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首页> 外文期刊>Discrete and continuous dynamical systems >QUALITATIVE ANALYSIS FOR A LOTKA-VOLTERRA COMPETITION SYSTEM IN ADVECTIVE HOMOGENEOUS ENVIRONMENT
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QUALITATIVE ANALYSIS FOR A LOTKA-VOLTERRA COMPETITION SYSTEM IN ADVECTIVE HOMOGENEOUS ENVIRONMENT

机译:平程性均匀环境中Lotka-Volterra竞争体系的定性分析

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摘要

We study a two-species Lotka-Volterra competition model in an advective homogeneous environment. It is assumed that two species have the same population dynamics and diffusion rates but different advection rates. We show that if one competitor disperses by random diffusion only and the other assumes both random and directed movements, then the one without advection prevails. If two competitors are drifting along the same direction but with different advection rates, then the one with the smaller advection rate wins. Finally we prove that if the two competitors are drifting along the opposite direction, then two species will coexist. These results imply that the movement without advection in homogeneous environment is evolutionaxily stable, as advection tends to move more individuals to the boundary of the habitat and thus cause the distribution of species mismatch with the resources which are evenly distributed in space.
机译:我们研究了一个平流的均匀环境中的两种品种Lotka-Volterra竞争模式。假设两个物种具有相同的人群动态和扩散率,但不同的平流率。我们表明,如果一个竞争对手仅通过随机扩散分散,另一个竞争对手呈现随机和定向的运动,则没有前进的那个占上风。如果两个竞争对手沿着同一方向漂移,但具有不同的平流率,那么具有较小的平流率赢得的人。最后,我们证明,如果两个竞争对手沿相反方向漂移,那么两种物种将共存。这些结果意味着在均匀环境中没有平流的运动是发展的,随着平流倾向于将更多个体移动到栖息地的边界,因此导致物种的分布与均匀分布在太空中的资源中的物种不匹配。

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