden increase in microscopic biomass in the surface layer, until the turbidity of the water restricts penetration of light to the deeper levels. Visibility in the surface water can drop almost as fast at it improved on a clear day, and can reduce from tens of metres to less than 5 m in a few hours. Deeper water may remain clear, but relatively dark. The south-east wind also causes upwellings on the east coast of False Bay near Hangklip, but the upwelled water is not usually as cold, has a lower nutrient load, and may be turbid, so the effect is generally less marked. Nevertheless, the effect can be impressive phytoplankton blooms, known as red tides. The water in False Bay is constrained from westward flow by the Cape Peninsula, so these red tides can be relatively persistent.[23] The south easterly wind can push up a very rough wind wave, but the fetch is short and it usually dies down quite quickly, but while it lasts it can clear a large amount of benthic fauna off the shallower reefs, which may take weeks or months to find its way back.

In winter, the South Atlantic High moves north and the weather pattern is dominated by cold fronts formed over the southern ocean, The winds generally follow the pattern of light to strong north-westerly, swinging though south-westerly as the front passes overhead, and followed by relatively weak south-easterlies. North-westerly gales produce powerful wind waves which batter the west coast of the peninsula, but the east side waters may be calm, with a minor wind chop due to the short fetch. The westerly winds may also clean up the surface waters of the west side of False Bay, and as there is usually much lower insolation at this time of year, plankton does not usually bloom, and the water remains relatively clear.[23]

The westerly storms of the southern ocean also produce very large waves with a large amount of their energy propagating towards the north-east, and as these move away from their source they separate by wave-length, as the wave velocity is a function of the wavelength, with the longer, more powerful waves travelling faster and losing less energy as they travel. These become swells, and by the time they reach the Cape Peninsula the leading pulse is usually in the 13 to 15 second period band, occasionally up to 18 seconds. Depending on deep-water amplitude, they can break over some of the reefs outside Hout Bay at heights of up to 70 feet (21 m), making this a world-class big wave break.[24][25] Most of the energy of swells with a significant westerly component does not make it round the corner of Cape Point into the west side of False Bay. On the same day that big waves are breaking on the west coast, it may be calm enough for scuba diving from the shore in Simon's Town, on the False Bay coast on the other side of the peninsula.

Ecology

 
Marine ecoregions of the South African Exclusive Economic Zone: Table Mountain National Park Marine Protected Area spans the boundary between the Benguela ecoregion and the Agulhas ecoregion.
 
Kelp forest on a high-profile inshore reef

Cape Point at the tip of the Cape Peninsula is considered the boundary between two of the four inshore marine ecoregions of South Africa. To the west of Cape Point is the cool to cold temperate Benguela ecoregion which extends from Cape Columbine to Cape Point, and is dominated by the cold Benguela Current, and the warm temperate Agulhas ecoregion to the east of Cape Point which extends eastwards to the Mbashe River. The Cape Point break is considered to be a relatively distinct change in the bioregions and this can be clearly seen from the difference in the ecologies between the Atlantic seaboard of the peninsula and False Bay, though there is a significant overlap of resident organisms. There are a large proportion of species endemic to South Africa along this coastline.[23][26][27]

Habitats

Four major habitats types exist in the sea in this region, distinguished by the nature of the substrate. The substrate, or base material, is important in that it provides a base to which an organism can anchor itself, which is vitally important for those organisms which need to stay in one particular kind of place. Rocky shores and reefs provide a firm fixed substrate for the attachment of plants and animals. Some of these may have kelp forests, which reduce the effect of waves and provide food and shelter for an extended range of organisms. Sandy beaches and bottoms are a relatively unstable substrate and cannot anchor kelp or many of the other benthic organisms. Finally there is open water, above the substrate and clear of the kelp forest, where the organisms must drift or swim. Mixed habitats are also frequently found, which are a combination of those mentioned above.[28] There are no significant estuarine habitats in the MPA.

Rocky shores and reefs

 
Several layers of marine life may co-exist in apparent harmony

There are extensive rocky reefs and mixed rocky and sandy bottoms, with a significant number of wrecks, which are equivalent to rocky reefs for classification of habitat, as in general, marine organisms are not particular about the material of the substrate if the texture and strength is suitable and it is not toxic. For many marine organisms the substrate is another type of marine organism, and it is common for several layers to co-exist. Examples of this are red bait pods, which are usually encrusted with sponges, ascidians, bryozoans, anemones, and gastropods, and abalone, which are usually covered by similar seaweeds to those found on the surrounding rocks, usually with a variety of other organisms living on the seaweeds.[28]: Ch.2 

The type of rock of the reef is of some importance, as it influences the range of possibilities for the local topography, which in turn influences the range of habitats provided, and therefore the diversity of inhabitants. Granite reefs generally have a relatively smooth surface in the centimetre to decimetre scale, but are often high profile in the metre scale, so they provide macro-variations in habitat from relatively horizontal upper surface, near vertical sides, to overhangs, holes and tunnels, on a similar scale to the boulders and outcrops themselves. There are relatively few small crevices compared to the overall surface area. Sandstone and other sedimentary rocks erode and weather very differently, and depending on the direction of dip and strike, and steepness of the dip, may produce reefs which are relatively flat to very high profile and full of small crevices. These features may be at varying angles to the shoreline and wave fronts. There are far fewer large holes, tunnels and crevices in sandstone reefs, but often many deep but low near-horizontal crevices. In some areas the reef is predominantly wave-rounded medium to small boulders. In this case the type of rock has little influence.

The coastline in this region was considerably lower during the most recent ice-ages, and the detail topography of the dive sites was largely formed during the period of exposure above sea level. As a result, the underwater relief is mostly very similar in character to the nearest landscape above sea level. There are notable exceptions where the rock above and below the water is of a different type. These are mostly in False Bay south of Smitswinkel Bay, where there is a sandstone shore with granite reefs.[17]

Kelp forests

 
Dense kelp forest with algal understorey

Kelp forests are a variation of rocky reefs, as the kelp requires a fairly strong and stable substrate which can withstand the loads of repeated waves dragging on the kelp plants. The Sea bamboo Ecklonia maxima grows in water which is shallow enough to allow it to reach to the surface with its gas-filled stipes, so that the fronds form a dense layer at or just below the surface, depending on the tide. The shorter Split-fan kelp Laminaria pallida grows mostly on deeper reefs, where there is not so much competition from the sea bamboo. Both these kelp species provide food and shelter for a variety of other organisms, particularly the Sea bamboo, which is a base for a wide range of epiphytes, which in turn provide food and shelter for more organisms.[28]: Ch.4  There are also places where the spined kelp Ecklonia radiata can be found east of Cape Point, and bladder kelp, Macrocystis pyrifera in sheltered areas west of Cape Point, often inshore of the Ecklonia forests.[29]

Sandy beaches and bottoms (including shelly, pebble and gravel bottoms)

Sandy bottoms at first glance appear to be fairly barren areas, as they lack the stability to support many of the spectacular reef based species, and the variety of large organisms is relatively low. The sand is continually being moved around by wave action, to a greater or lesser degree depending on weather conditions and exposure of the area. This means that sessile organisms must be specifically adapted to areas of relatively loose substrate to thrive in them, and the variety of species found on a sandy or gravel bottom will depend on all these factors. Sandy bottoms have one important compensation for their instability, animals can burrow into the sand and move up and down within its layers, which can provide feeding opportunities and protection from predation. Other species can dig themselves holes in which to shelter, or may feed by filtering water drawn through the tunnel, or by extending body parts adapted to this function into the water above the sand.[28]: Ch.3 

The open sea

The pelagic water column is the major part of the living space at sea. This is the water between the surface and the top of the benthic zone, where living organisms swim, float or drift, and the food chain starts with phytoplankton, the mostly microscopic photosynthetic organisms that convert the energy of sunlight into organic material which feeds everything else, directly or indirectly. In temperate seas there are distinct seasonal cycles of phytoplankton growth, based on the available nutrients and the available sunlight. Either can be a limiting factor. Phytoplankton tend to thrive where there is plenty of light, and they themselves are a major factor in restricting light penetration to greater depths, so the photosynthetic zone tends to be shallower in areas of high productivity.[28]: Ch.6  Zooplankton feed on the phytoplankton, and are in turn eaten by larger animals. The larger pelagic animals are generally faster moving and more mobile, giving them the option of changing depth to feed or to avoid predation, and to move to other places in search of a better food supply. Plankton blooms following upwelling events are a characteristic of the west side of the peninsula in particular

Red tides

On the west coast of the peninsula and to a lesser extent the east side of False Bay, the south easterly winds can cause upwelling of deep, cold, nutrient rich waters. This generally happens in summer when these winds are strongest, and this in combination with the intense summer sunlight provides conditions conducive to rapid growth of phytoplankton. If the upwelling is then followed by a period of light wind or onshore winds, some species of phytoplankton can bloom so densely that they colour the water, most noticeably a reddish or brownish colour, which is known as a red tide.[28]

Depending on the species involved, these red tides may cause mass mortalities to marine animals for various reasons. In some cases the organisms may consume all the available nutrients and then die, leaving decaying remains which deplete the water of oxygen, asphyxiating the animal life, while others may simply become so dense that they clog the gills of marine animals, with similar effect. A third group are inherently toxic, and these may be particularly problematic as some filter feeding species are immune to the toxins but accumulate them in their tissues and will then be toxic to humans who may eat them.[28]

Red tides also have the effect of reducing light penetration. The reduction in illumination can range from a mild effect in the surface layers, to seriously reduced illunmination to considerable depth. Red tides may be small and localised and usually last for a few days, but in extreme cases have been known to extend from Doringbaai to Cape Agulhas, several hundred kilometres to both sides of Cape Town, and take weeks to disperse (March 2005).

Marine species diversity

White sharks, abalone, African penguins, many over-exploited linefish species, West coast rock lobster. Besides the resident species and several known migrants, the waters of the MPA are occasionally visited by vagrants carried in by the eddies of the Agulhas Current, which can bring tropical and subtropical specimens normally resident thousands of kilometres away.[30]

Animals

Number of marine animal species listed by phylum:[31][30][23]

Seaweeds

More than 300 species of seaweed are recorded from the Cape Peninsula and False Bay. Most of these in the MPA. These include kelp from three genera, Ecklonia, Laminaria and Macrocystis, and a range of other brown, green and red algae.[32][29] As previously mentioned the kelp forests provide shelter for a wide range of organisms, including other seaweeds, which form algal turfs and understoreys and live as epiphytes on the kelp plants and other sessile organisms. In the inshore shallow water Ecklonia maxima is common, and the plants grow to relatively small sizes to match the water depth. The waters are well illuminated and many other seaweeds live under the kelp canopy, to a large extent crowding out the sessile fauna. In slightly deeper water the Ecklonia reaches its maximum size and biomass per area. In this zone Laminaria pallida, the split-fan kelp, forms a secondary canopy, and under this an understorey of smaller seaweeds, including many species of encrusting and arborescent red seaweeds. In deeper water the Ecklonia do not thrive and are taken over by Laminaria. When there is insufficient light for Laminaria the algal turf is mostly red seaweeds, including many varieties of corallines.[28] Kelp beds are important to the life cycle of several animals. The sea urchin Parechinus angulosus feeds on kelp detritus, and browse the sporelings, keeping the rock surfaces relatively free of young kelp plants. Where there are sparse urchins, the kelp can establish more easily, and adult Laminaria fronds tend to sweep the underlying surfaces of some of the invertebrates which browse on the kelp. On deeper reefs, and on more steeply sloped rock surfaces there is less seaweed biomass as the light is insufficient.[28]

Endemism

Endemism is the ecological state of a species being unique to a defined geographic location, such as an island, nation, country or other defined zone, or habitat type; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. The extreme opposite of endemism is cosmopolitan distribution. The MPA is small, and it is unlikely that there are any species endemic to only the MPA, but it may be the only or largest MPA within the known range of some endemic species. Some species are only recorded from the MPA, but this may be an artifact of the relatively high level of research and observation in this region.

