灾难性和非灾难性种群在一个双系统中崩,为合作的捕食者提供动态的额外食物供应
Saswati Biswas1, Arindam Mandal2, Samares Pal3
1Department of Mathematics, School of Natural Sciences, Shiv Nadar Institution of Eminence, Gautam Buddha Nagar, Uttar Pradesh 201314, India.
Physical review. E
|March 16, 2024
概括
合作性捕食者的猎物恐惧影响了生存. 额外的食物和猎物避难所影响系统稳定性,可能导致多个稳定状态和可预测的人口崩,使用早期预警信号.
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:
- 捕食者的合作狩猎可以引起猎物的恐惧,改变它们的出生和死亡率.
- 猎物避难所和额外的粮食资源是影响捕食者-猎物系统稳定的关键因素.
- 在不同的环境条件下,生态系统可以表现出复杂的动态,包括多个稳定状态和歇斯底里.
研究的目的:
- 为了研究猎物捕食者系统的动态,使用额外的食物资源和恐惧诱导的猎物行为.
- 分析猎物避难所,食物质量/数量以及捕食者合作对系统稳定性和持久性的影响.
- 探索使用早期预警信号的倾斜事件,噪音诱导的切换以及人口崩的可预测性.
主要方法:
- 猎物捕食者系统的数学建模,包括恐惧,猎物避难所和捕食者的额外食物.
- 分析分叉场景 (结,向后分叉) 以了解系统稳定性和多重平衡.
- 随机环境模拟以检查关键过渡,倾斜事件和噪音诱导的切换.
- 研究早期预警信号,特别是红移噪声,用于预测人口崩.
主要成果:
- 增加恐惧强度可以通过缓解强烈的捕食者合作引起的不稳定性来稳定系统.
- 高水平的猎物避难所不利于捕食者的生存;充足的额外食物支持系统的持久性和稳定性.
- 在相同的条件下,系统可以呈现两个稳定的配置,其中歇斯底里效应受庇护和食物可用性的影响.
- 两叉引发的倾斜事件和噪声引发的切换发生在随机环境中,食物资源的时间变化.
- 早期预警信号显示,有可能预测与食物变化相关的人口崩.
结论:
- 恐惧,猎物避难所和额外的食物是猎物捕食者系统动态和稳定的关键调节者.
- 该系统的复杂性允许多个稳定状态和临界点,强调环境随机性的重要性.
- 使用早期预警信号的预测模型可以帮助管理人口并防止在可变环境中发生机.
- 研究结果为开发社区生态中的控制策略提供了洞察力,特别是在资源管理和掠食者与猎物的相互作用方面.
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