人口统计随机性在具有有性生殖的物种形成模型中的作用
The role of demographic stochasticity in a speciation model with sexual reproduction
摘要：
最近的理论研究表明，人口统计随机性可以大大增加无性繁殖的表型多样性生物体自发进化成局部集群的趋势，这表明同域物种形成的简单机制。在这里，我们研究的作用，人口统计随机性的竞争生物体的模型受到竞争性交配。我们发现，在模型与有性生殖，噪声也可以导致形成的表型集群的参数范围内，确定性模型将导致均匀分布。在某些情况下，噪声可能会产生相当大的影响，使确定性建模不足以理解表型分布。
英文摘要：
Recent theoretical studies have shown that demographic stochasticity can greatly increase the tendency of asexually reproducing phenotypically diverse organisms to spontaneously evolve into localised clusters, suggesting a simple mechanism for sympatric speciation. Here we study the role of demographic stochasticity in a model of competing organisms subject to assortative mating. We find that in models with sexual reproduction, noise can also lead to the formation of phenotypic clusters in parameter ranges where deterministic models would lead to a homogeneous distribution. In some cases, noise can have a sizeable effect, rendering the deterministic modelling insufficient to understand the phenotypic distribution.
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