How do genetic correlations affect species range shifts in a changing environment?
How do genetic correlations affect species range shifts in a changing environment?
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DOI：
10.1111/j.1461-0248.2011.01734.x
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发表时间：
2012-03-01
期刊：
影响因子：
8.8
通讯作者：
Ronce, Ophelie
中科院分区：
文献类型：
--
作者：
Duputie, Anne;Massol, Francois;Ronce, Ophelie
通过适应和迁徙的结合，物种可能能够对不断变化的环境做出反应。我们研究了当适应涉及多个数量性状时，它如何影响范围转移，以响应局部选择压力和基因流。所有性状都会形成在空间上移动的倾斜系，其中一些可能与单变量预测相反，物种以恒定的滞后跟踪其最适环境。我们给出了局部密度和平均性状值的解析表达式。当空间环境变化小(产生低迁徙负荷)和多性状适应潜力高时，物种可以维持更快的环境变化，发展更广的范围和更大的局部适应。当非线性(稳定化)选择在最适变化的表型方向上较弱，而遗传变异在选择梯度的表型方向上较高时，这些条件是有利的。
Species may be able to respond to changing environments by a combination of adaptation and migration. We study how adaptation affects range shifts when it involves multiple quantitative traits evolving in response to local selection pressures and gene flow. All traits develop clines shifting in space, some of which may be in a direction opposite to univariate predictions, and the species tracks its environmental optimum with a constant lag. We provide analytical expressions for the local density and average trait values. A species can sustain faster environmental shifts, develop a wider range and greater local adaptation when spatial environmental variation is low (generating low migration load) and multitrait adaptive potential is high. These conditions are favoured when nonlinear (stabilising) selection is weak in the phenotypic direction of the change in optimum, and genetic variation is high in the phenotypic direction of the selection gradient.