Invasive species

At least two marine species that have become truly invasive affect this MPA - Carcinus maenas, the European shore crab, and Mytilus galloprovincialis, the Mediterranean mussel.[33]

The main ecological effect of the Mediterranean mussel invasion has been the increase in the extent of mussel beds in the region, crowding out other species which would otherwise occupy the reef surface, particularly the limpet, Scutellastra argenvillei The extended mussel beds also increase habitat available for infaunal species and provide more food for some species, particularly the African oystercatcher (Haematopus moquini).[33]

Threats

This marine protected area suffers from both large scale and small scale poaching of fish, abalone and rock lobsters. Of the small scale poaching, there are two different main methods: hand-line poaching and small group poaching. Hand-line poaching usually consists of two people and is considered a skill. Poachers know the type of fish based on the way the line is pulled. Small scale poaching includes about 10-12 people fishing from boats. These groups are self-organized and often have informal rules governing where each group can fish. Small scale poaching exposes existing issues within local communities that use the marine protected area including: lack of job diversity, lack of education, and lack of proper enforcement.[11] Poaching of abalone and lobster is prevalent and there is an additional risk that interactions with poachers can endanger staff and visitors.[8]

Other threats include pollutants from city rivers, storm water and sewage effluent that affect water quality, urban development; high tourist numbers, eutrophication and harmful algal blooms, pressures from small-scale fishers requiring greater access to marine resources, and invasive alien species.[6]

See also

 
Marine protected areas of South Africa[34][35]

External links

  • Table Mountain National Parks page at SANParks website
  • Diving the Cape Peninsula and False Bay – A free recreational diving guide to the waters of the region.

References

  1. ^ a b c d e f g h i j "Government Notice 695: Marine Living Resources Act (18/1998): Notice declaring the Table Mountain National Park Marine Protected Area under section 43" (PDF). Government Gazette: 3–9. 4 June 2004.
  2. ^ a b c d e "Table Mountain National Park". MPA Forum South Africa. Retrieved 26 May 2018.
  3. ^ "Table Mountain National Park – A Biological Hotspot". Siyabona Africa. Retrieved 26 May 2018.
  4. ^ Declaration of areas as Marine Protected Areas: Government Notice R1429 in Government Gazette 21948 (PDF). 29 December 2000. Retrieved 19 January 2019 – via Centre for Environmental Rights.
  5. ^ a b c "Marine Protected Areas". World Wildlife Fund. Retrieved 24 May 2018.
  6. ^ a b c d e Fielding, P. (2021). Marine & Coastal Areas under Protection: Republic of South Africa (PDF). UNEP-Nairobi Convention and WIOMSA. 2021. Western Indian Ocean Marine Protected Areas Outlook: Towards achievement of the Global Biodiversity Framework Targets. (Report). Nairobi, Kenya: UNEP and WIOMSA. pp. 133–166. ISBN 978-9976-5619-0-6.
  7. ^ a b c d e f "Table Mountain National Park Marine Protected Area - Site description". Atlas of Marine Protection. Retrieved 24 May 2018.
  8. ^ a b c d e Table Mountain National Park management and staff (November 2015). "Table Mountain National Park – Park Management Plan: 2015-2025" (PDF). SANParks. Retrieved 26 May 2018.
  9. ^ Chadwick, Peter; Duncan, John; Tunley, Karen (2014). State of Management of South Africa's Marine Protected Areas (PDF). Cape Town, SA: World Wide Fund for Nature. pp. 27–33.
  10. ^ "Marine Protected Area". Retrieved 26 May 2018.
  11. ^ a b Omari, Navonaeli (2007). Legal Pluralism in Environmental Management (PDF). University of Cape Town: Department of Environmental and Geographical Sciences University of Cape Town.
  12. ^ Sowman, Merle; Hauck, Marie; van Sittert, Lance; Sunde, Jackie (2011-04-01). "Marine Protected Area Management in South Africa: New Policies, Old Paradigms". Environmental Management. 47 (4): 573–583. Bibcode:2011EnMan..47..573S. doi:10.1007/s00267-010-9499-x. PMID 20449745. S2CID 38057635.
  13. ^ "Diving the Cape Peninsula and False Bay". Retrieved 8 August 2019.
  14. ^ a b "Standard positions for SeaKeys dive sites: Dive sites of the Cape Town region". iNaturalist.org. Retrieved 6 February 2019.
  15. ^ Jordaan, Nomahlubi (28 June 2019). "Octopus fishing stopped in False Bay after whale deaths". timeslive.co.za. Retrieved 24 August 2020.
  16. ^ Hudson, Pippa. "New rules for octopus fishing in False Bay following whale deaths". Retrieved 24 August 2020.
  17. ^ a b c d e f g Compton, John S. (2004). The Rocks & Mountains of Cape Town. Cape Town: Double Story. ISBN 978-1-919930-70-1.
  18. ^ Theron, J.N.; Gresse, P.G.; Siegfried, H.P.; Rogers, J. (1992). Explanation sheet 3318 – The Geology of the Cape Town Area. Pretoria: Geological Survey, Department of Mineral and Energy Affairs, Government Printer. ISBN 978-0-621-14284-6.
  19. ^ Terhorst, A. (July 1988). The seafloor environment off Simon's Town in False Bay, revealed by side-scan sonar, bottom sampling, diver observations and underwater photography. Bulletin No.22 (Report). Department of Geology, University of Cape Town.
  20. ^ a b Coleman, Fawaaz (April 2019). The Development and Validation of a Hydrodynamic Model of False Bay (Thesis). University of Stellenbosch.
  21. ^ a b Garmin Mapsource BlueChart Atlantic V5 (Map). Garmin. 2003.
  22. ^ Pfaff, Maya C.; Logston, Renae C.; Raemaekers, Serge J. P. N.; Hermes, Juliet C.; Blamey, Laura K.; Cawthra, Hayley C.; Colenbrander, Darryl R.; Crawford, Robert J. M.; Day, Elizabeth; du Plessis, Nicole; Elwen, Simon H.; Fawcett, Sarah E.; Jury, Mark R.; Karenyi, Natasha; Kerwath, Sven E.; Kock, Alison A.; Krug, Marjolaine; Lamberth, Stephen J.; Omardien, Aaniyah; Pitcher, Grant C.; Rautenbach, Christo; Robinson, Tamara B.; Rouault, Mathieu; Ryan, Peter G.; Shillington, Frank A.; Sowman, Merle; Sparks, Conrad C.; Turpie, Jane K.; van Niekerk, Lara; Waldron, Howard N.; Yeld, Eleanor M.; Kirkman, Stephen P. (2019). "A synthesis of three decades of socio-ecological change in False Bay, South Africa: setting the scene for multidisciplinary research and management". Elementa: Science of the Anthropocene. 7 (32). doi:10.1525/elementa.367. Creative Commons Attribution 4.0 International License (CC-BY 4.0)
  23. ^ a b c d Jones, Georgina (2008). A field guide to the marine animals of the Cape Peninsula. Cape Town: SURG. ISBN 978-0-620-41639-9.
  24. ^ "Dungeons Reef – Cape Town Spot Check". www.zigzag.co.za. 12 August 2010. Retrieved 3 June 2019.
  25. ^ "South Africa's Dungeons surf spot unleashes world class waves". www.brandsouthafrica.com. 5 September 2016. Retrieved 3 June 2019.
  26. ^ Sink, K.; Harris, J.; Lombard, A. (October 2004). Appendix 1. South African marine bioregions (PDF). South African National Spatial Biodiversity Assessment 2004: Technical Report Vol. 4 Marine Component DRAFT (Report). pp. 97–109.
  27. ^ Sink, K; Holness, S; Harris, L; Majiedt, P; Atkinson, L; Robinson, T; Kirkman, S; Hutchings, L; Leslie, R; Lamberth, S; Kerwath, S; von der Heyden, S; Lombard, A; Attwood, C; Branch, G; Fairweather, T.; Taljaard, S.; Weerts, S.; Cowley, P.; Awad, A.; Halpern, B.; Grantham, H; Wolf, T. (2012). National Biodiversity Assessment 2011: Technical Report (PDF) (Report). Vol. 4: Marine and Coastal Component. Pretoria: South African National Biodiversity Institute. p. 325. Note: This is the full document, with numbered pages.
  28. ^ a b c d e f g h i Branch, G.M.; Branch, M.L. (1985). The Living Shores of Southern Africa (3rd impression ed.). Cape Town: C. Struik. ISBN 0-86977-115-9.
  29. ^ a b Branch, G.M.; Branch, M.L.; Griffiths, C.L.; Beckley, L.E. (2010). Two Oceans: a guide to the marine life of southern Africa (2nd ed.). Cape Town: Struik Nature. ISBN 978-1-77007-772-0.
  30. ^ a b Zsilavecz, Guido (2005). Coastal fishes of the Cape Peninsula and False Bay: A divers' identification guide. Cape Town: SURG. ISBN 0-620-34230-7.
  31. ^ Zsilavecz, Guido (2007). Nudibranchs of the Cape Peninsula and False Bay. Cape Town: SURG. ISBN 978-0-620-38054-6.
  32. ^ Stegenga, H.; Bolton, J.J.; Anderson, R.J. (1997). Seaweeds of the South African West Coast. Contributions from the Bolus Herbarium, University of Cape Town. ISBN 0-7992-1793-X.
  33. ^ a b Sink, K. (October 2004). Appendix 2. Threats affecting marine biodiversity in South Africa (PDF). South African National Spatial Biodiversity Assessment 2004: Technical Report Vol. 4 Marine Component DRAFT (Report). pp. 97–109.
  34. ^ "MPA Declarations" (PDF). Regulation Gazette No. 42478. Pretoria: Government Printer. 647 (10177). 23 May 2019.
  35. ^ "Protected Areas Register". dffeportal.environment.gov.za. Retrieved 10 July 2022.

