arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2302.01901math.DS
收藏

具有多重 Allee 效应和群体行为的扩散捕食者–猎物模型中的 Turing 不稳定性

Turing instability in a diffusive predator-prey model with multiple Allee effect and herd behavior

Jianglong Xiao, Yonghui Xia

AI总结:

针对含多重 Allee 效应、群体行为和二次死亡率的扩散捕食者–猎物模型,分析平衡点、分岔及 Turing 不稳定性条件,并通过数值模拟揭示猎物扩散过大将抑制 Turing 不稳定性。

摘要:

通过在猎物种群中引入多重 Allee 效应,本文研究了一个具有群体行为和二次死亡率的捕食者–猎物模型中的扩散驱动不稳定性与分岔分析。文中研究了系统平衡点的存在性与稳定性,并展示了无扩散系统的分岔行为。得到了 Turing 不稳定性发生的充分必要条件。同时,利用规范形方法探讨了 Hopf 分岔和稳态分岔的稳定性与方向。此外,给出了若干数值模拟以支持理论分析。研究发现,猎物的扩散速率过大会阻止 Turing 不稳定性出现。最后,在结论中总结了研究发现。

英文摘要:

Diffusion-driven instability and bifurcation analysis are studied in a predator-prey model with herd behavior and quadratic mortality by incorporating multiple Allee effect into prey species. The existence and stability of the equilibria of the system are studied. And bifurcation behaviors of the system without diffusion are shown. The sufficient and necessary conditions for Turing instability occurring are obtained. And the stability and the direction of Hopf and steady state bifurcations are explored by using the normal form method. Furthermore, some numerical simulations are presented to support our theoretical analysis. We found that too large diffusion rate of prey prevents Turing instability from emerging. Finally, we summarize our findings in the conclusion.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