Hurricane-induced selection on the morphology of an island lizard

Colin M. Donihue (), Anthony Herrel, Anne-Claire Fabre, Ambika Kamath, Anthony J. Geneva, Thomas W. Schoener, Jason J. Kolbe and Jonathan B. Losos
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Colin M. Donihue: Harvard University, Department of Organismic and Evolutionary Biology
Anthony Herrel: UMR 7179 CNRS/MNHN, Département Adaptations du Vivant
Anne-Claire Fabre: UMR 7179 CNRS/MNHN, Département Adaptations du Vivant
Ambika Kamath: Evolution, and Marine Biology
Anthony J. Geneva: Harvard University, Department of Organismic and Evolutionary Biology
Thomas W. Schoener: University of California, Department of Evolution and Ecology
Jason J. Kolbe: University of Rhode Island, Department of Biological Sciences
Jonathan B. Losos: Washington University, Department of Biology

Nature, 2018, vol. 560, issue 7716, 88-91

Abstract: Abstract Hurricanes are catastrophically destructive. Beyond their toll on human life and livelihoods, hurricanes have tremendous and often long-lasting effects on ecological systems1,2. Despite many examples of mass mortality events following hurricanes3–5, hurricane-induced natural selection has not previously been demonstrated. Immediately after we finished a survey of Anolis scriptus—a common, small-bodied lizard found throughout the Turks and Caicos archipelago—our study populations were battered by Hurricanes Irma and Maria. Shortly thereafter, we revisited the populations to determine whether morphological traits related to clinging capacity had shifted in the intervening six weeks and found that populations of surviving lizards differed in body size, relative limb length and toepad size from those present before the storm. Our serendipitous study, which to our knowledge is the first to use an immediately before and after comparison6 to investigate selection caused by hurricanes, demonstrates that hurricanes can induce phenotypic change in a population and strongly implicates natural selection as the cause. In the decades ahead, as extreme climate events are predicted to become more intense and prevalent7,8, our understanding of evolutionary dynamics needs to incorporate the effects of these potentially severe selective episodes9–11.

Date: 2018
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DOI: 10.1038/s41586-018-0352-3

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