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Backbones of evolutionary history test biodiversity theory for microbes

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https://ir.library.oregonstate.edu/concern/articles/kd17cv554

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  • Identifying the ecological and evolutionary mechanisms that determine biological diversity is a central question in ecology. In microbial ecology, phylogenetic diversity is an increasingly common and relevant means of quantifying community diversity, particularly given the challenges in defining unambiguous species units from environmental sequence data. We explore patterns of phylogenetic diversity across multiple bacterial communities drawn from different habitats and compare these data to evolutionary trees generated using theoretical models of biodiversity. We have two central findings. First, although on finer scales the empirical trees are highly idiosyncratic, on coarse scales the backbone of these trees is simple and robust, consistent across habitats, and displays bursts of diversification dotted throughout. Second, we find that these data demonstrate a clear departure from the predictions of standard neutral theories of biodiversity and that an alternative family of generalized models provides a qualitatively better description. Together, these results lay the groundwork for a theoretical framework to connect ecological mechanisms to observed phylogenetic patterns in microbial communities.
  • Freely available online through the PNAS open access option. This is the publisher’s final pdf. The published article is copyrighted by the author(s) and published by the National Academy of Sciences. The published article can be found at: http://www.pnas.org/
  • Keywords: coalescent theory, macroecology, phylogeny, microbial biodiversity
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  • O’Dwyer, J. P., Kembel, S. W., & Sharpton, T. J. (2015). Backbones of evolutionary history test biodiversity theory for microbes. Proceedings of the National Academy of Sciences, 112(27), 8356-8361. doi:10.1073/pnas.1419341112
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  • 112
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  • 27
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  • J.P.O. acknowledges support from the Templeton World Charity Foundation Grant TWCF0079/AB47. S.W.K. was supported by the Canada Research Chairs program and the Natural Sciences and Engineering Research Council of Canada. T.J.S. acknowledges support from the Gordon & Betty Moore Foundation (Grant 3300).
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file details SharptonThomasMicrobiologyBackbonesEvolutionaryHistory(IncludesCorrection).pdf 07/26/2017 Öffentlich
file details SharptonThomasMicrobiologyBackbonesEvolutionaryHistory(SupplementaryMaterial).pdf 07/26/2017 Öffentlich