The decline of the Colombian grebe is attributed to wetland drainage, siltation, pesticide pollution, disruption by reed harvesting, hunting, competition, and predation of chicks by rainbow trout (Oncorhynchus mykiss).[3] The primary reason was loss of habitat: drainage of wetlands and siltation resulted in higher concentrations of pollutants, causing eutrophication across Lake Tota. This destroyed the open, submergent pondweed (Potamogeton) vegetation and resulted in the formation of a dense monoculture of water weed (Elodea).[4]
By 1968, the species had declined to approximately 300 birds. Only two records of this bird were made in the 1970s; one seen 1972, and the last confirmed record from 1977 when three birds were seen. Intensive studies in 1981 and 1982 failed to find the species and it is now considered extinct.[5]
Referencesedit
^BirdLife International (2016). "Podiceps andinus". IUCN Red List of Threatened Species. 2016: e.T22696615A93574182. doi:10.2305/IUCN.UK.2016-3.RLTS.T22696615A93574182.en. Retrieved 12 November 2021.
^Roots, C. 2006. Flightless Birds. Santa Barbara: Greenwood Publishing Group.
colombian, grebe, podiceps, andinus, grebe, found, bogotá, wetlands, bogotá, savanna, eastern, ranges, andes, colombia, species, still, abundant, lake, tota, 1945, species, occasionally, been, considered, subspecies, black, necked, grebe, nigricollis, flightle. The Colombian grebe Podiceps andinus was a grebe found in the Bogota wetlands on the Bogota savanna in the Eastern Ranges of the Andes of Colombia The species was still abundant in Lake Tota in 1945 The species has occasionally been considered a subspecies of black necked grebe P nigricollis It was flightless 2 Colombian grebe Conservation status Extinct 1977 IUCN 3 1 1 Scientific classification Domain Eukaryota Kingdom Animalia Phylum Chordata Class Aves Order Podicipediformes Family Podicipedidae Genus Podiceps Species P andinus Binomial name Podiceps andinus Meyer de Schauensee 1959 The decline of the Colombian grebe is attributed to wetland drainage siltation pesticide pollution disruption by reed harvesting hunting competition and predation of chicks by rainbow trout Oncorhynchus mykiss 3 The primary reason was loss of habitat drainage of wetlands and siltation resulted in higher concentrations of pollutants causing eutrophication across Lake Tota This destroyed the open submergent pondweed Potamogeton vegetation and resulted in the formation of a dense monoculture of water weed Elodea 4 By 1968 the species had declined to approximately 300 birds Only two records of this bird were made in the 1970s one seen 1972 and the last confirmed record from 1977 when three birds were seen Intensive studies in 1981 and 1982 failed to find the species and it is now considered extinct 5 References edit BirdLife International 2016 Podiceps andinus IUCN Red List of Threatened Species 2016 e T22696615A93574182 doi 10 2305 IUCN UK 2016 3 RLTS T22696615A93574182 en Retrieved 12 November 2021 Roots C 2006 Flightless Birds Santa Barbara Greenwood Publishing Group del Hoyo et al 1992 Varty et al 1986 Fjeldsa 1993 as cited in O Donnel and Fjeldsa 1997 in Spanish El Pato Zambullidor extinto de ColombiaExternal links edit nbsp Andes portal BirdLife Species Factsheet nbsp This Podicipediformes related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Colombian grebe amp oldid 1220693657, wikipedia, wiki, book, books, library,
