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

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https://ir.library.oregonstate.edu/concern/articles/df65v966w

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Abstract
  • 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 SES[subscript MPD] and SES[subscript MNTD]. 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.
  • This is the publisher’s final pdf. The published article is copyrighted by the Ecological Society of America and can be found at: http://www.esajournals.org/loi/ecol.
  • Keywords: Spatial scale, Community assembly, Competition, Ecophylogenetics, Facilitation, Janzen-Connell effects, Habitat filtering, Phylogenetic scale, Community ecology, Community phylogenetics, Tropical forest, Barro Colorado Island, Panama
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  • William D. Pearse, F. Andrew Jones, and Andy Purvis 2013. Barro Colorado Island's phylogenetic assemblage structure across fine spatial scales and among clades of different ages. Ecology 94:2861–2872. doi:10.1890/12-1676.1
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  • 94
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  • 12
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Funding Statement (additional comments about funding)
  • W. D. Pearse wassupported by a CASE Ph.D studentship from NERC. The BCIforest dynamics research project was made possible by NationalScience Foundation grants to Stephen P. Hubbell: DEB-0640386, DEB-0425651, DEB-0346488, DEB-0129874, DEB-00753102, DEB-9909347, DEB-9615226, DEB-9615226, DEB-9405933, DEB-9221033, DEB-9100058, DEB-8906869, DEB-8605042, DEB-8206992, DEB-7922197, support from theCenter for Tropical Forest Science, the Smithsonian TropicalResearch Institute, the John D. and Catherine T. MacArthurFoundation, the Mellon Foundation, the Celera Foundation,and numerous private individuals, and through the hard workof over 100 people from 10 countries over the past two decades.
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