Adaptation and Evolutionary Rescue in Metapopulations Experiencing Environmental Deterioration
Adaptation and Evolutionary Rescue in Metapopulations Experiencing Environmental Deterioration
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DOI：
10.1126/science.1203105
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发表时间：
2011-06-10
期刊：
影响因子：
56.9
通讯作者：
Gonzalez, Andrew
中科院分区：
文献类型：
--
作者：
Bell, Graham;Gonzalez, Andrew
目前尚不清楚进化是否足够快，以允许一个物种适应并在不断恶化的环境中生存。我们跟踪生态进化动力学的集合种群的实验室模型系统的酵母暴露于盐胁迫。集合种群经历了三个不同的速度和他们的组成种群的环境恶化是不连接或连接的本地分散或全球分散。我们发现，逐渐恶化和局部扩散有利于适应。在进一步的突然恶化之后，进化拯救的频率取决于先前的恶化速率和扩散速率。适应是令人惊讶的频繁和快速的小周边人群。因此，进化动力学影响环境恶化后物种的持久性和范围。
It is not known whether evolution will usually be rapid enough to allow a species to adapt and persist in a deteriorating environment. We tracked the eco-evolutionary dynamics of metapopulations with a laboratory model system of yeast exposed to salt stress. Metapopulations experienced environmental deterioration at three different rates and their component populations were either unconnected or connected by local dispersal or by global dispersal. We found that adaptation was favored by gradual deterioration and local dispersal. After further abrupt deterioration, the frequency of evolutionary rescue depended on both the prior rate of deterioration and the rate of dispersal. Adaptation was surprisingly frequent and rapid in small peripheral populations. Thus, evolutionary dynamics affect both the persistence and the range of a species after environmental deterioration.