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Author Spotlight: Understanding Microbe Adaptation Using Innovative Techniques for Exploring Thermophilic Evolution
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Thermal niche evolution across replicated Anolis lizard adaptive radiations.

Alex R Gunderson1, D Luke Mahler2, Manuel Leal3

  • 1Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720-3140, USA alexrgunderson@gmail.com.

Proceedings. Biological Sciences
|April 20, 2018
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Summary

Physiological evolution in Anolis lizards repeatedly drives performance and coexistence. Divergent thermal physiology, alongside morphology, promotes biodiversity in these adaptive radiations.

Keywords:
evolutionary ratesphysiologysympatrythermal biologythermal performancethermal tolerance

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Area of Science:

  • Evolutionary Ecology
  • Herpetology
  • Biodiversity Research

Background:

  • Understanding biodiversity drivers is key in evolutionary ecology.
  • Anolis lizards exhibit resource partitioning via morphological divergence.
  • The role of physiological evolution in species coexistence is understudied.

Purpose of the Study:

  • Investigate how physiological evolution impacts performance and species coexistence in Anolis lizards.
  • Examine the interplay between physiological and morphological divergence in adaptive radiations.
  • Assess the evolutionary rates of physiological versus morphological traits.

Main Methods:

  • Phylogenetic comparative analyses of Anolis lizard radiations.
  • Examined thermal physiology, performance in natural environments, and morphological traits.
  • Correlated physiological divergence with climatic niche evolution.

Main Results:

  • Repeated divergence in thermal physiology observed across Anolis radiations.
  • Physiological divergence significantly impacts performance within natural thermal regimes.
  • Co-occurring, morphologically similar Anolis species show distinct thermal physiology, supporting coexistence.
  • Physiological traits evolved slower than morphological traits.
  • Physiological divergence correlates with climatic niche divergence, though incompletely.

Conclusions:

  • Physiological divergence is a repeated adaptive strategy in Anolis radiations.
  • Both physiological and morphological divergence complementarily promote community diversity.
  • Integrating performance-based traits enhances understanding of climatic niche evolution and its consequences.