Department of Wildlife Ecology and Conservation, University of Florida, Gainesville, FL 32611-7011, USA.
Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15261, USA.
Biol Lett. 2022 Aug;18(8):20220152. doi: 10.1098/rsbl.2022.0152. Epub 2022 Aug 3.
Extreme climatic events (ECEs) such as hurricanes have been hypothesized to be a major driving force of natural selection. Recent studies argue that, following strong hurricane disturbance, lizards in the Caribbean undergo selection for traits such as longer forelimbs or smaller body sizes that improve their clinging ability to their substrates increasing their chances of surviving hurricane wind gusts. Some authors challenge the generalization of this hypothesis arguing that other mechanisms may explain these phenotypic changes or that they may not necessarily be generalizable across systems. To address this issue, we compared body size and relative forelimb length of , a trunk-ground anole living in closed-canopy forests in Puerto Rico, before, four months after, and 15 months after Hurricanes Irma and Maria in 2017. Overall, our results show no clear evidence of a temporal decrease in body size or increase forelimb length (relative to body size) challenging the generalizability of the clinging ability hypothesis. Understanding how animals adapt to ECE is an emerging field. Still, we are quickly learning that this process is complex and nuanced.
极端气候事件(ECEs),如飓风,被假设为自然选择的主要驱动力。最近的研究认为,在强烈的飓风干扰之后,加勒比地区的蜥蜴会选择具有更长的前肢或更小的体型等特征,这些特征可以提高它们在基质上的抓握能力,从而增加它们在飓风阵风下生存的机会。一些作者质疑这一假设的普遍性,认为其他机制可能解释了这些表型变化,或者它们不一定在整个系统中具有普遍性。为了解决这个问题,我们比较了 2017 年飓风“艾尔玛”和“玛丽亚”前后 15 个月,波多黎各封闭林冠森林中生活的一种树干地蜥蜴的体型大小和相对前肢长度。总的来说,我们的结果没有明显的证据表明体型在时间上减小或前肢长度(相对于体型)增加,这挑战了抓握能力假说的普遍性。了解动物如何适应 ECE 是一个新兴领域。尽管如此,我们很快就会发现,这个过程是复杂和微妙的。