table, mountain, national, park, marine, protected, area, inshore, marine, protected, area, around, cape, peninsula, vicinity, cape, town, south, africa, proclaimed, government, gazette, 26431, june, 2004, terms, marine, living, resources, 1998, iucn, category. The Table Mountain National Park Marine Protected Area is an inshore marine protected area around the Cape Peninsula in the vicinity of Cape Town South Africa It was proclaimed in Government Gazette No 26431 of 4 June 2004 in terms of the Marine Living Resources Act 18 of 1998 1 Table Mountain National Park Marine Protected AreaIUCN category IV habitat species management area Table Mountain National Park Marine Protected Area locationLocationCoastal Western Cape South AfricaNearest cityCape TownCoordinates34 00 S 18 20 E 34 000 S 18 333 E 34 000 18 333 Coordinates 34 00 S 18 20 E 34 000 S 18 333 E 34 000 18 333Area953 25 km2 368 05 sq mi EstablishedProclaimed under the MLRA in 2004Governing bodySANParksWorld Heritage siteCape Floral Region terrestrial Table Mountain National Park Marine Protected Area South Africa The MPA is of value for conservation of a wide range of endemic species and has considerable economic value as a tourist destination It encloses a large number of recreational dive sites visited by local residents and tourists from further afield The shark and whale watching tourist industries are also represented and there are several popular surf breaks The MPA is mainly a controlled zone where extractive activities are allowed under permit with six small no take zones The MPA is administrated by the Table Mountain National Park a branch of SANParks The marine ecology is unusually varied for an area of this size as a result of the meeting of two major oceanic water masses near Cape Point and the park extends into two coastal marine bioregions The ecology of the west or Atlantic Seaboard side of the park is noticeably different in character and biodiversity to that of the east or False Bay side Both sides are classified as temperate waters but there is a significant difference in average temperature with the Atlantic side being noticeably colder on average 2 The MPA contains culturally significant fish traps historical wrecks and traditional fishing communities and is also important for commercial fisheries Part of the West Coast rock lobster industry takes place within the MPA as well as recreational and subsistence fishers and an illegal poaching industry mostly targeting abalone rock lobster and territorial linefish from the no take zones 2 Contents 1 History 2 Purpose 3 Extent 3 1 Zonation 3 2 Boundaries 3 2 1 Restricted areas 4 Management 4 1 Law enforcement 4 2 Budget 5 Use 5 1 Slipways and harbours in the MPA 5 2 Activities requiring a permit 5 2 1 Fishing 5 2 2 Scuba diving 5 2 2 1 Named dive sites 5 3 Experimental fisheries 6 Prohibited activities 7 Geography 7 1 General topography 7 1 1 Bottom morphology 7 2 Geology 7 3 Hydrography 7 4 Bathymetry 7 5 Climate of the Cape Peninsula 7 6 Sea conditions 7 6 1 Seasonal variations in sea conditions 8 Ecology 8 1 Habitats 8 2 Marine species diversity 8 2 1 Animals 8 2 2 Seaweeds 8 2 3 Endemism 8 2 4 Invasive species 9 Threats 10 See also 11 External links 12 ReferencesHistory EditThe MPA was proclaimed by the Minister of Environmental Affairs and Tourism Marthinus van Schalkwyk in Government Gazette No 26431 of 4 June 2004 in terms of the Marine Natural Resources Act 18 of 1998 1 The Table Mountain National Park was originally established as the Cape of Good Hope Nature Reserve in 1939 The mountain above the 152 metre contour was proclaimed a national monument in 1958 The reserve was later expanded and in 1998 the Cape Peninsula National Park was proclaimed In 2004 it was renamed as the Table Mountain National Park and the Marine protected area added 3 The Castle Rock Marine Protected Area previously known as the Millers Point Marine Reserve was proclaimed as a marine protected area in Government Notice R1429 in Government Gazette 21948 of 29 December 2000 4 This section needs expansion You can help by adding to it May 2018 Purpose EditA marine protected area is defined by the IUCN as A clearly defined geographical space recognised dedicated and managed through legal or other effective means to achieve the long term conservation of nature with associated ecosystem services and cultural values 5 This MPA is specifically intended to protect the marine environment and biodiversity of the region to promote sustainable use of marine resources in the MPA to allow over exploited species of fish abalone and rock lobster a sanctuary in which to breed and recover to develop awareness of the MPA among recreational users and to promote and regulate eco tourism and scientific research 6 1 Waters from the cold Benguela current and warm Agulhas currents meet and mix in the vicinity of the Cape Peninsula resulting in a region of high marine biodiversity The TMNPMPA is intended to protect this region to help sustainable commercial and recreational use of the coastal waters 7 The six smaller restricted or no take zones are thought to be breeding and nursery areas for marine life and the hope is that by leaving these relatively undisturbed threatened species will have a chance to regenerate and increase the stock in adjacent areas 7 Extent EditThe MPA extends from Mouille Point in the north west south along the west coast of the peninsula around Cape Point and north along the east coast of the peninsula to Muizenberg in the north east with a total length of 127 km 79 mi 2 of coastline and area of 953 25 km2 368 05 sq mi 7 There are three 3 harbours within the MPA the naval base and yacht club marina at Simon s Town Kalk Bay fishing harbour and Hout Bay fishing harbour and marina There are also small craft launching sites at Witsands Kommetjie no slipway Millers Point Simon s Town Buffels Bay and just outside the MPA at Granger Bay The major international port at Cape Town is also just outside the MPA 2 There are six restricted zones in which no fishing or extractive activities are allowed excepting that in the Karbonkelberg restricted area fishing for snoek Thyrsites atun is allowed beyond the 35 m isobath The combined area of the no take zones is 56 4 km2 21 8 sq mi 7 Zonation Edit A Restricted Area is a part of a marine protected area also known as a No Take area in which all extraction and harvesting of marine plant and animal life is prohibited There are six of these within the TMNPMPA 5 The remainder of the MPA is designated as a Controlled Area where extraction and harvesting of marine life and other activities are allowed on condition that one has a valid permit allowing one or more of the following specific activities spear fishing angling scuba diving snorkelling for mollusc extraction boating commercial diving salvage operations scientific research commercial fishing whale watching shark cage diving or filming 5 Boundaries Edit The Table Mountain National Park Marine Protected Area includes the seabed the water and the airspace above it to an altitude of 1000 metres above sea level The lateral boundaries of the controlled area on WGS84 are offshore of the high water mark between Green Point at S33 54 075 E018 24 037 and Bailey s Cottage Muizenberg at S34 06 590 E018 28 250 to a line drawn east 090 T from the beacon at Bailey s Cottage to S34 06 590 E018 33 413 south 180 T to S34 24 444 E018 33 413 west 270 T to S34 24 444 E018 15 000 north 000 T to S33 54 075 E018 15 000 and east 090 T to Green Point at S33 54 075 E018 24 037 1 Restricted areas Edit Karbonkelberg Restricted zone Offshore from the high water mark between Oudekraal at S33 58 757 E018 21 847 and Hout Bay at S34 03 660 E018 20 252 west 270 T from Hout Bay to S34 03 660 E018 17 797 north 000 T to S33 58 757 E018 17 797 and east 090 T to Oudekraal at S33 58 757 E018 21 847 1 Cape of Good Hope Restricted zone Offshore from the high water mark between Hoek van die Bobbejaan at S34 18 393 E018 24 258 and Schusters Bay Point Scarborough at position S34 12 271 E018 22 194 south 180 T from Schuster s Bay point to S34 16 490 E018 22 194 to S34 18 393 E018 23 500 and east 090 T from position S34 18 393S E018 23 500E to Hoek van die Bobbejaan at S34 18 393 E018 24 258 1 Paulsberg Restricted zone Offshore from the high water mark between Venus Pool at S34 17 744 E018 28 020 and Smitswinkel Point at S34 16 549 E018 28 464 east 090 T from Smitswinkel Point to S34 16 549 E018 29 000 south 180 T to S34 17 744 E018 29 000 and west 270 T to Venus Pool at S34 17 744 E018 28 020 1 Castle Rock Restricted zone Offshore from the high water mark between Partridge Point at S34 15 480 E018 28 344 and Millers Point at S34 14 100 E018 28 508 east 090 T from Millers Point to S34 14 100 E018 29 300 south 180 T to S34 15 480 E018 29 300 and west 270 T to Partridge Point at S34 15 480 E018 28 344 Boulders Restricted zone Offshore from the high water mark between Rocklands at S34 12 705 E018 27 781 and Seaforth Simonstown at S34 11 567 E018 26 762 to S34 10 581 E018 27 196 east 090 T to S34 10 581 E018 27 781 and south 180 T to Rocklands at S34 12 705 E018 27 781 St James Restricted zone Offshore from the high water mark between the Kalk Bay Tidal Pool at S34 07 567 E018 27 050 and the St James Tidal Pool at S34 07 123 E018 27 568 south 180 T from the St James Tidal Pool to S34 07 567 E018 27 568 and east 090 T to the Kalk Bay Tidal Pool at S34 07 567 E018 27 050 1 Management EditThe marine protected areas of South Africa are the responsibility of the Department of Environment Forestry and Fisheries of the national government which has management contracts with a variety of MPA management authorities in this case South African National Parks SANParks which manages the MPA with funding from the SA Government through the Department of Environment Forestry and Fisheries which is responsible for issuing permits quotas and law enforcement 6 The marine management objective of the TMNP is stated as To safe guard the sustainable use of marine resources within the Table Mountain Marine Protected Area TMNP MPA and the Responsible tourism high level objective as To develop manage and enhance a range of responsible tourism attractions and products for visitors recreational users and disadvantaged communities to experience and appreciate the rich marine and terrestrial biodiversity and cultural history of the TMNP 8 There is an approved TMNP management plan for 2015 2025 but no specific management plan for the MPA MPA management is included in strategic park management plans for all aspects of the park including the marine component 6 The park officially has staff and resources dedicated to manage aspects of the MPA and cooperate with other marine law enforcement authorities and recognises the importance of compliance monitoring in the management of abalone and West Coast Rock Lobster which are found in the MPA 8 Although there are multiple management programs in place they are understaffed and not always effective in terms of monitoring the MPA Poaching is still a major issue within the MPA that adequate management has failed to effectively address 9 Other major risks to the MPA are assessed as over utilisation of resources and pollution by city storm water outlets sewage effluent dispersal systems and rivers 8 IUCN protected area category IV 7 Habitat Species Management Area MPA id 67704044 7 Bathymetric survey at fine scale Current project of the SA Council for Geoscience to map the bathymetry of False Bay at metre to decimetre resolution Survey completed for Table Bay harbour approaches and the inshore waters of the MPA as far south as Hout BayLaw enforcement Edit The MPA is managed by Table Mountain National Park in conjunction with the Department of Agriculture Forestry and Fisheries TMNP is responsible for the administration inshore law enforcement and educational activities 10 Budget Edit A total of 3 6 of the TMNP operational budget for annual recurring activity is allocated to marine management from 2015 to 2020 comprising R3 440 000 for 2015 6 R3 646 000 for 2016 7 R3 865 000 for 2017 8 R4 097 000 for 2018 9 and R4 343 000 for 2019 2020 8 Use Edit Map showing the distribution of most of the wreck and reef dive sites of the Cape Town local area There is a high level of tourism and recreational activity in the MPA due to the large local population and Cape Town and the Table Mountain National Park being notable international tourism destinations Tourist attractions inside the MPA include scuba diving boat based whale and shark watching snorkelling with seals and high speed