Evolution of dispersal in advective homogeneous environments

Evolution of dispersal in advective homogeneous environments
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平流均匀环境中扩散的演变

DOI:
10.3934/dcds.2020247
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发表时间:
2020
影响因子:
1.1
通讯作者:
De Tang
De Tang
中科院分区:
数学3区
文献类型:
--
作者:
Li Ma;De Tang

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弱平流和强平流对反应扩散模型动力学的影响已经研究了很长时间。相比之下,中间平流的作用仍然知之甚少。本文研究一维平流均匀环境下的两物种竞争模型,其中两物种除了扩散速率和平流速率外完全相同。周(P. Zhou,关于Lotka-Volterra竞争系统:扩散与平流,Calc. Var.偏微分方程,55 (2016),Art. 137, 29 pp)考虑了无通量边界条件下的系统。本文重点研究了上游端具有诺伊曼边界条件而下游端具有敌对边界条件的情况。采用一种新的方法,首先以临界扩散速率和临界平流速率的形式确定了相应单种模型持续存在的充分必要条件。进一步,对于两种模型,我们发现(1)缓慢扩散+快速平流的策略总是有利的;(ii)当较快的平流与适当较快的扩散同时存在时,两种物种也会共存。
The effects of weak and strong advection on the dynamics of reaction-diffusion models have long been investigated. In contrast, the role of intermediate advection still remains poorly understood. This paper is devoted to studying a two-species competition model in a one-dimensional advective homogeneous environment, where the two species are identical except their diffusion rates and advection rates. Zhou (P. Zhou, On a Lotka-Volterra competition system: diffusion vs advection, Calc. Var. Partial Differential Equations, 55 (2016), Art. 137, 29 pp) considered the system under the no-flux boundary conditions. It is pointed that, in this paper, we focus on the case where the upstream end has the Neumann boundary condition and the downstream end has the hostile condition. By employing a new approach, we firstly determine necessary and sufficient conditions for the persistence of the corresponding single species model, in forms of the critical diffusion rate and critical advection rate. Furthermore, for the two-species model, we find that (i) the strategy of slower diffusion together with faster advection is always favorable; (ii) two species will also coexist when the faster advection with appropriate faster diffusion.
平流均质环境中 Lotka-Volterra 竞争扩散系统的全局动力学
DOI: 10.1016/j.jde.2020.01.011
发表时间: 2020-07
影响因子: 2.4
作者:
De Tang;Yuming Chen
通讯作者: Yuming Chen
DOI: 10.1088/0031-9112/7/10/004
发表时间: 2011-09
期刊: Physics Bulletin
影响因子: --
作者:
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通讯作者: W. Ni
DOI: 10.1007/s00526-016-1021-8
发表时间: 2016-06
影响因子: 2.1
作者:
Xiao-Qiang Zhao;Peng Zhou
通讯作者: Xiao-Qiang Zhao;Peng Zhou
DOI: 10.1016/j.nonrwa.2018.11.011
发表时间: 2019-06
期刊: Nonlinear Analysis: Real World Applications
影响因子: --
作者:
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经典 Lotka-Volterra 竞争-扩散-平流系统的全局动力学
DOI: 10.1016/j.jfa.2018.03.006
发表时间: 2018
影响因子: 1.7
作者:
Zhou Peng;Xiao Dongmei
通讯作者: Xiao Dongmei