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Asynchronous evolution of physiology and morphology in Anolis lizards
Paul E Hertz1, Yuzo Arima, Alexis Harrison
1Department of Biological Sciences, Barnard College, New York, NY, USA
Summary
Anolis lizard evolution shows that thermal biology traits diverge faster than morphology. This suggests that adaptations to climate niches evolve more rapidly than those for structural niches.
Area of Science:
- Evolutionary Biology
- Ecology
- Herpetology
Background:
- Species radiations diversify along ecological axes with distinct adaptations.
- Anolis lizards exhibit radiations with morphological (structural niche) and physiological (climatic niche) traits.
Purpose of the Study:
- To test if different adaptive traits share similar evolutionary patterns within Anolis lizard radiations.
- To investigate the evolutionary patterns of morphological and thermal physiology traits.
Main Methods:
- Phylogenetic analyses were used to compare the evolutionary rates of morphological and thermal physiology traits.
- The study focused on Anolis lizards, examining traits related to microhabitat and thermal biology.
Main Results:
- Thermal biology showed greater divergence among recently diverged Anolis taxa compared to morphology.
- Diversification of thermal biology often followed diversification in morphology across Anolis species.
Conclusions:
- Morphological traits related to structural niche appear more evolutionarily conservative than thermal physiology traits tied to climatic niche.
- These findings support the hypothesis that thermal physiology evolves more rapidly than morphology in Anolis radiations.
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