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The role of clade competition in the diversification of North American canids

Daniele Silvestro, Alexandre Antonelli, Nicolas Salamin, and Tiago B. Quental
PNAS published ahead of print June 29, 2015 https://doi.org/10.1073/pnas.1502803112
Daniele Silvestro
aDepartment of Biological and Environmental Sciences, University of Gothenburg, 413 19 Gothenburg, Sweden;bDepartment of Ecology and Evolution, University of Lausanne, 1015 Lausanne, Switzerland;cSwiss Institute of Bioinformatics, Quartier Sorge, 1015 Lausanne, Switzerland;
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  • ORCID record for Daniele Silvestro
  • For correspondence: silvestro.daniele@gmail.comtbquental@usp.br
Alexandre Antonelli
aDepartment of Biological and Environmental Sciences, University of Gothenburg, 413 19 Gothenburg, Sweden;dGothenburg Botanical Garden, 413 19 Gothenburg, Sweden;
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Nicolas Salamin
bDepartment of Ecology and Evolution, University of Lausanne, 1015 Lausanne, Switzerland;cSwiss Institute of Bioinformatics, Quartier Sorge, 1015 Lausanne, Switzerland;
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Tiago B. Quental
eDepartamento de Ecologia, Universidade de São Paulo, 05508-900, São Paulo, SP, Brazil, 05508-900
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  • For correspondence: silvestro.daniele@gmail.comtbquental@usp.br
  1. Edited by Mike Foote, The University of Chicago, Chicago, IL, and accepted by the Editorial Board May 30, 2015 (received for review February 10, 2015)

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Significance

Extinction is a ubiquitous feature of biodiversity history, and although many lineages increase in diversity through time, most of them eventually decline and get replaced. Dinosaurs and mammals represent an extreme and iconic example of such replacement. Here we investigate the causes of the sequential wax and wane of three subfamilies in the dog family Canidae. Contrary to current expectation, we find that competition from phylogenetically distant, but ecologically similar, clades played a more substantial role in canid diversification than climate change and body size evolution. Our results provide novel quantitative evidence indicating that competition from multiple clades can actively drive the displacement and extinction of entire lineages.

Abstract

The history of biodiversity is characterized by a continual replacement of branches in the tree of life. The rise and demise of these branches (clades) are ultimately determined by changes in speciation and extinction rates, often interpreted as a response to varying abiotic and biotic factors. However, understanding the relative importance of these factors remains a major challenge in evolutionary biology. Here we analyze the rich North American fossil record of the dog family Canidae and of other carnivores to tease apart the roles of competition, body size evolution, and climate change on the sequential replacement of three canid subfamilies (two of which have gone extinct). We develop a novel Bayesian analytic framework to show that competition from multiple carnivore clades successively drove the demise and replacement of the two extinct canid subfamilies by increasing their extinction rates and suppressing their speciation. Competitive effects have likely come from ecologically similar species from both canid and felid clades. These results imply that competition among entire clades, generally considered a rare process, can play a more substantial role than climate change and body size evolution in determining the sequential rise and decline of clades.

  • mammals
  • speciation
  • extinction
  • macroevolution
  • fossils

Footnotes

  • ↵1To whom correspondence may be addressed. Email: silvestro.daniele{at}gmail.com or tbquental{at}usp.br.
  • Author contributions: D.S., A.A., N.S., and T.B.Q. designed research; D.S. and T.B.Q. performed research; D.S. and T.B.Q. analyzed data; and D.S., A.A., N.S., and T.B.Q. wrote the paper.

  • The authors declare no conflict of interest.

  • This article is a PNAS Direct Submission. M.F. is a guest editor invited by the Editorial Board.

  • This article contains supporting information online at www.pnas.org/lookup/suppl/doi:10.1073/pnas.1502803112/-/DCSupplemental.

Freely available online through the PNAS open access option.

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Clade competition in North American canids
Daniele Silvestro, Alexandre Antonelli, Nicolas Salamin, Tiago B. Quental
Proceedings of the National Academy of Sciences Jun 2015, 201502803; DOI: 10.1073/pnas.1502803112

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Clade competition in North American canids
Daniele Silvestro, Alexandre Antonelli, Nicolas Salamin, Tiago B. Quental
Proceedings of the National Academy of Sciences Jun 2015, 201502803; DOI: 10.1073/pnas.1502803112
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