Dey Sutirth, Joshi Amitabh
Evolutionary Biology Laboratory, Evolutionary & Organismal Biology Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore 560 064, India.
Science. 2006 Apr 21;312(5772):434-6. doi: 10.1126/science.1125317.
Very few experimental studies have examined how migration rate affects metapopulation dynamics and stability. We studied the dynamics of replicate laboratory metapopulations of Drosophila under different migration rates. Low migration stabilized metapopulation dynamics, while promoting unstable subpopulation dynamics, by inducing asynchrony among neighboring subpopulations. High migration synchronized subpopulation dynamics, thereby destabilizing the metapopulations. Contrary to some theoretical predictions, increased migration did not affect average population size. Simulations based on a simple non-species-specific population growth model captured most features of the data, which suggests that our results are generalizable.
很少有实验研究考察迁移率如何影响集合种群动态和稳定性。我们研究了不同迁移率下果蝇复制实验室集合种群的动态。低迁移率通过诱导相邻亚种群间的异步性稳定了集合种群动态，同时促进了不稳定的亚种群动态。高迁移率使亚种群动态同步，从而使集合种群不稳定。与一些理论预测相反，迁移增加并未影响平均种群大小。基于一个简单的非物种特异性种群增长模型的模拟捕捉到了数据的大部分特征，这表明我们的结果具有普遍性。
