We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Characterizing the phylogenetic structure of communities by an additive partitioning of phylogenetic diversity.
- Authors
Hardy, Olivier J.; Senterre, Bruno
- Abstract
1 Analysing the phylogenetic structure of natural communities may illuminate the processes governing the assembly and coexistence of species in ecological communities. 2 Unifying previous works, we present a statistical framework to quantify the phylogenetic structure of communities in terms of average divergence time between pairs of individuals or species, sampled from different sites. This framework allows an additive partitioning of the phylogenetic signal into alpha (within-site) and beta (among-site) components, and is closely linked to Simpson diversity. It unifies the treatment of intraspecific (genetic) and interspecific diversity, leading to the definition of differentiation coefficients among community samples (e.g. IST, PST) analogous to classical population genetics coefficients expressing differentiation among populations (e.g. FST, NST). 3 Two coefficients which express community differentiation among sites from species identity ( IST) or species phylogeny ( PST) require abundance data (number of individuals per species per site), and estimators that are unbiased with respect to sample size are given. Another coefficient (ΠST) expresses the gain of the mean phylogenetic distance between species found in different sites compared with species found within sites, and requires only incidence data (presence/absence of each species in each site). 4 We present tests based on phylogenetic tree randomizations to detect community phylogenetic clustering ( PST > IST or ΠST > 0) or phylogenetic overdispersion ( PST < IST or ΠST < 0). In addition, we propose a novel approach to detect phylogenetic clustering or overdispersion in different clades or at different evolutionary time depths using partial randomizations. 5 IST, PST or Π...
- Subjects
POPULATION genetics; PHYLOGENY; BIOTIC communities; PLANT communities; PLANT ecology; CHEMOTAXONOMY; ALGAL communities; ECOLOGICAL regions; POPULATION biology
- Publication
Journal of Ecology, 2007, Vol 95, Issue 3, p493
- ISSN
0022-0477
- Publication type
Article
- DOI
10.1111/j.1365-2745.2007.01222.x