scenic boat rides Threatened and protected species supported within the MPA include white sharks abalone African penguins and several over exploited line fish species such as red steenbras This MPA has some of the most intensively studied waters on South Africa due to the presence of universities the natural history museum and several marine research institutes in and near Cape Town so more is known about the local biodiversity than most other MPAs in South African waters 2 Further use opportunities have been identified in education monitoring and research tourism and recreation development and contributions to local economy through poverty alleviation and partnerships 6 Slipways and harbours in the MPA Edit Hout Bay Harbour and slipway Commercial fishing harbour and yacht club marina with public access slipway S34 03 01 76 E018 20 42 97 Soetwater slipway Public access slipway S34 10 692 E018 20 684 Kalk Bay harbour Commercial fishing harbour False Bay Yacht Club Member access marina and slipway S34 11 32 57 E018 26 0 31 Simon s Town naval base Government access harbour and slipways Miller s Point slipway Public access slipway S34 13 49 63 E018 28 25 12 Rumbly Bay slipway Public access slipway on the south side of Millers Point Buffels Bay slipway Public access slipway controlled by TMNP Activities requiring a permit Edit Fishing Edit Fishing is allowed in the controlled zone of the MPA subject to permits regulations catch limits and seasons set by the Department of Agriculture Forestry and Fisheries However it remains a contentious issue in the area Subsistence fishers are prohibited from fishing in no take zones and do not have the boats or technology necessary to safely travel past the no take zone For places where they are allowed to fish they often have to apply for expensive permits In addition for those subsistence fishers that are illiterate they must hire a literate third party to fill out the application for them Finally it is often difficult for these subsistence fishers to prove they have the start up capital or private boat needed to obtain a permit 11 Tension commonly exists between subsistence fishers and commercial fishers who are allowed to harvest rock lobster to measure the ecological growth rate of the species This opportunity is not offered to subsistence fishers because they do not have the necessary gear 12 Other activities requiring permits include recreational scuba diving 1 Scuba diving Edit Main article Scuba diving Most of the recreational dive sites of Cape Town are in the Table Mountain National Park Marine Protected Area A permit is required to scuba dive in any MPA in South Africa These permits are valid for a year and are available at some branches of the Post Office 1 Temporary permits valid for a month may be available at dive shops or from dive boat operators who operate in an MPA A personal recreational scuba diving permit is valid in all South African MPAs where recreational diving is allowed The business permit to operate recreational scuba business operations in an MPA is restricted to a specific MPA Diving for commercial or scientific purposes is also subject to permit Named dive sites Edit See also Recreational dive sites The MPA has a large number of rocky reef and wreck recreational dive sites which have been identified by position and named Many of these have been partly or completely surveyed mapped and described in the travel guide for diving the Cape Peninsula and False Bay on Wikivoyage 13 Some of them are listed here for the west coast of the peninsula from north to south and for the east coast also from north to south roughly following the coastline Atlantic seaboard 14 Three Anchor Bay 33 54 36 S 18 23 85 E 33 90600 S 18 39750 E 33 90600 18 39750 Sea Point Ridge Pinnacles 33 54 905 S 18 21 421 E 33 915083 S 18 357017 E 33 915083 18 357017 Bantry Bay 33 55 56 S 18 22 65 E 33 92600 S 18 37750 E 33 92600 18 37750 North Paw Northern Pinnacles 33 55 745 S 18 21 879 E 33 929083 S 18 364650 E 33 929083 18 364650 Monty s Pinnacles 33 55 797 S 18 21 808 E 33 929950 S 18 363467 E 33 929950 18 363467 North Paw Eastern Pinnacle 33 55 807 S 18 22 019 E 33 930117 S 18 366983 E 33 930117 18 366983 Barry s Pinnacles 33 55 841 S 18 21 647 E 33 930683 S 18 360783 E 33 930683 18 360783 North Paw Cave Rock 33 55 847 S 18 21 789 E 33 930783 S 18 363150 E 33 930783 18 363150 North Lion s Paw main reef 33 55 854 S 18 21 849 E 33 930900 S 18 364150 E 33 930900 18 364150 South Lion s Paw 33 56 308 S 18 21 890 E 33 938467 S 18 364833 E 33 938467 18 364833 Clifton Rocks 33 56 346 S 18 22 222 E 33 939100 S 18 370367 E 33 939100 18 370367 Cleeve s Tunnel 33 56 540 S 18 21 894 E 33 942333 S 18 364900 E 33 942333 18 364900 Bakoven Rock 33 57 555 S 18 22 204 E 33 959250 S 18 370067 E 33 959250 18 370067 Dreadlocks Reef 33 58 22 05 S 18 21 42 59 E 33 9727917 S 18 3618306 E 33 9727917 18 3618306 Geldkis Blinder 33 58 67 S 18 21 62 E 33 97783 S 18 36033 E 33 97783 18 36033 Strawberry Rocks 33 58 719 S 18 21 658 E 33 978650 S 18 360967 E 33 978650 18 360967 Geldkis 33 58 730 S 18 21 613 E 33 978833 S 18 360217 E 33 978833 18 360217 Het Huis te Kraaiestein wreck 33 58 850 S 18 21 650 E 33 980833 S 18 360833 E 33 980833 18 360833 Mushroom Pinnacle 33 58 781 S 18 21 521 E 33 979683 S 18 358683 E 33 979683 18 358683 Justin s Caves 33 58 85 S 18 21 50 E 33 98083 S 18 35833 E 33 98083 18 35833 Sandy Cove 33 58 90 S 18 21 65 E 33 98167 S 18 36083 E 33 98167 18 36083 MV Antipolis wreck 33 59 060 S 18 21 370 E 33 984333 S 18 356167 E 33 984333 18 356167 Klein Pannekoek 33 58 91 S 18 21 09 E 33 98183 S 18 35150 E 33 98183 18 35150 Groot Pannekoek 33 59 13 S 18 20 75 E 33 98550 S 18 34583 E 33 98550 18 34583 Coral Gardens Oudekraal 33 59 270 S 18 20 782 E 33 987833 S 18 346367 E 33 987833 18 346367 Coral Gardens offshore pinnacles 33 59 270 S 18 20 515 E 33 987833 S 18 341917 E 33 987833 18 341917 13th Apostle 33 59 486 S 18 19 922 E 33 991433 S 18 332033 E 33 991433 18 332033 Llandudno Reef 34 00 037 S 18 19 897 E 34 000617 S 18 331617 E 34 000617 18 331617 Logies Bay 34 00 25 S 18 20 53 E 34 00417 S 18 34217 E 34 00417 18 34217 MV Romelia wreck 34 00 700 S 18 19 86 E 34 011667 S 18 33100 E 34 011667 18 33100 Steps 34 01 330 S 18 18 600 E 34 022167 S 18 310000 E 34 022167 18 310000 MFV Harvest Capella wreck 34 01 600 S 18 18 750 E 34 026667 S 18 312500 E 34 026667 18 312500 Rachel s Reef 34 01 431 S 18 18 070 E 34 023850 S 18 301167 E 34 023850 18 301167 Humpback Ridge 34 01 548 S 18 18 142 E 34 025800 S 18 302367 E 34 025800 18 302367 Wilhelm s Wall 34 01 502 S 18 17 931 E 34 025033 S 18 298850 E 34 025033 18 298850 Hakka Reef Middelmas 34 01 747 S 18 18 328 E 34 029117 S 18 305467 E 34 029117 18 305467 Sven s Caves 34 01 760 S 18 18 420 E 34 029333 S 18 307000 E 34 029333 18 307000 Hakka Reef Southeast pinnacles 34 01 780 S 18 18 380 E 34 029667 S 18 306333 E 34 029667 18 306333 Twin Towers 34 01 920 S 18 18 33 E 34 032000 S 18 30550 E 34 032000 18 30550 MV Ker Yar Vor and the Jo May wrecks 34 02 053 S 18 18 631 E 34 034217 S 18 310517 E 34 034217 18 310517 SS Maori wreck 34 02 062 S 18 18 793 E 34 034367 S 18 313217 E 34 034367 18 313217 SAS Gelderland wreck 34 02 070 S 18 18 180 E 34 034500 S 18 303000 E 34 034500 18 303000 BOS 400 and SS Oakburn wrecks 34 02 216 S 18 18 573 E 34 036933 S 18 309550 E 34 036933 18 309550 Die Perd 34 02 282 S 18 18 324 E 34 038033 S 18 305400 E 34 038033 18 305400 Kanobi s Wall 34 02 365 S 18 18 138 E 34 039417 S 18 302300 E 34 039417 18 302300 SURG Pinnacles 34 02 375 S 18 18 015 E 34 039583 S 18 300250 E 34 039583 18 300250 Star Wall 34 02 466 S 18 18 087 E 34 041100 S 18 301450 E 34 041100 18 301450 M amp M Cave 34 02 426 S 18 18 191 E 34 040433 S 18 303183 E 34 040433 18 303183 Lollipop pinnacle 34 02 506 S 18 18 186 E 34 041767 S 18 303100 E 34 041767 18 303100 Sunfish Pinnacle 34 02 475 S 18 18 290 E 34 041250 S 18 304833 E 34 041250 18 304833 Canyon 34 02 595 S 18 18 116 E 34 043250 S 18 301933 E 34 043250 18 301933 Dusky Pinnacles 34 02 590 S 18 18 248 E 34 043167 S 18 304133 E 34 043167 18 304133 Stonehenge North 34 02 522 S 18 18 300 E 34 042033 S 18 305000 E 34 042033 18 305000 A 340 Pinnacle 34 02 740 S 18 18 200 E 34 045667 S 18 303333 E 34 045667 18 303333 Stonehenge Central 34 02 750 S 18 18 300 E 34 045833 S 18 305000 E 34 045833 18 305000 Stonehenge South 34 02 835 S 18 18 365 E 34 047250 S 18 306083 E 34 047250 18 306083 Stonehenge Blinder 34 02 885 S 18 18 316 E 34 048083 S 18 305267 E 34 048083 18 305267 Stonehenge Wreck 34 02 838 S 18 18 335 E 34 047300 S 18 305583 E 34 047300 18 305583 Seal Island Duiker island 34 03 458 S 18 19 562 E 34 057633 S 18 326033 E 34 057633 18 326033 Di s Cracks 34 03 875 S 18 18 414 E 34 064583 S 18 306900 E 34 064583 18 306900 Vulcan Rock 34 03 967 S 18 18 582 E 34 066117 S 18 309700 E 34 066117 18 309700 Tafelberg Reef 34 04 22 S 18 18 93 E 34 07033 S 18 31550 E 34 07033 18 31550 Klein Tafelberg Reef Salad bowl Yacht wreck 34 04 442 S 18 19 191 E 34 074033 S 18 319850 E 34 074033 18 319850 Tafelberg Deep 34 04 736 S 18 19 032 E 34 078933 S 18 317200 E 34 078933 18 317200 Sentinel 34 03 54 S 18 20 82 E 34 05900 S 18 34700 E 34 05900 18 34700 MFV Aster wreck 34 03 891 S 18 20 955 E 34 064850 S 18 349250 E 34 064850 18 349250 MFV Katsu Maru wreck 34 03 903 S 18 20 942 E 34 065050 S 18 349033 E 34 065050 18 349033 Die Josie 34 04 497 S 18 21 256 E 34 074950 S 18 354267 E 34 074950 18 354267 SS Clan Monroe wreck 34 08 817 S 18 18 949 E 34 146950 S 18 315817 E 34 146950 18 315817 SS Thomas T Tucker wreck Star of Africa wreck 34 16 294 S 18 21 855 E 34 271567 S 18 364250 E 34 271567 18 364250 SS Bia wreck 34 16 212 S 18 22 638 E 34 270200 S 18 377300 E 34 270200 18 377300 SS Umhlali wreck 34 16 435 S 18 22 487 E 34 273917 S 18 374783 E 34 273917 18 374783 Albatross Rock 34 16 495 S 18 22 197 E 34 274917 S 18 369950 E 34 274917 18 369950 South west Reefs False Bay west 14 Muizenberg Trawler wrecks 34 07 008 S 18 31 218 E 34 116800 S 18 520300 E 34 116800 18 520300 Dale Brook 34 07 436 S 18 27 154 E 34 123933 S 18 452567 E 34 123933 18 452567 Kalk Bay Harbour Wall 34 07 787 S 18 26 967 E 34 129783 S 18 449450 E 34 129783 18 449450 Fish Hoek Reef 34 03 54 S 18 20 82 E 34 05900 S 18 34700 E 34 05900 18 34700 Sunny Cove 34 08 68 S 18 26 30 E 34 14467 S 18 43833 E 34 14467 18 43833 Quarry 34 09 390 S 18 26 157 E 34 156500 S 18 435950 E 34 156500 18 435950 Quarry Barge 34 09 385 S 18 26 477 E 34 156417 S 18 441283 E 34 156417 18 441283 Glencairn Fan Garden 34 09 418 S 18 26 412 E 34 156967 S 18 440200 E 34 156967 18 440200 P87 wreck 34 09 570 S 18 26 420 E 34 159500 S 18 440333 E 34 159500 18 440333 SS Clan Stuart wreck 34 10 303 S 18 25 842 E 34 171717 S 18 430700 E 34 171717 18 430700 East Indiaman Brunswick wreck 34 10 880 S 18 25 607 E 34 181333 S 18 426783 E 34 181333 18 426783 HMNS Bato wreck 34 10 998 S 18 25 560 E 34 183300 S 18 426000 E 34 183300 18 426000 Long Beach 34 11 239 S 18 25 559 E 34 187317 S 18 425983 E 34 187317 18 425983 Simon s Town Jetty 34 11 525 S 18 26 597 E 34 192083 S 18 443283 E 34 192083 18 443283 False Bay Yacht Club 34 11 527 S 18 26 048 E 34 192117 S 18 434133 E 34 192117 18 434133 Target Reef 34 10 619 S 18 27 226 E 34 176983 S 18 453767 E 34 176983 18 453767 Livingstone Reef 34 10 605 S 18 27 571 E 34 176750 S 18 459517 E 34 176750 18 459517 Castor Rock northern pinnacle 34 10 687 S 18 27 590 E 34 178117 S 18 459833 E 34 178117 18 459833 North Friskies 34 10 720 S 18 27 830 E 34 178667 S 18 463833 E 34 178667 18 463833 Castor Rock 34 10 74 S 18 27 61 E 34 17900 S 18 46017 E 34 17900 18 46017 Friskies Pinnacle 34 10 778 S 18 27 822 E 34 179633 S 18 463700 E 34 179633 18 463700 Wonders Pinnacle 34 10 810 S 18 27 650 E 34 180167 S 18 460833 E 34 180167 18 460833 Roman s Rest 34 10 835 S 18 27 805 E 34 180583 S 18 463417 E 34 180583 18 463417 Roman Rock 34 10 87 S 18 27 60 E 34 18117 S 18 46000 E 34 18117 18 46000 Spider crab Reef 34 10 890 S 18 27 430 E 34 181500 S 18 457167 E 34 181500 18 457167 Tivoli Pinnacles 34 10 892 S 18 27 765 E 34 181533 S 18 462750 E 34 181533 18 462750 Rambler Rock Northwest 34 10 924 S 18 27 899 E 34 182067 S 18 464983 E 34 182067 18 464983 Rambler Rock Northeast 34 10 916 S 18 27 996 E 34 181933 S 18 466600 E 34 181933 18 466600 Rambler Rock Southern Pinnacle 34 11 011 S 18 27 918 E 34 183517 S 18 465300 E 34 183517 18 465300 Hotlips Pinnacle 34 11 146 S 18 28 091 E 34 185767 S 18 468183 E 34 185767 18 468183 Dome Rock 34 11 119 S 18 27 776 E 34 185317 S 18 462933 E 34 185317 18 462933 Ammunition Barges wrecks 34 11 408 S 18 26 985 E 34 190133 S 18 449750 E 34 190133 18 