Dynamics for a Three-Species Predator-Prey Model with Density-Dependent Motilities

Dynamics for a Three-Species Predator-Prey Model with Density-Dependent Motilities
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具有密度依赖性运动的三种捕食者-被捕食者模型的动力学

DOI:
10.1007/s10884-021-10020-6
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发表时间:
2021-07
影响因子:
1.3
通讯作者:
Tu Xinyu
Tu Xinyu
中科院分区:
数学3区
文献类型:
--
作者:
Qiu Shuyan;Mu Chunlai;Tu Xinyu

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这项工作涉及一种通用的交叉扩散系统,该系统对两种捕食者和一种猎物的动力学行为进行建模,具有信号依赖性扩散和受均匀诺依曼边界条件影响的敏感性。首先,根据一些估计技术,在适当的运动函数和Logistic源系数条件下,严格证明了任意维正经典解的全局存在性和一致有界性。此外,通过构建一些适当的李亚普诺夫函数,我们进一步建立了特定模型解的渐近行为,该模型具有 Lotka-Volterra 型函数响应和两种捕食者的密度依赖死亡率以及猎物的逻辑类型。我们的结果不仅概括了先前已知的结果,而且还提出了一些新的结论。
This work deals with a general cross-diffusion system modeling the dynamics behavior of two predators and one prey with signal-dependent diffusion and sensitivity subject to homogeneous Neumann boundary conditions. Firstly, in light of someestimate techniques, we rigorously prove the global existence and uniform boundedness of positive classical solutions in any dimensions with suitable conditions on motility functions and the coefficients of logistic source. Moreover, by constructing some appropriate Lyapunov functionals, we further establish the asymptotic behavior of solutions to a specific model with Lotka-Volterra type functional responses and density-dependent death rates for two predators as well as logistic type for the prey. Our results not only generalize the previously known one, but also present some new conclusions.
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发表时间: 2018-02
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