在具有单一灵敏度和间接信号生成的两种化学反应竞争系统中的持久性和局限性
Dongxiu Wang1, Fugeng Zeng1, Lei Huang1
1School of Data Science and Information Engineering, Guizhou Minzu University, Guiyang 550025, China.
Mathematical biosciences and engineering : MBE
|December 21, 2023
概括
这项研究分析了两种具有单一灵敏度的化学毒素竞争模型. 它发现,人口灭绝,如果它发生,是空间局部化的,而不是全球性的.
科学领域:
- 数学生物学 数学生物学
- 部分微分方程 部分微分方程
- 人口动态 人口动态
背景情况:
- 化学反应系统模拟人群运动,以响应化学信号.
- 竞争动态对于理解物种共存和排斥至关重要.
- 单点敏感性和间接信号产生在人口模型中引入复杂的行为.
研究的目的:
- 分析一种两种化学反应-竞争系统的全球界限性和灭绝行为.
- 研究单一灵敏度和间接信号产生对人口动态的影响.
- 建立基于扩散性质的解决方案的全球边界性条件.
主要方法:
- 开发一种两种化学毒素竞争模型,具有后勤增长和诺伊曼边界条件.
- 使用Lyapunov函数来导出人口密度的下界.
- 分析系统在特定条件下对扩散系数和参数的行为.
主要成果:
- 确定了两个物种种群的整数 ($ \int_{\Omega}u $ 和 $ \int_{\Omega}v $) 的下界.
- 这些发现表明,任何种群灭绝都是空间局部化的.
- 当 $ \min\{\theta_1, \theta_2\} > 1-\frac{2}{n+1} $ 为 $ n\geq2 $. 时,证明了解决方案的全局局限性.
结论:
- 该模型展示了局部灭绝现象,防止了人口的完全崩.
- 扩散率在确保系统的全球稳定性方面发挥着至关重要的作用.
- 这项研究提供了关于生态模型中化学毒素,竞争和扩散的复杂相互作用的见解.
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