449750 Phoenix shoal 34 11 388 S 18 26 898 E 34 189800 S 18 448300 E 34 189800 18 448300 Noah s Ark and the Ark Rock Wrecks 34 11 533 S 18 27 232 E 34 192217 S 18 453867 E 34 192217 18 453867 Penguin Point Boulders 34 11 889 S 18 27 254 E 34 198150 S 18 454233 E 34 198150 18 454233 Maidstone Rock 34 11 581 S 18 27 466 E 34 193017 S 18 457767 E 34 193017 18 457767 Anchor Reef Maidstone Reef 34 11 575 S 18 27 600 E 34 192917 S 18 460000 E 34 192917 18 460000 Ammo Reef 34 11 564 S 18 27 754 E 34 192733 S 18 462567 E 34 192733 18 462567 Photographer s Reef JJM Reef 34 11 839 S 18 27 434 E 34 197317 S 18 457233 E 34 197317 18 457233 Torch Reef 34 11 700 S 18 27 960 E 34 195000 S 18 466000 E 34 195000 18 466000 Outer Photographer s Reef 34 11 778 S 18 27 898 E 34 196300 S 18 464967 E 34 196300 18 464967 Dangerous Doug reef 34 11 950 S 18 27 650 E 34 199167 S 18 460833 E 34 199167 18 460833 Lace Reef 34 11 960 S 18 28 125 E 34 199333 S 18 468750 E 34 199333 18 468750 Windmill offshore 34 12 050 S 18 28 800 E 34 200833 S 18 480000 E 34 200833 18 480000 Windmill Beach 34 12 06 S 18 27 40 E 34 20100 S 18 45667 E 34 20100 18 45667 Froggy pond 34 12 22 S 18 27 40 E 34 20367 S 18 45667 E 34 20367 18 45667 Fisherman s Beach 34 12 357 S 18 27 497 E 34 205950 S 18 458283 E 34 205950 18 458283 A Frame Oatlands Point 34 12 484 S 18 27 662 E 34 208067 S 18 461033 E 34 208067 18 461033 D Frame Oatlands Reef Wave Rock 34 12 378 S 18 27 996 E 34 206300 S 18 466600 E 34 206300 18 466600 Insanity Reef 34 12 817 S 18 28 044 E 34 213617 S 18 467400 E 34 213617 18 467400 Rocklands Blinder Seal Colony 34 12 9 S 18 28 0 E 34 2150 S 18 4667 E 34 2150 18 4667 Spaniard Rock 34 13 03 S 18 28 03 E 34 21717 S 18 46717 E 34 21717 18 46717 Alpha Reef Outer Spaniard 34 12 987 S 18 28 184 E 34 216450 S 18 469733 E 34 216450 18 469733 Omega Reef 34 12 855 S 18 28 435 E 34 214250 S 18 473917 E 34 214250 18 473917 Stern Reef 34 13 164 S 18 28 032 E 34 219400 S 18 467200 E 34 219400 18 467200 SAS Pietermaritzburg wreck 34 13 303 S 18 28 465 E 34 221717 S 18 474417 E 34 221717 18 474417 PMB Pinnacles 34 13 311 S 18 28 564 E 34 221850 S 18 476067 E 34 221850 18 476067 North Caravan 34 13 353 S 18 28 733 E 34 222550 S 18 478883 E 34 222550 18 478883 Caravan Central 34 13 435 S 18 28 547 E 34 223917 S 18 475783 E 34 223917 18 475783 South Caravan 34 13 513 S 18 28 721 E 34 225217 S 18 478683 E 34 225217 18 478683 Inner Caravan 34 13 500 S 18 28 450 E 34 225000 S 18 474167 E 34 225000 18 474167 Miller s Point Slipway 34 13 822 S 18 28 411 E 34 230367 S 18 473517 E 34 230367 18 473517 Miller s Point tidal pool 34 13 879 S 18 28 559 E 34 231317 S 18 475983 E 34 231317 18 475983 Rumbly Bay 34 14 059 S 18 28 494 E 34 234317 S 18 474900 E 34 234317 18 474900 Murphy s 34 13 956 S 18 28 986 E 34 232600 S 18 483100 E 34 232600 18 483100 Boat Rock Bakoven Rock 34 14 05 S 18 29 05 E 34 23417 S 18 48417 E 34 23417 18 48417 Festival Pinnacle 34 14 140 S 18 29 015 E 34 235667 S 18 483583 E 34 235667 18 483583 Fan Reef 34 14 165 S 18 29 260 E 34 236083 S 18 487667 E 34 236083 18 487667 Shark Alley 34 14 21 S 18 28 60 E 34 23683 S 18 47667 E 34 23683 18 47667 Pyramid Rock 34 14 236 S 18 28 698 E 34 237267 S 18 478300 E 34 237267 18 478300 Castle Pinnacles 34 14 356 S 18 28 826 E 34 239267 S 18 480433 E 34 239267 18 480433 Sansui Reef Japanese Gardens Castle Rocks Point Reefs Outside Castle 34 14 4 S 18 28 8 E 34 2400 S 18 4800 E 34 2400 18 4800 Castle Rocks North Side 34 14 322 S 18 28 65 E 34 238700 S 18 47750 E 34 238700 18 47750 Inner Castle South Castle 34 14 46 S 18 28 674 E 34 24100 S 18 477900 E 34 24100 18 477900 Outer Castle Blindevals 34 14 320 S 18 29 002 E 34 238667 S 18 483367 E 34 238667 18 483367 Phone Reef 34 14 226 S 18 29 202 E 34 237100 S 18 486700 E 34 237100 18 486700 Giant s Castle 34 14 358 S 18 29 226 E 34 239300 S 18 487100 E 34 239300 18 487100 North Pie Rock Reef 34 14 375 S 18 29 075 E 34 239583 S 18 484583 E 34 239583 18 484583 East Pie Rock Pinnacles West Pie Rock Reef 34 14 396 S 18 28 943 E 34 239933 S 18 482383 E 34 239933 18 482383 South Pie Rock Pinnacles 34 14 445 S 18 29 985 E 34 240750 S 18 499750 E 34 240750 18 499750 Whittle Rock Stingray Central Whittle Rock Western Reef Pinnacle 34 14 856 S 18 33 269 E 34 247600 S 18 554483 E 34 247600 18 554483 The Jambles 34 14 885 S 18 28 890 E 34 248083 S 18 481500 E 34 248083 18 481500 Graeme s Spot 34 14 903 S 18 28 917 E 34 248383 S 18 481950 E 34 248383 18 481950 Finlay s Point Jenga Reef 34 14 959 S 18 28 611 E 34 249317 S 18 476850 E 34 249317 18 476850 Finlay s Pinnacle 34 14 97 S 18 28 78 E 34 24950 S 18 47967 E 34 24950 18 47967 Carnaby Street Pinnacle 34 14 985 S 18 28 92 E 34 249750 S 18 48200 E 34 249750 18 48200 Finlay s Deep 34 15 005 S 18 29 194 E 34 250083 S 18 486567 E 34 250083 18 486567 Atlantis Reef 34 15 075 S 18 29 027 E 34 251250 S 18 483783 E 34 251250 18 483783 Sherwood Forest 34 15 190 S 18 29 01 E 34 253167 S 18 48350 E 34 253167 18 48350 Fish Tank 34 15 230 S 18 28 930 E 34 253833 S 18 482167 E 34 253833 18 482167 Partridge Point Seal Rock 34 15 337 S 18 28 892 E 34 255617 S 18 481533 E 34 255617 18 481533 Deep Partridge 34 15 337 S 18 28 930 E 34 255617 S 18 482167 E 34 255617 18 482167 Dave s Caves 34 15 378 S 18 28 704 E 34 256300 S 18 478400 E 34 256300 18 478400 Partridge Point Big Rock 34 15 465 S 18 28 788 E 34 257750 S 18 479800 E 34 257750 18 479800 Peter s Pinnacles 34 15 515 S 18 28 687 E 34 258583 S 18 478117 E 34 258583 18 478117 SAS Transvaal wreck 34 16 005 S 18 28 761 E 34 266750 S 18 479350 E 34 266750 18 479350 MFV Orotava wreck 34 15 998 S 18 28 774 E 34 266633 S 18 479567 E 34 266633 18 479567 MFV Princess Elizabeth wreck 34 16 068 S 18 28 839 E 34 267800 S 18 480650 E 34 267800 18 480650 SAS Good Hope wreck 34 16 054 S 18 28 850 E 34 267567 S 18 480833 E 34 267567 18 480833 Good Hope Reef 34 16 049 S 18 28 893 E 34 267483 S 18 481550 E 34 267483 18 481550 MV Rockeater wreck 34 16 127 S 18 28 890 E 34 268783 S 18 481500 E 34 268783 18 481500 Kreef Reef 34 16 360 S 18 28 780 E 34 272667 S 18 479667 E 34 272667 18 479667 Horseshoe Reef 34 16 410 S 18 28 940 E 34 273500 S 18 482333 E 34 273500 18 482333 Smits Reef 34 16 486 S 18 28 929 E 34 274767 S 18 482150 E 34 274767 18 482150 Batsata Maze 34 16 517 S 18 29 017 E 34 275283 S 18 483617 E 34 275283 18 483617 Smits Reef West Pinnacle 34 16 495 S 18 28 863 E 34 274917 S 18 481050 E 34 274917 18 481050 Smits Cliff Hell s Gate 34 16 48 S 18 28 41 E 34 27467 S 18 47350 E 34 27467 18 47350 Batsata Rock 34 16 602 S 18 28 830 E 34 276700 S 18 480500 E 34 276700 18 480500 Bordjiesrif 34 18 99 S 18 27 83 E 34 31650 S 18 46383 E 34 31650 18 46383 Buffels Bay 34 19 217 S 18 27 73 E 34 320283 S 18 46217 E 34 320283 18 46217 Anvil Rock pinnacle 34 22 218 S 18 30 910 E 34 370300 S 18 515167 E 34 370300 18 515167 Anvil Rock caves 34 22 224 S 18 31 068 E 34 370400 S 18 517800 E 34 370400 18 517800 Experimental fisheries Edit An experimental octopus fishery was started in 2014 to gather data on octopus harvesting potential with a view to establishing a sustainable fishery and enhancing job creation and economic development in coastal areas The deaths of whales trapped in octopus trap ropes led to protests and temporary suspension of the fishery pending scientific investigation of the experimental octopus fishery in False Bay in June 2019 Some of the fishing grounds involved are reefs in the controlled area of the MPA 15 New rules for the octopus fishery intended to reduce the risk of whale entrapment were published and the fishery reopened in November 2019 16 Prohibited activities EditFishing and spearfishing is prohibited in the restricted zones except for fishing for snoek in the Karbonkelberg restricted zone in water more than 35 m deep This section needs expansion You can help by adding to it June 2018 Geography Edit Geological map of the Cape Peninsula and False Bay Geological section of the Cape Peninsula and False Bay General topography Edit The City of Cape Town was founded at the northern end of the Cape Peninsula a narrow mountainous strip of land at the most 11 km wide and just over 50 km long The northern border is the coast of Table Bay a large open bay with a single island Robben Island in its mouth A ragged coastline marks the western border along the Atlantic Ocean A number of small bays are found along the coast with a single large one Hout Bay about half way along Further south the peninsula narrows until it comes to an end at Cape Point A range of mountains with Table Mountain at 1 085m at the northern end forms the backbone of the peninsula The highest point of the southern peninsula is Swartkop at 678 m near Simon s Town The eastern side is bordered by False Bay and this stretch of coastline includes the smaller Smitswinkel Bay Simon s Bay and Fish Hoek Bay At Muizenberg the coastline becomes relatively low and sandy and curves east to Gordon s Bay to form the northern boundary of False Bay From Gordon s Bay the coastline swings roughly south and zig zags its way along the foot of the Hottentot s Holland mountain range to Cape Hangklip which is at nearly the same latitude as Cape Point The highest peak on this side is Kogelberg at 1 269 m In plan the bay is approximately square with rather wobbly edges being roughly the same extent from north to south as east to west 30 km with the entire southern side open to the ocean The area of False Bay has been measured at about 1 090 km and the volume is approximately 45 km3 average depth about 40 m The land perimeter has been measured at 116 km from a 1 50 000 scale map Bottom morphology Edit The bottom morphology of False Bay is generally smooth and fairly shallow sloping gently downwards from North to South so that the depth at the centre of the mouth is about 80 m The bottom is covered with sediment which ranges from very coarse to very fine with most of the fine sediment and mud in the centre of the bay The main exception is a long ridge of sedimentary rock that extends in a southward direction from off the Strand to approximately level with the mouth of the Steenbras River The southern tip of this ridge is known to recreational divers as Steenbras Deep There is one true island in the bay Seal Island a barren and stony outcrop of granite about 200 m long and with an area of about 2 hectare It is about 6 km south of Strandfontein and is less than 10 m above sea level at its highest point There are also a number of small rocky islets which extend above the high water mark and other rocks and shoals which approach the surface Most of these are granite of the Peninsula pluton but east of Seal Island they are generally sandstone either of the Table Mountain series or the underlying Tygerberg formation Outside the bay but influencing the wave patterns in it is Rocky Bank an extensive area of sandstone reef between 20 and 30 m depth A large granite reef Whittle Rock lies on the eastern edge of the MPA about halfway between the north shore and the mouth of the bay Strictly speaking False Bay is part of the Atlantic Ocean which extends as far east as Cape Agulhas but when in Cape Town Atlantic generally refers to the western seaboard of the Cape Peninsula and the east side is referred to as False Bay or the Simon s Town side Geology Edit See also Geology of Cape Town The Cape Peninsula shoreline in the case of left a 25m higher sea level that occurred around 5 and 1 5 million years ago and right a 125m lower sea level at the time of maximum ice build up during cold periods the most recent being 20 000 years ago after John S Compton 2004 The Cape Peninsula is a peninsula that juts out into the Atlantic Ocean at the south western extremity of the African continent At its tip is the Cape of Good Hope The peninsula forms the west side of False Bay The three main rock formations are the late Precambrian Malmesbury group metamorphic rock the Peninsula granite a huge batholith that was intruded into the Malmesbury Group about 630 million years ago and the Table Mountain group sandstones that were deposited on the eroded surface of granite and Malmesbury series basement about 450 million years ago The sand silt and mud deposits were lithified by pressure and then folded during the Cape Orogeny to form the Cape Fold Belt which extends along the western and southern coasts 17 Almost 50 of the Cape Peninsula and Cape Flats area is covered by weakly cemented marine sands Sea levels fluctuated between 120 to 200m from present mean sea level during the Pliocene and subsequent Pleistocene ice age between 2 million and 15000 years ago as a result of fluctuating global temperature