Document Detail

Density-dependent diversification in North American wood warblers.
MedLine Citation:
PMID:  18611849     Owner:  NLM     Status:  MEDLINE    
Evidence from both molecular phylogenies and the fossil record suggests that rates of species diversification often decline through time during evolutionary radiations. One proposed explanation for this pattern is ecological opportunity, whereby an initial abundance of resources and lack of potential competitors facilitate rapid diversification. This model predicts density-dependent declines in diversification rates, but has not been formally tested in any species-level radiation. Here we develop a new conceptual framework that distinguishes density dependence from alternative processes that also produce temporally declining diversification, and we demonstrate this approach using a new phylogeny of North American Dendroica wood warblers. We show that explosive lineage accumulation early in the history of this avian radiation is best explained by a density-dependent diversification process. Our results suggest that the tempo of wood warbler diversification was mediated by ecological interactions among species and that lineage and ecological diversification in this group are coupled, as predicted under the ecological opportunity model.
Daniel L Rabosky; Irby J Lovette
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Proceedings. Biological sciences / The Royal Society     Volume:  275     ISSN:  0962-8452     ISO Abbreviation:  Proc. Biol. Sci.     Publication Date:  2008 Oct 
Date Detail:
Created Date:  2008-09-10     Completed Date:  2008-11-18     Revised Date:  2013-06-05    
Medline Journal Info:
Nlm Unique ID:  101245157     Medline TA:  Proc Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  2363-71     Citation Subset:  IM    
Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY 14853, USA.
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MeSH Terms
DNA, Mitochondrial / chemistry,  genetics
Evolution, Molecular*
Genetic Speciation*
Mitochondrial Proteins / chemistry,  genetics
Models, Genetic*
Nuclear Proteins / chemistry,  genetics
Polymerase Chain Reaction
Population Density*
Sequence Analysis, Protein
Songbirds / genetics*
Reg. No./Substance:
0/DNA, Mitochondrial; 0/Mitochondrial Proteins; 0/Nuclear Proteins
Comment In:
Proc Biol Sci. 2009 Mar 22;276(1659):993-4; discussion 995-7   [PMID:  19129112 ]

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