Phylogenetic diversity is a measure of biodiversity which incorporates phylogenetic difference between species. It is defined and calculated as "the sum of the lengths of all those branches that are members of the corresponding minimum spanning path",[1] in which 'branch' is a segment of a cladogram, and the minimum spanning path is the minimum distance between the two nodes.
The two species of tuatara are separated from all other species by over 200 million years
This definition is distinct from earlier measures which attempted to incorporate phylogenetic diversity into conservation planning, such as the measure of 'taxic diversity' introduced by Vane-Wright, Humphries, and William.[2]
The concept of phylogenetic diversity has been rapidly adopted in conservation planning, with programs such as the Zoological Society of London's EDGE of Existence programme focused on evolutionary distinct species. Similarly, the WWF's Global 200 also includes unusual evolutionary phenomena in their criteria for selecting target ecoregions.
Some studies have indicated that alpha diversity is a good proxy for phylogenetic diversity, so suggesting that term has little use,[3] but a study in the Cape Floristic Region showed that while phylogenetic and species/genus diversity are very strongly correlated (R2 = 0.77 and 0.96, respectively), using phylogenetic diversity led to selection of different conservation priorities than using species richness. It also demonstrated that PD led to greater preservation of 'feature diversity' than species richness alone.[4]
^Vane-Wright, R. I., Humphries, C. J. & Williams, P. H. 1991. (1991). What to protect - systematics and the agony of choice. Biological Conservation, 55, 235-54.
^Rodrigues, A. S. L. & Gaston, K. J. 2002. Maximising phylogenetic diversity in the selection of networks of conservation areas. Biol. Conserv. 105, 103–111|
phylogenetic, diversity, measure, biodiversity, which, incorporates, phylogenetic, difference, between, species, defined, calculated, lengths, those, branches, that, members, corresponding, minimum, spanning, path, which, branch, segment, cladogram, minimum, s. Phylogenetic diversity is a measure of biodiversity which incorporates phylogenetic difference between species It is defined and calculated as the sum of the lengths of all those branches that are members of the corresponding minimum spanning path 1 in which branch is a segment of a cladogram and the minimum spanning path is the minimum distance between the two nodes The two species of tuatara are separated from all other species by over 200 million yearsThis definition is distinct from earlier measures which attempted to incorporate phylogenetic diversity into conservation planning such as the measure of taxic diversity introduced by Vane Wright Humphries and William 2 The concept of phylogenetic diversity has been rapidly adopted in conservation planning with programs such as the Zoological Society of London s EDGE of Existence programme focused on evolutionary distinct species Similarly the WWF s Global 200 also includes unusual evolutionary phenomena in their criteria for selecting target ecoregions Some studies have indicated that alpha diversity is a good proxy for phylogenetic diversity so suggesting that term has little use 3 but a study in the Cape Floristic Region showed that while phylogenetic and species genus diversity are very strongly correlated R2 0 77 and 0 96 respectively using phylogenetic diversity led to selection of different conservation priorities than using species richness It also demonstrated that PD led to greater preservation of feature diversity than species richness alone 4 References edit DP Faith 1992 Conservation evaluation and phylogenetic diversity Biological Conservation 61 1 10 Vane Wright R I Humphries C J amp Williams P H 1991 1991 What to protect systematics and the agony of choice Biological Conservation 55 235 54 Rodrigues A S L amp Gaston K J 2002 Maximising phylogenetic diversity in the selection of networks of conservation areas Biol Conserv 105 103 111 Forest F et al 2007 Preserving the evolutionary potential of floras in biodiversity hotspots Nature 445 757 760 http www nature com nature journal v445 n7129 full nature05587 html Retrieved from https en wikipedia org w index php title Phylogenetic diversity amp oldid 1009586667, wikipedia, wiki, book, books, library,