and variable amounts of water accumulated in polar ice caps 17 At times the sea covered the Cape Flats and Noordhoek valley and the Cape Peninsula was then a group of islands Beach sands with shell fragments and estuarine muds were deposited and later overlain by calcrete cemented dune sands as the sea retreated Dune rock that was deposited during a Pleistocene interglacial period about 120 000 years ago is now being eroded in the sea cliffs near Swartklip 17 During glacial periods the sea level dropped to expose the bottom of False Bay to weathering and erosion The last major regression about 20 000 years ago lowered the sea level to the present 130m isobath which is south of Cape Point and Cape Hangklip leaving the entire bottom of False Bay and a large part of the continental shelf to the west of the peninsula exposed During this period an extensive system of dunes was formed on the sandy floor of False Bay 17 Over the last 2 million years of the Quaternary geological period cool glacial periods hypothermals about 100 000 years long have been the norm Canada and northern Eurasia were covered by continental ice sheets kilometres thick and the global effect was a lowering of sea level by some 130m because the sea was the source of the frozen water of these huge ice sheets This means that False Bay and Table Bay were dry and covered by dunes for 90 of the last 2 million years Warm interglacial periods hyperthermals have lasted only about 10 000 years and we are part way through the latest one which started about 6000 years ago The coastline of False Bay therefore was usually across the mouth of the present False Bay Robben Island was a hill on a coastal plain with the coast west of the island for most of the past 2 million years 17 Sea level rises due to global warming may eventually increase this trend The large and small scale relief of the coastal seabed is largely dependent on the local surface formation where this is exposed above the generally sandy bottom The granite areas are usually rounded corestone outcrops influenced by the local jointing patterns and can range between tall pinnacles large low slab like outcrops and aggregations of boulders of a wide range of sizes Usually a combination of these is present often with sandy patches in local depressions while the sedimentary facies present a more variable aspect depending on the rock type dip strike and thickness of the layers present A very good estimate of underwater relief character can be made by observing the local topography above the water An interesting local phenomenon is the contact zone between the intrusive granite of the Peninsula pluton and the older Malmesbury strata visible at the Sea Point shoreline 17 The bottom off the west coast of the cape Peninsula between and beyond the rocky reef areas is largely fairly fine white quartzitic sand with some areas of coarser shelly sand The bottom sediments of False Bay are more varied On the west side of the bay there is a general tendency towards fine to medium quartzitic sand and coarser calcareous material mostly mollusc shell fragments with patches of a maerl of branching coralline algae fragments There are also areas of very fine sand almost mud in the more sheltered Simon s Bay Most of the intertidal zone of the peninsula is rocky shoreline but there are several sandy beaches of varying extent 18 19 Hydrography Edit See also False Bay Waves tides and water circulation The Benguela current flows northward along the west coast and Agulhas eddies move westwards along the south coast bringing occasional warmer water into False Bay along with drifting organisms from far upcurrent which are often unsuited to the local conditions and do not survive long There are a few places in False Bay where they tend to end up Currents in False Bay are generally weak local wind driven shallow and not very predictable Inshore currents in the MPA along the west coast also generally shallow and wind driven Wind driven upwellings on the west coast are driven by strong south easterly winds which mostly blow in summer Cold clear nutrient rich water is drawn up from the deep to replace surface water driven offshore by Ekman transport usually followed closely by algal blooms powered by the intense summer sunlight which rapidly reduce water clarity and provide food for zooplankton Lesser upwellings also driven by south easterly winds in summer occur on the east side of False Bay near Cape Hangklip and Rooiels where surface water temperatures can be 6 to 7 C colder than the surrounding areas and bottom temperatures below 12 C 20 10 Water temperature varies with the seasons In summer False Bay is thermally stratified with a vertical temperature variation of 5 to 9 C between the warmer surface water and cooler depths below 50 m while in winter the water column is at nearly constant temperature at all depths The development of a thermocline is strongest around late December and peaks in late summer to early autumn 20 8 The volume of fresh water runoff from rivers and stormwater drainage is low and mostly in late winter Bathymetry Edit False Bay Bathymetry from SA Council for Geoscience See also False Bay Bathymetry The Bathymetry of False Bay differs in character from the west side of the Cape Peninsula The west coast seabed tends to slope down more steeply than in False Bay and although the close inshore waters are also shallow the 100 m contour is mostly within about 10 km of the west coast while the entire False Bay is shallower than about 80 m 21 The bottom of the bay slopes down relatively gradually from the gently sloping beaches of the north shore to the mouth and is fairly even in depth from east to west except close to the shorelines with three major features disrupting this gentle slope These are the granite outcrops of Seal island and Whittle Rock and the hard sedimentary rock of the Steenbras ridge Just outside the bay there is a large shoal area at Rocky Bank a relatively shallow area around Cape Pont with two large pinnacles at Bellows Rock and Anvil Rock and a long ridge extending south west from Cape Hangklip which channels cold nutrient rich water into the west side of the bay during upwelling events Seal Island Hangklip Ridge Steenbras ridge and most of Whittle Rock are outside of the MPA 22 Tidal range is moderate with about 2 m range at spring tide on both sides of the peninsula and tidal currents are negligible 21 Climate of the Cape Peninsula Edit See also Climate of South Africa Western Cape Climate and Cape Town Climate The climate of the South western Cape is markedly different from the rest of South Africa which is generally a summer rainfall region receiving most of its rainfall during the summer months of December to February The South western Cape has a Mediterranean type climate with most of its rainfall during the winter months from June to September The south westerly winds over the South Atlantic and Southern Ocean produce the prevailing south westerly swell which is strongest in the winter months and which beats on the exposed Atlantic coastline and the east side of False Bay The mountains of the Cape Peninsula provide protection on the east side of the peninsula from this wind and from the south westerly waves a fact which influenced Governor Simon van der Stel in his choice of Simon s Bay as a winter anchorage for the Dutch East India Company s ships for Cape Town Winter in the South western Cape is strongly influenced by disturbances in the region between the circumpolar westerly winds and south easterly trade winds resulting in a series of eastward moving frontal depressions These bring cool cloudy weather and rain on winds from the north west along the cold fronts which move in from the south west The north westerly winter storms have wrecked many ships anchored in Table Bay over the centuries Even today in spite of technical advances and improved weather forecasting this still happens though less frequently than in the past and recently the salvage operations are more often successful As the front passes the wind shifts to south westerly and eventually south easterly as the pressure rises until the next front The period between fronts tends to be in the order of a week but can be highly variable During the summer the dominant factor determining the weather in the region is a high pressure zone known as the South Atlantic High located over the South Atlantic ocean to the west of the Cape coast This high pressure zone moves seasonally following the sun The more southerly position of this high pressure zone in summer has the effect of blocking the cold fronts and restricting them to pass mostly south of the continent Winds circulating in an anticlockwise direction from such a system reach the Cape from the south east producing periods of up to several days of high winds and mostly clear skies These south easterly winds are locally known as the Cape Doctor They keep the region relatively cool and free of industrial pollutants Because of the south facing aspect of False Bay the west side of the bay is exposed to these winds while Table Bay and the west coast of the peninsula experience an offshore wind This wind pattern is locally influenced by the topography to the extent that gale force winds may be blowing in one place while a few kilometers away it may be almost calm Sea conditions Edit The waves reaching the shores of False Bay and the Cape Peninsula can be considered as a combination of local wind waves and swell from distant sources The swell is produced by weather systems generally south of the continent sometimes considerably distant the most important of which are the frontal systems in the South Atlantic which generate wind waves which then disperse away from their source and separate over time into zones of varying period The long period waves are faster and have more energy and move ahead of the shorter period components so they tend to reach the coast first This is known to surfers as a pulse and is generally followed by gradually shortening period swell of less power Local winds will also produce waves which will combine their effects with the swell Offshore winds as a general rule will flatten the sea as the fetch distance that the wind has blown over the water is too small to develop waves of great height or length Onshore winds on the other hand if strong enough will produce a short chop South easterly winds which blow offshore and along the coast on the west side of the Cape Peninsula and the east side of False Bay cause a movement of surface water offshore to the west of the coast This movement of water away from the coast is compensated by the upwelling of deeper water The upwelled water is generally cold and relatively clear However as the upwelled water has a high nutrient content the upwellings are often forerunners of a plankton bloom known as a red tide which will drastically reduce visibility The local tides are relatively weak and there are no strong tidal currents on the Atlantic coast or in False Bay Maximum tidal range at Cape Town is approximately 1 86 m spring tides and at Simon s Town 1 91 m with minimum ranges at both places of about 0 26 m neap tides Average summer surface temperature of the Atlantic off the Cape Peninsula is in the range 10 to 13 C The bottom temperature may be a few degrees colder Minimum temperature is about 8 C and maximum about 17 C Average winter surface temperature of the Atlantic off the Cape Peninsula is in the range 13 to 15 C The bottom temperature inshore is much the same Average winter surface temperature of False Bay is approximately 15 C and the bottom temperature much the same Average summer surface temperature of False Bay is approximately 19 C The bottom temperature is 1 to 3 C lower than it is in winter and a distinct thermocline will usually develop between December and about May A shallow surface current may be produced by strong winds Tidal currents are negligible Cape Point may have stronger currents where eddies from the Agulhas current frequently produce a light to medium strength current Turbidity has a strong influence on the penetration of light to depth including the wavelengths that penetrate and long term turbidity can affect the growth of seaweeds which depend on sufficient light for photosynthesis The depth distribution of the various species found in the waters of the MPA vary depending on the general turbidity of the water of the specific area Seasonal variations in sea conditions Edit There is a significant seasonal variation in sea conditions in the MPA In summer the South Atlantic High moves south