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实现对水生动物食物链长度变化的机制性理解

Guanming Guo¹, György Barabás^2,3, Gaku Takimoto⁴

¹Key Laboratory of Poyang Lake Wetland and Watershed Research, School of Geography and Environment, Jiangxi Normal University, Nanchang, China.

Ecology letters

|September 11, 2023

概括

这项研究解释了为什么水生动物食物链的长度有所不同. 一个新的模型显示生态系统的大小,生产力和干扰会产生复杂的,非线性食物网反应.

科学领域:

生态生态学生态生态学
理论生态学理论生态学
水生生态学水生生态学

背景情况:

生态学家研究水生食物链长度 (FCL) 的变化.
诸如生态系统大小,资源生产率和干扰等假设驱动因素显示出混合的经验结果.
需要一个统一的框架来解释这些FCL变异.

研究的目的:

为复杂的食物网开发一个统一的竞争-殖民框架.
机械解释观测到的水生食物链长度 (FCL) 的变化.
将生态系统的大小,资源生产率和干扰作为关键驱动因素纳入其中.

主要方法:

为复杂的食物网开发了一个统一的竞争-殖民模式.
在基底物种之间结合的竞争-殖民权衡.
分析了FCL对不同环境驱动因素的反应的模型预测.

主要成果:

生态系统的大小通常预测FCL的单调增加.
资源生产率和干扰显示非线性,振荡式FCL响应在大型,不太受干扰或高生产力的生态系统中.
模型预测与FCL可变性的经验观测一致.

结论:

竞争-殖民框架为水生FCL变异提供了一种机制性的解释.
大小,生产力和干扰等环境因素相互作用,塑造食物网结构.
这项研究协调了关于FCL驱动器的混合经验发现.

关键词:

竞争 - 殖民化的权衡.干扰是一种干扰.生态系统的大小生态系统的大小食物链的长度食物链的长度多个环境驱动因素.资源生产率资源生产率

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