一个特定植被系统中的多稳定性转移具有非局部吸水效应
Zhi-Chao Xue1, Jing Li2, Cui-Hua Wang3
1Complex Systems Research Center, Shanxi University, Taiyuan, 030006, China.
Journal of mathematical biology
|July 10, 2025
概括
这项研究引入了一种具有非局部吸水的新植被-水模型,揭示了这种效应如何影响干旱生态系统中的植被模式和稳定状态. 这些发现解释了全球观察到的各种模式,与典型的图灵模式不同.
科学领域:
- 生态建模 生态建模
- 数学生物学的数学生物学
- 干旱的生态系统动态.
背景情况:
- 干旱地区的植被模式往往是周期性的,通常用图灵模式来描述.
- 以前的模型忽略了植被非局部吸收水的能力.
- 了解这些模式对于干旱土地管理至关重要.
研究的目的:
- 开发一种包含非局部吸水的植被水模型.
- 分析图灵分叉和模式形成的条件.
- 研究非局部影响对多元稳定性和模式多样性的影响.
主要方法:
- 开发一种具有非局部吸收的植被-水模型.
- 应用弱非线性分析来导出振幅方程.
- 对图灵双叉条件和稳定状态的分析.
主要成果:
- 非局部吸收可以诱导超临界的图灵分叉,与以前的模型中的亚临界类型不同.
- 非局部效应驱动超临界和亚临界图灵分叉之间的过渡.
- 多稳定性状态,包括三稳定性 (裸土,均和周期性植被),出现.
- 解释了在塞内加尔观察到的模式,与澳大利亚的童话圈不同.
- 随着降水的变化,植被系统从单稳定性转变为双稳定性和三稳定性.
结论:
- 非局部吸收水对植被模式的形成和生态系统的稳定性产生重大影响.
- 该模型解释了各种干旱植被模式及其转变.
- 这些发现为干旱生态系统动态和管理策略提供了新的见解.
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