over the ocean to the west of the Cape Peninsula and brings south easterly winds to the Cape Peninsula On the west side of the peninsula these winds blow along the coastline and offshore causing an offshore movement of surface water by Ekman transport The offshore flow is compensated by upwelling of bottom water and as the continental shelf is narrow and relatively steeply sloped in this area the upwelled water is generally cold clear and rich in nutrients Surface temperatures can drop by a few degrees over a matter of hours When this water is illuminated by summer sunshine there is generally a phytoplanktonic algal bloom which will produce a sudden increase in microscopic biomass in the surface layer until the turbidity of the water restricts penetration of light to the deeper levels Visibility in the surface water can drop almost as fast at it improved on a clear day and can reduce from tens of metres to less than 5 m in a few hours Deeper water may remain clear but relatively dark The south east wind also causes upwellings on the east coast of False Bay near Hangklip but the upwelled water is not usually as cold has a lower nutrient load and may be turbid so the effect is generally less marked Nevertheless the effect can be impressive phytoplankton blooms known as red tides The water in False Bay is constrained from westward flow by the Cape Peninsula so these red tides can be relatively persistent 23 The south easterly wind can push up a very rough wind wave but the fetch is short and it usually dies down quite quickly but while it lasts it can clear a large amount of benthic fauna off the shallower reefs which may take weeks or months to find its way back In winter the South Atlantic High moves north and the weather pattern is dominated by cold fronts formed over the southern ocean The winds generally follow the pattern of light to strong north westerly swinging though south westerly as the front passes overhead and followed by relatively weak south easterlies North westerly gales produce powerful wind waves which batter the west coast of the peninsula but the east side waters may be calm with a minor wind chop due to the short fetch The westerly winds may also clean up the surface waters of the west side of False Bay and as there is usually much lower insolation at this time of year plankton does not usually bloom and the water remains relatively clear 23 The westerly storms of the southern ocean also produce very large waves with a large amount of their energy propagating towards the north east and as these move away from their source they separate by wave length as the wave velocity is a function of the wavelength with the longer more powerful waves travelling faster and losing less energy as they travel These become swells and by the time they reach the Cape Peninsula the leading pulse is usually in the 13 to 15 second period band occasionally up to 18 seconds Depending on deep water amplitude they can break over some of the reefs outside Hout Bay at heights of up to 70 feet 21 m making this a world class big wave break 24 25 Most of the energy of swells with a significant westerly component does not make it round the corner of Cape Point into the west side of False Bay On the same day that big waves are breaking on the west coast it may be calm enough for scuba diving from the shore in Simon s Town on the False Bay coast on the other side of the peninsula Ecology Edit Marine ecoregions of the South African Exclusive Economic Zone Table Mountain National Park Marine Protected Area spans the boundary between the Benguela ecoregion and the Agulhas ecoregion Kelp forest on a high profile inshore reef Cape Point at the tip of the Cape Peninsula is considered the boundary between two of the four inshore marine ecoregions of South Africa To the west of Cape Point is the cool to cold temperate Benguela ecoregion which extends from Cape Columbine to Cape Point and is dominated by the cold Benguela Current and the warm temperate Agulhas ecoregion to the east of Cape Point which extends eastwards to the Mbashe River The Cape Point break is considered to be a relatively distinct change in the bioregions and this can be clearly seen from the difference in the ecologies between the Atlantic seaboard of the peninsula and False Bay though there is a significant overlap of resident organisms There are a large proportion of species endemic to South Africa along this coastline 23 26 27 Habitats Edit Four major habitats types exist in the sea in this region distinguished by the nature of the substrate The substrate or base material is important in that it provides a base to which an organism can anchor itself which is vitally important for those organisms which need to stay in one particular kind of place Rocky shores and reefs provide a firm fixed substrate for the attachment of plants and animals Some of these may have kelp forests which reduce the effect of waves and provide food and shelter for an extended range of organisms Sandy beaches and bottoms are a relatively unstable substrate and cannot anchor kelp or many of the other benthic organisms Finally there is open water above the substrate and clear of the kelp forest where the organisms must drift or swim Mixed habitats are also frequently found which are a combination of those mentioned above 28 There are no significant estuarine habitats in the MPA Rocky shores and reefs Several layers of marine life may co exist in apparent harmony There are extensive rocky reefs and mixed rocky and sandy bottoms with a significant number of wrecks which are equivalent to rocky reefs for classification of habitat as in general marine organisms are not particular about the material of the substrate if the texture and strength is suitable and it is not toxic For many marine organisms the substrate is another type of marine organism and it is common for several layers to co exist Examples of this are red bait pods which are usually encrusted with sponges ascidians bryozoans anemones and gastropods and abalone which are usually covered by similar seaweeds to those found on the surrounding rocks usually with a variety of other organisms living on the seaweeds 28 Ch 2 The type of rock of the reef is of some importance as it influences the range of possibilities for the local topography which in turn influences the range of habitats provided and therefore the diversity of inhabitants Granite reefs generally have a relatively smooth surface in the centimetre to decimetre scale but are often high profile in the metre scale so they provide macro variations in habitat from relatively horizontal upper surface near vertical sides to overhangs holes and tunnels on a similar scale to the boulders and outcrops themselves There are relatively few small crevices compared to the overall surface area Sandstone and other sedimentary rocks erode and weather very differently and depending on the direction of dip and strike and steepness of the dip may produce reefs which are relatively flat to very high profile and full of small crevices These features may be at varying angles to the shoreline and wave fronts There are far fewer large holes tunnels and crevices in sandstone reefs but often many deep but low near horizontal crevices In some areas the reef is predominantly wave rounded medium to small boulders In this case the type of rock has little influence The coastline in this region was considerably lower during the most recent ice ages and the detail topography of the dive sites was largely formed during the period of exposure above sea level As a result the underwater relief is mostly very similar in character to the nearest landscape above sea level There are notable exceptions where the rock above and below the water is of a different type These are mostly in False Bay south of Smitswinkel Bay where there is a sandstone shore with granite reefs 17 Kelp forests Dense kelp forest with algal understorey Kelp forests are a variation of rocky reefs as the kelp requires a fairly strong and stable substrate which can withstand the loads of repeated waves dragging on the kelp plants The Sea bamboo Ecklonia maxima grows in water which is shallow enough to allow it to reach to the surface with its gas filled stipes so that the fronds form a dense layer at or just below the surface depending on the tide The shorter Split fan kelp Laminaria pallida grows mostly on deeper reefs where there is not so much competition from the sea bamboo Both these kelp species provide food and shelter for a variety of other organisms particularly the Sea bamboo which is a base for a wide range of epiphytes which in turn provide food and shelter for more organisms 28 Ch 4 There are also places where the spined kelp Ecklonia radiata can be found east of Cape Point and bladder kelp Macrocystis pyrifera in sheltered areas west of Cape Point often inshore of the Ecklonia forests 29 Sandy beaches and bottoms including shelly pebble and gravel bottoms Sandy bottoms at first glance appear to be fairly barren areas as they lack the stability to support many of the spectacular reef based species and the variety of large organisms is relatively low The sand is continually being moved around by wave action to a greater or lesser degree depending on weather conditions and exposure of the area This means that sessile organisms must be specifically adapted to areas of relatively loose substrate to thrive in them and the variety of species found on a sandy or gravel bottom will depend on all these factors Sandy bottoms have one important compensation for their instability animals can burrow into the sand and move up and down within its layers which can provide feeding opportunities and protection from predation Other species can dig themselves holes in which to shelter or may feed by filtering water drawn through the tunnel or by extending body parts adapted to this function into the water above the sand 28 Ch 3 The open seaThe pelagic water column is the major part of the living space at sea This is the water between the surface and the top of the benthic zone where living organisms swim float or drift and the food chain starts with phytoplankton the mostly microscopic photosynthetic organisms that convert the energy of sunlight into organic material which feeds everything else directly or indirectly In temperate seas there are distinct seasonal cycles of phytoplankton growth based on the available nutrients and the available sunlight Either can be a limiting factor Phytoplankton tend to thrive where there is plenty of light and they themselves are a major factor in restricting light penetration to greater depths so the photosynthetic zone tends to be shallower in areas of high productivity 28 Ch 6 Zooplankton feed on the phytoplankton and are in turn eaten by larger animals The larger pelagic animals are generally faster moving and more mobile giving them the option of changing depth to feed or to avoid predation and to move to other places in search of a better food supply Plankton blooms following upwelling events are a characteristic of the west side of the peninsula in particularRed tidesOn the west coast of the peninsula and to a lesser extent the east side of False Bay the south easterly winds can cause upwelling of deep cold nutrient rich waters This generally happens in summer when these winds are strongest and this in combination with the intense summer sunlight provides conditions conducive to rapid growth of phytoplankton If the upwelling is then followed by a period of light wind or onshore winds some species of phytoplankton can bloom so densely that they colour the water most noticeably a reddish or brownish colour which is known as a red tide 28 Depending on the species involved these red tides may cause mass mortalities to marine animals for various reasons In some cases the organisms may consume all the available nutrients and then die leaving decaying remains which deplete the water of oxygen asphyxiating the animal life while others may simply become so dense that they clog the gills of marine animals with similar effect A third group are inherently toxic and these may be particularly problematic as some filter feeding species are immune to the toxins but accumulate them in their tissues and will then be toxic to humans who may eat them 28 Red tides also have the effect of reducing light penetration The reduction in illumination can range from a mild effect in the surface layers to seriously reduced illunmination to considerable depth Red tides may be small and localised and usually last for a few days but in extreme