手法を比較

	種蓄積曲線 (Species Accumulation Curve)	Faith's Phylogenetic Diversity
分野	生態学	生態学
系統	Process / pipeline	Process / pipeline
提唱年	1968	1992
提唱者	Henry Sanders	David Faith
種類	biodiversity quantification and comparison	evolutionary diversity quantification
原典	Colwell, R. K. (1994). Estimating terrestrial biodiversity through extrapolation. Philosophical Transactions of the Royal Society B, 345(1311), 101-118.	Faith, D. P. (1992). Conservation evaluation and phylogenetic diversity. Biological Conservation, 61(1), 1-10.
別名	rarefaction, species accumulation curve, species richness curve	phylogenetic diversity, PD, evolutionary distinctiveness, branch length
関連	4	4
概要	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.	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.