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Testing the role of ecology and life history in structuring genetic variation across a landscape: a trait-based phylogeographic approach. | LitMetric

AI Article Synopsis

  • Traditional explanations for differences in genetic variation among species often focus on geographic features, but they might not fully account for how an organism's unique traits influence these patterns.
  • In a study of frog communities in Panama, researchers analyzed genetic variations using mitochondrial DNA sequences and found that factors like body size, landscape resistance, geographic range, and reproductive mode significantly impacted genetic divergence.
  • The findings suggest that understanding genetic variation requires considering both ecological factors and organism characteristics, leading to a new framework called trait-based phylogeography.

Article Abstract

Hypotheses to explain phylogeographic structure traditionally invoke geographic features, but often fail to provide a general explanation for spatial patterns of genetic variation. Organisms' intrinsic characteristics might play more important roles than landscape features in determining phylogeographic structure. We developed a novel comparative approach to explore the role of ecological and life-history variables in determining spatial genetic variation and tested it on frog communities in Panama. We quantified spatial genetic variation within 31 anuran species based on mitochondrial DNA sequences, for which hierarchical approximate Bayesian computation analyses rejected simultaneous divergence over a common landscape. Regressing ecological variables, on genetic divergence allowed us to test the importance of individual variables revealing that body size, current landscape resistance, geographic range, biogeographic origin and reproductive mode were significant predictors of spatial genetic variation. Our results support the idea that phylogeographic structure represents the outcome of an interaction between organisms and their environment, and suggest a conceptual integration we refer to as trait-based phylogeography.

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Source
http://dx.doi.org/10.1111/mec.13275DOI Listing

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