cases have been known to extend from Doringbaai to Cape Agulhas several hundred kilometres to both sides of Cape Town and take weeks to disperse March 2005 Marine species diversity Edit See also Biodiversity and Marine biodiversity White sharks abalone African penguins many over exploited linefish species West coast rock lobster Besides the resident species and several known migrants the waters of the MPA are occasionally visited by vagrants carried in by the eddies of the Agulhas Current which can bring tropical and subtropical specimens normally resident thousands of kilometres away 30 Animals Edit Main article List of marine animals of the Cape Peninsula and False Bay Number of marine animal species listed by phylum 31 30 23 Poriferans 28 Cnidarians 68 Ctenophores 4 Platyhelmimthes 4 Polychaetes 15 Arthropods 89 Bryozoans 32 Molluscs 242 Brachiopods 3 Echinoderms 28 Tunicates 27 Vertebrates Fish 472 Reptiles occasional vagrant turtles Seabirds Marine mammals 10Seaweeds Edit Main article List of seaweeds of the Cape Peninsula and False Bay More than 300 species of seaweed are recorded from the Cape Peninsula and False Bay Most of these in the MPA These include kelp from three genera Ecklonia Laminaria and Macrocystis and a range of other brown green and red algae 32 29 As previously mentioned the kelp forests provide shelter for a wide range of organisms including other seaweeds which form algal turfs and understoreys and live as epiphytes on the kelp plants and other sessile organisms In the inshore shallow water Ecklonia maxima is common and the plants grow to relatively small sizes to match the water depth The waters are well illuminated and many other seaweeds live under the kelp canopy to a large extent crowding out the sessile fauna In slightly deeper water the Ecklonia reaches its maximum size and biomass per area In this zone Laminaria pallida the split fan kelp forms a secondary canopy and under this an understorey of smaller seaweeds including many species of encrusting and arborescent red seaweeds In deeper water the Ecklonia do not thrive and are taken over by Laminaria When there is insufficient light for Laminaria the algal turf is mostly red seaweeds including many varieties of corallines 28 Kelp beds are important to the life cycle of several animals The sea urchin Parechinus angulosus feeds on kelp detritus and browse the sporelings keeping the rock surfaces relatively free of young kelp plants Where there are sparse urchins the kelp can establish more easily and adult Laminaria fronds tend to sweep the underlying surfaces of some of the invertebrates which browse on the kelp On deeper reefs and on more steeply sloped rock surfaces there is less seaweed biomass as the light is insufficient 28 Endemism Edit Main article Endemism Endemism is the ecological state of a species being unique to a defined geographic location such as an island nation country or other defined zone or habitat type organisms that are indigenous to a place are not endemic to it if they are also found elsewhere The extreme opposite of endemism is cosmopolitan distribution The MPA is small and it is unlikely that there are any species endemic to only the MPA but it may be the only or largest MPA within the known range of some endemic species Some species are only recorded from the MPA but this may be an artifact of the relatively high level of research and observation in this region This section needs expansion You can help by adding to it May 2018 Invasive species Edit Main article Invasive species At least two marine species that have become truly invasive affect this MPA Carcinus maenas the European shore crab and Mytilus galloprovincialis the Mediterranean mussel 33 The main ecological effect of the Mediterranean mussel invasion has been the increase in the extent of mussel beds in the region crowding out other species which would otherwise occupy the reef surface particularly the limpet Scutellastra argenvillei The extended mussel beds also increase habitat available for infaunal species and provide more food for some species particularly the African oystercatcher Haematopus moquini 33 Threats EditThis marine protected area suffers from both large scale and small scale poaching of fish abalone and rock lobsters Of the small scale poaching there are two different main methods hand line poaching and small group poaching Hand line poaching usually consists of two people and is considered a skill Poachers know the type of fish based on the way the line is pulled Small scale poaching includes about 10 12 people fishing from boats These groups are self organized and often have informal rules governing where each group can fish Small scale poaching exposes existing issues within local communities that use the marine protected area including lack of job diversity lack of education and lack of proper enforcement 11 Poaching of abalone and lobster is prevalent and there is an additional risk that interactions with poachers can endanger staff and visitors 8 Other threats include pollutants from city rivers storm water and sewage effluent that affect water quality urban development high tourist numbers eutrophication and harmful algal blooms pressures from small scale fishers requiring greater access to marine resources and invasive alien species 6 See also Edit Marine protected areas of South Africa 34 35 Cape Peninsula Rocky peninsula in the Western Cape South Africa False Bay Large bay of the Atlantic Ocean at Cape Town South Africa Helderberg Marine Protected Area Marine conservation area in the Western Cape in South Africa List of protected areas of South Africa Areas protected for conservation in South Africa Marine biodiversity of South Africa Variety of living organisms that live in the seas off the coast of South Africa Marine protected area Protected areas of seas oceans estuaries or large lakes Marine protected areas of South Africa Protected areas of coastline or ocean in the EEZ of South Africa Robben Island Marine Protected Area Marine conservation area in South Africa Scuba diving tourism Industry based on recreational diver travel Table Mountain National Park A nature conservation area on the Cape Peninsula in Cape Town South AfricaExternal links EditTable Mountain National Parks page at SANParks website Diving the Cape Peninsula and False Bay A free recreational diving guide to the waters of the region References Edit a b c d e f g h i j Government Notice 695 Marine Living Resources Act 18 1998 Notice declaring the Table Mountain National Park Marine Protected Area under section 43 PDF Government Gazette 3 9 4 June 2004 a b c d e Table Mountain National Park MPA Forum South Africa Retrieved 26 May 2018 Table Mountain National Park A Biological Hotspot Siyabona Africa Retrieved 26 May 2018 Declaration of areas as Marine Protected Areas Government Notice R1429 in Government Gazette 21948 PDF 29 December 2000 Retrieved 19 January 2019 via Centre for Environmental Rights a b c Marine Protected Areas World Wildlife Fund Retrieved 24 May 2018 a b c d e Fielding P 2021 Marine amp Coastal Areas under Protection Republic of South Africa PDF UNEP Nairobi Convention and WIOMSA 2021 Western Indian Ocean Marine Protected Areas Outlook Towards achievement of the Global Biodiversity Framework Targets Report Nairobi Kenya UNEP and WIOMSA pp 133 166 ISBN 978 9976 5619 0 6 a b c d e f Table Mountain National Park Marine Protected Area Site description Atlas of Marine Protection Retrieved 24 May 2018 a b c d e Table Mountain National Park management and staff November 2015 Table Mountain National Park Park Management Plan 2015 2025 PDF SANParks Retrieved 26 May 2018 Chadwick Peter Duncan John Tunley Karen 2014 State of Management of South Africa s Marine Protected Areas PDF Cape Town SA World Wide Fund for Nature pp 27 33 Marine Protected Area Retrieved 26 May 2018 a b Omari Navonaeli 2007 Legal Pluralism in Environmental Management PDF University of Cape Town Department of Environmental and Geographical Sciences University of Cape Town Sowman Merle Hauck Marie van Sittert Lance Sunde Jackie 2011 04 01 Marine Protected Area Management in South Africa New Policies Old Paradigms Environmental Management 47 4 573 583 Bibcode 2011EnMan 47 573S doi 10 1007 s00267 010 9499 x PMID 20449745 S2CID 38057635 Diving the Cape Peninsula and False Bay Retrieved 8 August 2019 a b Standard positions for SeaKeys dive sites Dive sites of the Cape Town region iNaturalist org Retrieved 6 February 2019 Jordaan Nomahlubi 28 June 2019 Octopus fishing stopped in False Bay after whale deaths timeslive co za Retrieved 24 August 2020 Hudson Pippa New rules for octopus fishing in False Bay following whale deaths Retrieved 24 August 2020 a b c d e f g Compton John S 2004 The Rocks amp Mountains of Cape Town Cape Town Double Story ISBN 978 1 919930 70 1 Theron J N Gresse P G Siegfried H P Rogers J 1992 Explanation sheet 3318 The Geology of the Cape Town Area Pretoria Geological Survey Department of Mineral and Energy Affairs Government Printer ISBN 978 0 621 14284 6 Terhorst A July 1988 The seafloor environment off Simon s Town in False Bay revealed by side scan sonar bottom sampling diver observations and underwater photography Bulletin No 22 Report Department of Geology University of Cape Town a b Coleman Fawaaz April 2019 The Development and Validation of a Hydrodynamic Model of False Bay Thesis University of Stellenbosch a b Garmin Mapsource BlueChart Atlantic V5 Map Garmin 2003 Pfaff Maya C Logston Renae C Raemaekers Serge J P N Hermes Juliet C Blamey Laura K Cawthra Hayley C Colenbrander Darryl R Crawford Robert J M Day Elizabeth du Plessis Nicole Elwen Simon H Fawcett Sarah E Jury Mark R Karenyi Natasha Kerwath Sven E Kock Alison A Krug Marjolaine Lamberth Stephen J Omardien Aaniyah Pitcher Grant C Rautenbach Christo Robinson Tamara B Rouault Mathieu Ryan Peter G Shillington Frank A Sowman Merle Sparks Conrad C Turpie Jane K van Niekerk Lara Waldron Howard N Yeld Eleanor M Kirkman Stephen P 2019 A synthesis of three decades of socio ecological change in False Bay South Africa setting the scene for multidisciplinary research and management Elementa Science of the Anthropocene 7 32 doi 10 1525 elementa 367 Creative Commons Attribution 4 0 International License CC BY 4 0 a b c d Jones Georgina 2008 A field guide to the marine animals of the Cape Peninsula Cape Town SURG ISBN 978 0 620 41639 9 Dungeons Reef Cape Town Spot Check www zigzag co za 12 August 2010 Retrieved 3 June 2019 South Africa s Dungeons surf spot unleashes world class waves www brandsouthafrica com 5 September 2016 Retrieved 3 June 2019 Sink K Harris J Lombard A October 2004 Appendix 1 South African marine bioregions PDF South African National Spatial Biodiversity Assessment 2004 Technical Report Vol 4 Marine Component DRAFT Report pp 97 109 Sink K Holness S Harris L Majiedt P Atkinson L Robinson T Kirkman S Hutchings L Leslie R Lamberth S Kerwath S von der Heyden S Lombard A Attwood C Branch G Fairweather T Taljaard S Weerts S Cowley P Awad A Halpern B Grantham H Wolf T 2012 National Biodiversity Assessment 2011 Technical Report PDF Report Vol 4 Marine and Coastal Component Pretoria South African National Biodiversity Institute p 325 Note This is the full document with numbered pages a b c d e f g h i Branch G M Branch M L 1985 The Living Shores of Southern Africa 3rd impression ed Cape Town C Struik ISBN 0 86977 115 9 a b Branch G M Branch M L Griffiths C L Beckley L E 2010 Two Oceans a guide to the marine life of southern Africa 2nd ed Cape Town Struik Nature ISBN 978 1 77007 772 0 a b Zsilavecz Guido 2005 Coastal fishes of the Cape Peninsula and False Bay A divers identification guide Cape Town SURG ISBN 0 620 34230 7 Zsilavecz Guido 2007 Nudibranchs of the Cape Peninsula and False Bay Cape Town SURG ISBN 978 0 620 38054 6 Stegenga H Bolton J J Anderson R J 1997 Seaweeds of the South African West Coast Contributions from the Bolus Herbarium University of Cape Town ISBN 0 7992 1793 X a b Sink K October 2004 Appendix 2 Threats affecting marine biodiversity in South Africa PDF South African National Spatial Biodiversity Assessment 2004 Technical Report Vol 4 Marine Component DRAFT Report pp 97 109 MPA Declarations PDF Regulation Gazette No 42478 Pretoria Government Printer 647 10177 23 May 2019 Protected Areas Register dffeportal environment gov za Retrieved 10 July 2022 Retrieved from https en wikipedia org w index php title Table Mountain National Park Marine Protected Area amp oldid 1097385782, wikipedia, wiki, book, books, library,

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