手法を比較

	Faith's Phylogenetic Diversity	種蓄積曲線 (Species Accumulation Curve)
分野	生態学	生態学
系統	Process / pipeline	Process / pipeline
提唱年	1992	1968
提唱者	David Faith	Henry Sanders
種類	evolutionary diversity quantification	biodiversity quantification and comparison
原典	Faith, D. P. (1992). Conservation evaluation and phylogenetic diversity. Biological Conservation, 61(1), 1-10.	Colwell, R. K. (1994). Estimating terrestrial biodiversity through extrapolation. Philosophical Transactions of the Royal Society B, 345(1311), 101-118.
別名	phylogenetic diversity, PD, evolutionary distinctiveness, branch length	rarefaction, species accumulation curve, species richness curve
関連	4	4
概要	Faith's Phylogenetic Diversity (PD), introduced by David Faith (1992), measures the evolutionary diversity within a community by summing the branch lengths of a phylogenetic tree connecting all species. Unlike species richness, which counts species equally regardless of evolutionary relationships, PD weights species by their evolutionary distinctiveness: a community with evolutionarily distant species has higher PD than one dominated by recently diverged species. PD is widely used in conservation to prioritize protection of species and habitats that preserve evolutionary history.	Species accumulation curves describe how the number of observed species increases with cumulative sampling effort. Introduced by Sanders (1968) and developed by Colwell and colleagues, this method enables ecologists to compare biodiversity across sites and estimate total species richness despite incomplete sampling. It addresses a fundamental challenge in ecology: observed species counts are biased by sampling intensity.