Eco-evolutionary dynamics of dispersal in spatially heterogeneous environments.

Eco-evolutionary dynamics of dispersal in spatially heterogeneous environments.
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DOI:
10.1111/j.1461-0248.2011.01671.x
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发表时间:
2011-10
期刊:
影响因子:
8.8
通讯作者:
Mononen T
Mononen T
中科院分区:
环境科学与生态学1区
文献类型:
--
作者:
Hanski I;Mononen T

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自然种群的进化变化往往是如此之快,以至于进化动力学可能会影响生态种群动力学,反之亦然。在这里,我们通过将随机斑块占据集合种群模型与当地种群中快速分散个体频率变化的模型相结合,构建了一个分散的生态进化模型。我们测试的模型使用的基因磷酸葡萄糖异构酶(PGI),这是强烈相关的扩散率在格兰维尔贝母蝴蝶的等位基因变异的数据。移民和灭绝率和移民中快速分散个体的频率的人口特异性措施解释了97个当地人群中Pgi等位基因频率的40%的空间变异。该模型阐明了创始人事件和基因流在扩散演化中的作用,并解决了文献中关于栖息地丧失和破碎化对扩散演化的影响的争议。
Evolutionary changes in natural populations are often so fast that the evolutionary dynamics may influence ecological population dynamics and vice versa. Here we construct an eco-evolutionary model for dispersal by combining a stochastic patch occupancy metapopulation model with a model for changes in the frequency of fast-dispersing individuals in local populations. We test the model using data on allelic variation in the gene phosphoglucose isomerase (Pgi), which is strongly associated with dispersal rate in the Glanville fritillary butterfly. Population-specific measures of immigration and extinction rates and the frequency of fast-dispersing individuals among the immigrants explained 40% of spatial variation in Pgi allele frequency among 97 local populations. The model clarifies the roles of founder events and gene flow in dispersal evolution and resolves a controversy in the literature about the consequences of habitat loss and fragmentation on the evolution of dispersal.
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