Global dynamics of a Lotka-Volterra competition-diffusion system in advective homogeneous environments

Global dynamics of a Lotka-Volterra competition-diffusion system in advective homogeneous environments
复制标题

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
复制
发表时间:
2020-07
影响因子:
2.4
通讯作者:
Yuming Chen
Yuming Chen
中科院分区:
数学2区
文献类型:
--
作者:
De Tang;Yuming Chen

文献摘要

参考文献

被引文献

相似文献

本文主要研究了一维平流均匀环境中的两种群竞争模型,其中两个种群除了扩散率外是相同的。该模型的一个有趣的特点是,在下游端的边界条件代表一个净损失的个人,这是调整的参数B,以衡量损失的大小。当上游端具有无通量条件时,Lou和Zhou(2015)[11]已经证实,当0≤ B< 1时,大的扩散速率更有利。这里我们考虑上游端具有自由流条件的情况,这意味着上游端与湖泊相连。我们首先研究了相应的单种群模型。在这里,我们建立的存在性和唯一性的积极的稳定状态。对于两种群模型,我们发现参数B可以看作是一个分歧参数。准确地说,当0≤ B< 1时,大的扩散速率更有利,而当B> 1时,选择小的扩散速率(如果存在)。当B= 1时,系统是退化的,即存在一个由连续定态组成的紧致全局吸引子.
In this paper, we mainly study a two-species competition model in a one-dimensional advective homogeneous environment, where the two species are identical except their diffusion rates. One interesting feature of the model is that the boundary condition at the downstream end represents a net loss of individuals, which is tuned by a parameter b to measure the magnitude of the loss. When the upstream end has the no-flux condition, Lou and Zhou (2015)[11] have confirmed that large diffusion rate is more favorable when 0≤ b< 1. Here we consider the case where the upstream end has the free-flow condition, which means that the upstream end is linked to a lake. We firstly investigate the corresponding single species model. Here we establish the existence and uniqueness of positive steady states. Then for the two-species model, we find that the parameter b can be regarded as a bifurcation parameter. Precisely, when 0≤ b< 1, large diffusion rate is more favorable while when b> 1, small diffusion rate is selected (if exists). When b= 1, the system is degenerate in the sense that there is a compact global attractor consisting of a continuum of steady states.
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:
Fangfang Xu;Wenzhen Gan
通讯作者: Fangfang Xu;Wenzhen Gan
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
DOI: 10.1016/0040-5809(83)90027-8
发表时间: 1983-01-01
影响因子: 1.4
作者:
HASTINGS, A
通讯作者: HASTINGS, A
DOI: 10.1016/j.nonrwa.2019.102983
发表时间: 2020-02
影响因子: 2
作者:
Fangfang Xu;Wenzhen Gan;D. Tang
通讯作者: Fangfang Xu;Wenzhen Gan;D. Tang