Evolution of specialization in a spatially continuous environment
Evolution of specialization in a spatially continuous environment
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DOI：
10.1111/j.1420-9101.2010.01966.x
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发表时间：
2010-05-01
影响因子：
2.1
通讯作者：
Gandon, S.
中科院分区：
文献类型：
--
作者：
Debarre, F.;Gandon, S.
我们研究划分为两个栖息地的空间连续（一维）环境中的专业化演化；我们使用与两个栖息地的适应性相关的一般权衡函数，并用两个经典的权衡函数说明我们的结果。我们表明，种群可以达到该性状的中间值并适度适应两种栖息地（1 名通才），或者分为两个适应当地的亚种群（2 名专家）。我们恢复了通过岛屿迁移的更简单的集合种群模型获得的定性结果：进化结果取决于权衡的凹性、每个栖息地的比例和迁移。然而，我们对迁移的定量预测取决于距离的隔离。因此，我们的空间显式模型对于描述也许更现实的生态场景中的专业化进化动态可能特别有用。
We study the evolution of specialization in a spatially continuous (one-dimensional) environment divided into two habitats; we use a general trade-off function relating fitnesses in the two habitats and illustrate our results with two classical trade-off functions. We show that the population can either reach an intermediate value of the trait and be moderately adapted to both habitats (1 generalist), or split into two locally adapted subpopulations (2 specialists). We recover the qualitative results obtained with simpler metapopulation models with island migration: the evolutionary outcome depends on the concavity of the trade-off, on the proportion of each habitat and on migration. Our quantitative prediction on migration, however, depends on isolation by distance. Our spatially explicit model may thus be particularly useful to describe the evolutionary dynamics of specialization in, perhaps, more realistic ecological scenarios.