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Toward a paradigm shift in comparative phylogeography driven by trait-based hypotheses.

Anna Papadopoulou1, L Lacey Knowles2

  • 1Department of Ecology and Evolutionary Biology, Museum of Zoology, University of Michigan, Ann Arbor, MI 48109; Department of Integrative Ecology, Estación Biológica de Doñana, Consejo Superior de Investigaciones Cientificas, 41092 Seville, Spain.

Proceedings of the National Academy of Sciences of the United States of America
|July 20, 2016
PubMed
Summary

Comparative phylogeography needs a paradigm shift beyond the concordance criterion. Focusing on taxon-specific traits offers better insights into genetic structure and species responses to environmental changes.

Keywords:
Pleistocenebiogeographycoalescent modelingecological traitsstatistical phylogeography

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Area of Science:

  • Evolutionary Biology
  • Genetics
  • Biogeography

Background:

  • Comparative phylogeography traditionally uses the concordance criterion to infer historical biogeographic processes.
  • Over-reliance on concordance may bias understanding by underestimating biotic/intrinsic factors influencing genetic structure.
  • Discordant patterns are often attributed to historical anomalies, limiting predictive power.

Purpose of the Study:

  • Advocate for a paradigm shift in comparative phylogeography.
  • Promote methods that extract biotic/intrinsic contributions to genetic variation.
  • Emphasize taxon-specific traits for improved hypothesis testing and prediction.

Main Methods:

  • Review of current practices in comparative phylogeography.
  • Discussion of limitations of the concordance criterion with increasing genomic data resolution.
  • Proposal of trait-based hypothesis frameworks and model-based approaches.

Main Results:

  • The concordance criterion's utility is limited, especially with high-resolution genomic data.
  • Taxon-specific traits are crucial for predicting phylogeographic concordance or discordance.
  • Refined, trait-based hypotheses enhance predictive frameworks for species' responses to environmental change.

Conclusions:

  • A paradigm shift towards trait-based phylogeography is necessary.
  • Integrating taxon-specific traits improves understanding of genetic structure and evolutionary processes.
  • This approach offers better predictions for species' adaptation and biogeographic history.