在经过修改的Leslie-Gower捕食者-猎物模型中进行分叉分析,具有恐惧效应和多次延迟
Shuo Yao1, Jingen Yang2, Sanling Yuan1
1College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China.
Mathematical biosciences and engineering : MBE
|June 14, 2024
概括
这项研究引入了一种具有恐惧效应和延迟的捕食者-猎物模型,发现恐惧可以稳定人口. 增加恐惧强度或替代猎物也提高了人口的稳定性.
科学领域:
- 生态生态学 生态生态学
- 数学生物学 数学生物学
- 人口动态 人口动态
背景情况:
- 捕食者-猎物模型是生态学的基础.
- 结合恐惧和时间延迟,为生态模型增加了现实性.
- 了解人口稳定性对于生态系统管理至关重要.
研究的目的:
- 分析一种经过修改的Leslie-Gower捕食者-猎物模型,其中包括恐惧和延迟.
- 调查恐惧效应和时间延迟对人口动态的影响.
- 为了确定人口稳定和周期性解决方案的条件.
主要方法:
- 对平衡存在和局部稳定性的分析.
- 霍普的双叉分析以检测周期性溶液.
- 正常形式理论和稳定性分析的中心多样数定理.
- 数字模拟用于验证.
主要成果:
- 恐惧延迟可以在正平衡状态下诱导稳定性切换.
- 增加恐惧强度促进了积极平衡的稳定性.
- 替代猎物的存在也加强了种群的稳定性.
结论:
- 修改后的捕食者-猎物模型为恐惧的生态作用提供了洞察力.
- 时间延迟,特别是恐惧延迟,显著影响人口动态.
- 恐惧和替代猎物可以作为生态系统的稳定因素.
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