论文标题
各向异性扩散在二维异质环境中的演变
Evolution of anisotropic diffusion in two-dimensional heterogeneous environments
论文作者
论文摘要
我们考虑一个在二维异质环境中组成的两个竞争人群的系统。假定种群以不同的概率进行水平和垂直移动，但否则是相同的。我们将这些概率视为分散策略。我们表明，进化稳定的策略仅是向一个方向移动。我们的结果预测，选择资源分布差异较小的方向对物种更有益。这一发现似乎与Hasting [15]和Dockery等人的经典结果一致。 [11]对于缓慢分散的演变，即在空间异质环境中选择随机扩散。这些结论还表明，应考虑有关异质栖息地运动的更广泛的分散策略。
We consider a system of two competing populations in two-dimensional heterogeneous environments. The populations are assumed to move horizontally and vertically with different probabilities, but are otherwise identical. We regard these probabilities as dispersal strategies. We show that the evolutionarily stable strategies are to move in one direction only. Our results predict that it is more beneficial for the species to choose the direction with smaller variation in the resource distribution. This finding seems to be in agreement with the classical results of Hasting [15] and Dockery et al. [11] for the evolution of slow dispersal, i.e. random diffusion is selected against in spatially heterogeneous environments. These conclusions also suggest that broader dispersal strategies should be considered regarding the movement in heterogeneous habitats.
