Evolutionarily stable dispersal rate in a metapopulation with extinctions and kin competition
Evolutionarily stable dispersal rate in a metapopulation with extinctions and kin competition
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DOI：
10.1006/jtbi.1999.0960
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发表时间：
1999-08-07
影响因子：
2
通讯作者：
Michalakis, Y
中科院分区：
文献类型：
--
作者：
Gandon, S;Michalakis, Y
我们推导出一个解析表达式的进化稳定的扩散率，形式化的四个因素的影响之间的平衡：扩散的成本，灭绝率，相关系数和扩散模式（即移民的共同起源的概率）。这一结果使我们能够研究每个因素的影响，更有趣的是，它们之间的相互作用。特别是，我们表明，进化稳定的扩散率并不总是一个递减的函数的扩散成本和相关性的递增函数。这些反直观的结果进行了讨论，在亲属选择理论的光。我们还提出了数值模拟的结果，其中相关性不是一个固定的参数，但取决于不同的参数，包括分散本身。我们讨论了这些结果，并显示了进化稳定的扩散率是如何影响的环境和物种的生活史特征。更一般地说，本文提出了一个简单的形式主义，允许亲属选择在不稳定的环境中的影响的研究（即与precisionsanderonizations）。这种形式主义的其他生活史特征的进化的理解的影响进行了简要讨论。(C)北京：科学出版社.
We derive an analytic expression for the evolutionarily stable dispersal rate that formalizes the balance between the effects of four factors: the cost of dispersal, the extinction rate, the coefficient of relatedness and the mode of dispersal (i.e. the probability of common origin of immigrants). This result allows us to study the effects of each factor and, more interestingly, the interactions between them. In particular, we show that the evolutionarily stable dispersal rate is not always a decreasing function of the cost of dispersal and an increasing function of relatedness. These counter-intuitive results are discussed in the light of kin selection theory. We also present the results of numerical simulations in which relatedness is not a fixed parameter but depends on different parameters including dispersal itself. We discuss these results and show how the evolutionarily stable dispersal rate is affected by the environment and the life history traits of the species. More generally, this paper presents a simple formalism allowing the study of the effects of kin selection in unstable environments (i.e. with extinctions and recolonizations). The implications of this formalism for the understanding of the evolution of other life history traits is briefly discussed. (C) 1999 Academic Press.