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具有Allee效应的加性随机捕食模型的动力学研究

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生态系统中捕食者和被捕食者受到群聚生活的影响,Allee效应充分反映种群大小、密度及其增长率之间的相互作用.同时,生态系统会受到随机因素的影响.因此,本文研究具有Allee效应的加性随机捕食模型的动力学行为.通过构造恰当随机Lyapunov函数,得到了种群灭绝的充分条件,以及建立了遍历稳态分布的充分条件.此外,给出相关数值仿真验证的结果.
Dynamics Analysis of an Additive Stochastic Predator-Prey Model with Allee Effect
Predators and prey in ecosystems are affected by social life, and the Allee effect fully reflects the interaction between popu-lation size, density, and growth rate. And then, ecosystems are subject to random factors. Therefore, the dynamic behavior of additive stochastic prey-predator model with Allee effect are studied in this paper. By constructing a suitable stochastic Lyapunov function, we obtain sufficient conditions for extinction of the predator species and establish sufficient conditions for the existence of an ergodic sta-tionary distribution of the positive solution to such system. In addition, some numerical simulation results are given.

stochastic prey-predator modelAllee effectextinctionergodicity

刘彪、余蕾

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安徽建筑大学数理学院 合肥 安徽 230601

随机捕食食饵模型 Allee效应 灭绝性 遍历性

国家自然科学基金项目安徽省教育厅高校自然科学研究项目

12101005KJ2020A0483

2024

安徽建筑大学学报
安徽建筑工业学院

安徽建筑大学学报

影响因子:0.354
ISSN:2095-8382
年,卷(期):2024.32(3)