arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2002.10724math.APq-bio.PE
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二维非均匀环境中各向异性扩散的演化

Evolution of anisotropic diffusion in two-dimensional heterogeneous environments

Emeric Bouin, Guillaume Legendre, Yuan Lou, Nichole Slover

摘要:

我们考虑一个系统的两个竞争的人口在二维异质环境。假设种群以不同的概率水平和垂直移动,但在其他方面是相同的。我们将这些概率视为分散策略。我们证明了进化稳定策略只能向一个方向移动。我们的研究结果预测,这是更有利的物种选择的方向与较小的变化,在资源分布。这一发现似乎与Hasting [15]和Dockery等人[11]关于缓慢扩散演化的经典结果一致,即在空间异质环境中选择随机扩散。这些结论也表明,更广泛的扩散策略,应考虑在异质栖息地的运动。

英文摘要:

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.

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