Empirical phylogenies and species abundance distributions are consistent with pre-equilibrium dynamics of neutral community models with gene flow
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ArticleKAUST Department
Biological and Environmental Sciences and Engineering (BESE) DivisionIntegrative Systems Biology Lab
Date
2017-05-04Online Publication Date
2017-05-04Print Publication Date
2017-05Permanent link to this record
http://hdl.handle.net/10754/623082
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Community characteristics reflect past ecological and evolutionary dynamics. Here, we investigate whether it is possible to obtain realistically shaped modelled communities - i.e., with phylogenetic trees and species abundance distributions shaped similarly to typical empirical bird and mammal communities - from neutral community models. To test the effect of gene flow, we contrasted two spatially explicit individual-based neutral models: one with protracted speciation, delayed by gene flow, and one with point mutation speciation, unaffected by gene flow. The former produced more realistic communities (shape of phylogenetic tree and species-abundance distribution), consistent with gene flow being a key process in macro-evolutionary dynamics. Earlier models struggled to capture the empirically observed branching tempo in phylogenetic trees, as measured by the gamma statistic. We show that the low gamma values typical of empirical trees can be obtained in models with protracted speciation, in pre-equilibrium communities developing from an initially abundant and widespread species. This was even more so in communities sampled incompletely, particularly if the unknown species are the youngest. Overall, our results demonstrate that the characteristics of empirical communities that we have studied can, to a large extent, be explained through a purely neutral model under pre-equilibrium conditions. This article is protected by copyright. All rights reserved.Citation
Bonnet-Lebrun A-S, Manica A, Eriksson A, Rodrigues ASL (2017) Empirical phylogenies and species abundance distributions are consistent with pre-equilibrium dynamics of neutral community models with gene flow. Evolution. Available: http://dx.doi.org/10.1111/evo.13228.Sponsors
We are grateful to F. Laroche and F. Jabot for very constructive discussions and to O. Gimenez for technical support. We also thank J. Rosindell, A. Hurlbert and two other (anonymous) referees for constructive comments that much contributed to improving the manuscript.Publisher
WileyJournal
EvolutionAdditional Links
http://onlinelibrary.wiley.com/doi/10.1111/evo.13228/abstractRelations
Is Supplemented By:- [Dataset]
Bonnet-Lebrun, A.-S., Manica, A., Eriksson, A., Rodrigues, A. S. L., & Rodrigues, A. S. L. (2017). Data from: Empirical phylogenies and species abundance distributions are consistent with pre-equilibrium dynamics of neutral community models with gene flow (Version 1) [Data set]. Dryad. https://doi.org/10.5061/DRYAD.98283. DOI: 10.5061/dryad.98283 Handle: 10754/663711
ae974a485f413a2113503eed53cd6c53
10.1111/evo.13228