营养-植物-副产品系统中的延迟动力学和排毒:驱动开花稳定性和振荡的机制
Randhir Singh Baghel1, Shrikant Verma2, Narendra Khatri3
1Department of Mathematics, Poornima University, Jaipur, 303905, Rajasthan, India.
Scientific reports
|December 21, 2025
概括
植物浮游生物的开花是由营养吸收,生长和抑制的副产品调节的. 我们的模型表明,排毒延迟会导致花波动,但稳定状态在现实情景中更常见.
科学领域:
- 生态建模 生态建模
- 水生微生物生态学 水生微生物生态学
- 生物地质化学循环是什么
背景情况:
- 植物浮游生物的繁荣是一个复杂的现象,由营养动力学,生物量增长和毒素等抑制性副产品的释放驱动.
- 了解控制开花开始,持续和终止的因素对于水生生态系统管理至关重要.
研究的目的:
- 开发和分析营养素-浮游植物-副产品相互作用的机械模型.
- 调查副产品介导的抑制和营养依赖性排毒在调节开花动态中的作用.
- 确定控制稳定和振荡式繁荣制度之间的过渡的关键参数和条件.
主要方法:
- 开发一种结合营养素-浮游植物-副产品模型,结合Beddington-DeAngelis营养吸收动力学.
- 包括线性稳定性和分叉分析在内的分析技术用于研究系统动态并确定关键值.
- 全球灵敏度分析 (PRCC和Sobol指数) 用于确定各种参数对开花稳定性和阻尼性的影响.
- 数字模拟以确认分析结果,并探索霍夫分叉和振荡行为.
主要成果:
- 该模型证明了生物可行性和局限性,有一个明确的值来规范开花的开始.
- 排毒延迟被确定为可以触发振荡式繁荣动态的关键因素.
- 在生态现实的条件下,系统主要汇聚到一个稳定的共存状态,直接或通过缓和的振荡.
- 敏感性分析显示,副产品的产生,抑制强度,解毒率,与毒素相关的死亡率和和效应是稳定性和抑制时间的关键调节因素.
- 显而易见的生态延迟可能导致Hopf分叉,诱导持续的振荡.
结论:
- 该研究提供了一个定量框架,用于区分暂时和持续的植物浮游生物繁殖振荡.
- 排毒过程和延迟反机制被确定为影响开花动态和制度转变的关键生态因素.
- 这些发现为预测和管理水生生态系统中的植物浮游生物开花行为提供了洞察力.
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