Comparative Evolution of an Archetypal Adaptive Radiation: Innovation and Opportunity in Anolis Lizards

The American Naturalist
Steven PoeIan Latella

Abstract

Adaptive radiation is a widely recognized pattern of evolution wherein substantial phenotypic change accompanies rapid speciation. Adaptive radiation may be triggered by environmental opportunities resulting from dispersal to new areas or via the evolution of traits, called key innovations, that allow for invasion of new niches. Species sampling is a known source of bias in many comparative analyses, yet classic adaptive radiations have not been studied comparatively with comprehensively sampled phylogenies. In this study, we use unprecedented comprehensive phylogenetic sampling of Anolis lizard species to examine comparative evolution in this well-studied adaptive radiation. We compare adaptive radiation models within Anolis and in the Anolis clade and a potential sister lineage, the Corytophanidae. We find evidence for island (i.e., opportunity) effects and no evidence for trait (i.e., key innovation) effects causing accelerated body size evolution within Anolis. However, island effects are scale dependent: when Anolis and Corytophanidae are analyzed together, no island effect is evident. We find no evidence for an island effect on speciation rate and tenuous evidence for greater speciation rate due to trait effects. These re...Continue Reading

Citations

Oct 18, 2018·Systematic Biology·D S Caetano, L J Harmon
Apr 30, 2020·Proceedings. Biological Sciences·Agneesh Barua, Alexander S Mikheyev
Jul 5, 2018·Evolution; International Journal of Organic Evolution·L G AshmanC Moritz
May 7, 2021·Systematic Biology·Edward D Burress, Martha M Muñoz
Jul 1, 2021·Proceedings. Biological Sciences·Steven PoeChristopher Anderson
Jun 11, 2021·Systematic Biology·Aryeh H Miller, James T Stroud
Aug 17, 2021·Evolution; International Journal of Organic Evolution·Daniel S MoenJohn J Wiens
Oct 13, 2021·Proceedings of the National Academy of Sciences of the United States of America·Austin H PattonJonathan B Losos
Nov 25, 2021·Evolution; International Journal of Organic Evolution·Carlos J Pavón-VázquezJ Scott Keogh

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