期刊
JOURNAL OF THE ROYAL SOCIETY INTERFACE
卷 11, 期 100, 页码 -出版社
ROYAL SOC
DOI: 10.1098/rsif.2014.0663
关键词
evolutionary dynamics; fluctuating environments; stochastic processes
资金
- EPSRC
- Deutsche Akademie der Naturforscher Leopoldina [LPDS 2012-12]
- Engineering and Physical Sciences Research Council [1165002] Funding Source: researchfish
The environment in which a population evolves can have a crucial impact on selection. We study evolutionary dynamics in finite populations of fixed size in a changing environment. The population dynamics are driven by birth and death events. The rates of these events may vary in time depending on the state of the environment, which follows an independent Markov process. We develop a general theory for the fixation probability of a mutant in a population of wild-types, and for mean unconditional and conditional fixation times. We apply our theory to evolutionary games for which the payoff structure varies in time. The mutant can exploit the environmental noise; a dynamic environment that switches between two states can lead to a probability of fixation that is higher than in any of the individual environmental states. We provide an intuitive interpretation of this surprising effect. We also investigate stationary distributions when mutations are present in the dynamics. In this regime, we find two approximations of the stationary measure. One works well for rapid switching, the other for slowly fluctuating environments.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据