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Barro Colorado Island's phylogenetic assemblage structure across fine spatial scales and among clades of different ages

Pearse, William D.; Jones, F. Andrew; Purvis, Andy. 2013 Barro Colorado Island's phylogenetic assemblage structure across fine spatial scales and among clades of different ages. Ecology, 94 (12). 2861-2872. 10.1890/12-1676.1

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Abstract/Summary

Phylogenetic analyses of assemblage membership provide insight into how ecological communities are structured. However, despite the scale-dependency of many ecological processes, little is known about how assemblage and source pool size definitions can be altered, either alone or together, to provide insight into how ecological diversity is maintained. Moreover, although studies have acknowledged that different clades within an assemblage may be structured by different forces, there has been no attempt to relate the age of a clade to its community phylogenetic structure. Using assemblage phylogenies and spatially explicit data for trees from Barro Colorado Island (BCI), we show that larger assemblages, and assemblages with larger source pools, are more phylogenetically clustered. We argue that this reflects competition, the influence of pathogens, and chance assembly at smaller spatial scales, all operating within the context of wider-scale habitat filtering. A community phylogenetic measure that is based on a null model derived explicitly from trait evolution theory, D, is better able to detect these differences than commonly used measures such as SESMPD and SESMNTD. We also detect a moderate tendency for stronger phylogenetic clustering in younger clades, which suggests that coarse analyses of diverse assemblages may be missing important variation among clades. Our results emphasize the importance of spatial and phylogenetic scale in community phylogenetics and show how varying these scales can help to untangle complex assembly processes

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1890/12-1676.1
CEH Sections: Pywell
ISSN: 0012-9658
Additional Keywords: Barro Colorado Island, Panama, community assembly, community ecology, community phylogenetics, competition, ecophylogenetics, facilitation, habitat filtering, Janzen-Connell effects, phylogenetic scale, spatial scale, trtopical forest
NORA Subject Terms: Ecology and Environment
Date made live: 24 Mar 2014 10:07 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/506433

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