Global dynamics of a two-species Lotka-Volterra competition-diffusion-advection system with general carrying capacities and intrinsic growth rates II: Different diffusion and advection rates

Global dynamics of a two-species Lotka-Volterra competition-diffusion-advection system with general carrying capacities and intrinsic growth rates II: Different diffusion and advection rates
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具有一般承载能力和内在增长率的两种 Lotka-Volterra 竞争扩散平流系统的全局动力学 II:不同的扩散和平流速率

DOI:
10.1016/j.jde.2022.11.014
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发表时间:
2023-01
影响因子:
2.4
通讯作者:
De Tang
De Tang
中科院分区:
数学2区
文献类型:
--
作者:
Qing Ge;De Tang

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研究了一类具有一般内禀增长率和承载力的两种群竞争扩散平流系统,其中两个水生种群具有不同的平流和扩散率.一些特殊的情况已被广泛研究,例如:非平流情况[8,9],均匀情况[23,24,40],比例情况[20,25]。然而,由于扩散-平流型算子以及异构环境所造成的困难,在以前的论文中所开发的方法不能直接应用于一般情况下。利用some.new技术,我们刻画了两个半平凡平衡态的线性稳定性,并在几种情形下建立了共存平衡态的不存在性。基于这些准备和单调动力系统理论,我们建立了主要结果。我们的结果表明,竞争,排斥和共存可能发生。特别地,我们为两个物种的共存提供了一种新的途径。
We study a two-species competition-diffusion-advection system with general intrinsic growth rates and.carrying capacities in heterogeneous closed environments, where the two aquatic species have different.advection and/or diffusion rates. Some special cases have been widely investigated, for example: the nonadvective case [8,9], the homogeneous case [23,24,40], the proportional case [20,25]. However, due to the.difficulty caused by the diffusion-advection type operators as well as the heterogeneous environments, the.approaches developed in the previous papers cannot be directly applied to the general case here. With some.new techniques, we characterize the linear stability of the two semi-trivial steady states and establish the.non-existence of co-existence steady states in several scenarios. Based on these preparations and the theory.of monotone dynamical systems, we establish the main results. Our results indicate that both competitive.exclusion and coexistence may occur. Specially, we show a new way for coexistence of two species.
DOI: --
发表时间: 1984-02
期刊: Journal of the Faculty of Science, the University of Tokyo. Sect. 1 A, Mathematics
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