Dispersal response to climate change: scaling down to intraspecific variation
Dispersal response to climate change: scaling down to intraspecific variation
复制标题
DOI：
10.1111/ele.12502
复制
发表时间：
2015-11-01
期刊：
影响因子：
8.8
通讯作者：
Cote, Julien
中科院分区：
文献类型：
--
作者：
Bestion, Elvire;Clobert, Jean;Cote, Julien
范围转移是对气候变化的一种广泛反应，它将取决于物种抵御温暖气候的能力。然而，这些能力可能会在物种内部发生变化，而这种种内变化会强烈影响物种对气候变化的反应。面对更温暖的气候，个体应根据其热最适性分散，从而导致物种范围的变化。本文采用半自然变暖实验，研究了爬行动物的个体扩散对气候变暖和偏好温度的响应。偏好温度较低的个体更多地从较温暖的半自然栖息地分散，而偏好温度较高的个体更多地从较冷的栖息地分散。这些扩散决策部分匹配表型依赖的存活率在不同的热生境，表明适应性扩散决策。这一过程将导致沿物种移动范围热表型的空间分离，这将促进当地对变暖气候的适应。因此，我们需要范围转移模型，包括种内热表型和扩散决策的变化。
Range shift, a widespread response to climate change, will depend on species abilities to withstand warmer climates. However, these abilities may vary within species and such intraspecific variation can strongly impact species responses to climate change. Facing warmer climates, individuals should disperse according to their thermal optimum with consequences for species range shifts. Here, we studied individual dispersal of a reptile in response to climate warming and preferred temperature using a semi-natural warming experiment. Individuals with low preferred temperatures dispersed more from warmer semi-natural habitats, whereas individuals with higher preferred temperatures dispersed more from cooler habitats. These dispersal decisions partly matched phenotype-dependent survival rates in the different thermal habitats, suggesting adaptive dispersal decisions. This process should result into a spatial segregation of thermal phenotypes along species moving ranges which should facilitate local adaptation to warming climates. We therefore call for range shift models including intraspecific variation in thermal phenotype and dispersal decision.