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Competition both drives and impedes diversification in a model adaptive radiation.
Bailey, Susan F; Dettman, Jeremy R; Rainey, Paul B; Kassen, Rees.
  • Bailey SF; Department of Biology, University of Ottawa, 30 Marie Curie Private, Ottawa, Ontario, Canada. susan.bailey@uottawa.ca
Proc Biol Sci ; 280(1766): 20131253, 2013 Sep 07.
Article en En | MEDLINE | ID: mdl-23843392
ABSTRACT
Competitors are known to be important in governing the outcome of evolutionary diversification during an adaptive radiation, but the precise mechanisms by which they exert their effects remain elusive. Using the model adaptive radiation of Pseudomonas fluorescens, we show experimentally that the effect of competition on diversification of a focal lineage depends on both the strength of competition and the ability of the competitors to diversify. We provide evidence that the extent of diversification in the absence of interspecific competitors depends on the strength of resource competition. We also show that the presence of competitors can actually increase diversity by increasing interspecific resource competition. Competitors that themselves are able to diversify prevent diversification of the focal lineage by removing otherwise available ecological opportunities. These results suggest that the progress of an adaptive radiation depends ultimately on the strength of resource competition, an effect that can be exaggerated or impeded by the presence of competitors.
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Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Pseudomonas fluorescens / Adaptación Fisiológica Idioma: En Año: 2013 Tipo del documento: Article

Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Pseudomonas fluorescens / Adaptación Fisiológica Idioma: En Año: 2013 Tipo del documento: Article