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Contemporary changes in phenotypic variation, and the potential consequences for eco-evolutionary dynamics.

Sarah Sanderson1, Daniel I Bolnick2, Michael T Kinnison3

  • 1Department of Biology and Redpath Museum, McGill University, Montréal, Québec, Canada.

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Summary

Contemporary populations show small changes in trait variation, but some disturbances and trait types cause significant shifts. Understanding these changes is crucial for eco-evolutionary dynamics.

Keywords:
coefficient of variationeco-evolutionary dynamicshuman disturbancesnatural populationsphenotypic changevariation

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Area of Science:

  • Evolutionary Biology
  • Ecology
  • Population Genetics

Background:

  • Most research on phenotypic change focuses on population means, neglecting trait variation.
  • Eco-evolutionary dynamics may be significantly influenced by changes in trait variation, a factor often overlooked.
  • This study comprehensively analyzes contemporary changes in population phenotypic variation.

Discussion:

  • Compares changes in trait variances to changes in trait means across diverse populations.
  • Investigates the differential impacts of various human disturbances on trait variance.
  • Examines how different trait types influence changes in phenotypic variation.

Key Insights:

  • Changes in phenotypic variation are generally small but can be substantial under specific disturbances or for certain trait types.
  • Found that studies incorporating a genetic basis for trait change do not necessarily show different patterns than those without.
  • Highlights the importance of considering trait variation alongside trait means in eco-evolutionary studies.

Outlook:

  • Emphasizes the need to integrate changes in trait variation into eco-evolutionary models.
  • Suggests future research should focus on the mechanisms driving large shifts in phenotypic variation.
  • Provides a framework for understanding the broader implications of altered phenotypic variation in ecological contexts.