捕食者-猎物模型的稳定性分析,包括记忆效应,双Allee效应和霍林格I型功能响应
Ramesh K1, Ranjith Kumar G1, Aziz Khan2
1Department of Mathematics, Anurag University, Venkatapur, Hyderabad, Telangana, India.
PloS one
|January 3, 2025
概括
这项研究引入了一个带有Allee效应的分数捕食者-猎物模型. 它分析了稳定性和分叉,在强和弱弱的Allee效应场景中寻找平衡点的全球稳定性.
科学领域:
- 数学生物学 数学生物学
- 生态生态学 生态生态学
- 动态系统 动态系统
背景情况:
- 捕食者-猎物模型对于理解生态动态至关重要.
- 在低密度地区人口增长率下降的小效应显著影响人口稳定性.
- 分数计算提供了一个强大的框架,用于将记忆效应纳入生态模型.
研究的目的:
- 提出和分析一种新的分数顺序的捕食者-猎物模型,其中包含一个双重的Allee效应.
- 调查拟议的分数模型的数学属性,包括解决方案的存在和独特性.
- 为了比较分数捕食者-猎物系统中强和弱的Allee效应的稳定性动态.
主要方法:
- 使用卡普托的分数顺序导数来建模记忆效应.
- 分析分数系统的解决方案的存在,独特性,非负性和边界性.
- 在Matignon条件下检查平衡点和局部稳定性.
- 基于分数导数顺序的Hopf分叉条件的调查.
- 采用Lyapunov函数来证明全球对称稳定性.
主要成果:
- 确定了部分捕食者-猎物模型的存在和解决方案的独特性.
- 确定了平衡点,并对它们的局部稳定性进行了分析,以确定强和弱的Allee效应.
- 确定了作为分数顺序的函数的Hopf分叉的条件.
- 在两种阿利效应情况下,证明了正平衡点的全局非对称稳定性.
- 证明分数顺序显著影响系统动态和稳定性.
结论:
- 建议使用Allee效应的分数捕食者-猎物模型提供了更现实的生态系统表示.
- 该研究提供了对模型的稳定性和分叉性质的全面数学分析.
- 对比分析揭示了在分数上下文中强而弱的Allee效应之间明显的稳定性行为.
- 数字模拟证实了理论发现,并突出了复杂动态的潜力.
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