Metapopulation models for historical inference
Metapopulation models for historical inference
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DOI：
10.1111/j.1365-294x.2004.02086.x
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发表时间：
2004-04-01
影响因子：
4.9
通讯作者：
Wakeley, J
中科院分区：
文献类型：
--
作者：
Wakeley, J
从集合种群的样本，其中当地人口的迁移连接，并可以经历灭绝和随后的灭绝过程的系谱过程中，被证明有一个相对简单的结构在极限的集合种群的数量接近无穷大。结果，这是一个近似的祖先行为的样本从集合种群与大量的人口，是相同的，如先前所描述的其他集合种群模型，即系谱过程密切相关的金曼的非结构化的聚结。目前的工作考虑了更一般的一类模型，包括两种灭绝和灭绝前的配子生产的可能性。此外，在最近的其他工作之后，将集合种群分为许多种群的这一结果被证明在有限的种群规模和通常的扩散限制（假设种群规模很大）下都成立。例子说明了通常的扩散限制是适当的，当它不是。一些缺点和扩展的模型被认为是，并讨论了这些模型的相关性，以了解人类历史。
The genealogical process for a sample from a metapopulation, in which local populations are connected by migration and can undergo extinction and subsequent recolonization, is shown to have a relatively simple structure in the limit as the number of populations in the metapopulation approaches infinity. The result, which is an approximation to the ancestral behaviour of samples from a metapopulation with a large number of populations, is the same as that previously described for other metapopulation models, namely that the genealogical process is closely related to Kingman's unstructured coalescent. The present work considers a more general class of models that includes two kinds of extinction and recolonization, and the possibility that gamete production precedes extinction. In addition, following other recent work, this result for a metapopulation divided into many populations is shown to hold both for finite population sizes and in the usual diffusion limit, which assumes that population sizes are large. Examples illustrate when the usual diffusion limit is appropriate and when it is not. Some shortcomings and extensions of the model are considered, and the relevance of such models to understanding human history is discussed.