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遗留的同类型密度依赖的意想不到的影响

Lukas J Magee¹, Joseph A LaManna², Amy T Wolf³

¹School of Forest, Fisheries, and Geomatics Sciences, University of Florida, Gainesville, Florida, USA.

Ecology letters

|June 10, 2024

概括

植物死亡遗产显著影响森林动态,死树对生存的影响是活树的四倍. 这些遗留效应改变了社区的组成和生物多样性.

科学领域:

生态生态学生态生态学
森林科学森林科学森林科学
社区动力学社区动力学

背景情况:

植物竞争影响社区结构和多样性.
死亡邻居造成的负面影响的持续存在 (遗留效应) 可以改变生态动态.
之前的研究可能低估了密度依赖相互作用,并没有考虑遗留效应.

研究的目的:

研究死树遗留效应对森林生态系统中活树生存的影响.
量化和比较遗留的同类效应对树木存活的同类效应的强度.
确定遗留效应如何影响物种多样性和社区组成.

主要方法:

在一个映射的森林中,模拟了23个物种中的37,212棵树的生存情况.
分析了四个社区属性:生活同类密度,生活异种密度,遗留的同类密度和遗留的异种密度.
量化了这些邻居物业对年度树木存活率的影响.

主要成果:

遗留的同种效应几乎是活着的同种效应对树木生存的影响的四倍.
由于遗留的同物种密度导致的年生存率的变化比生活同物种效应的变化大1.5%.
超过90%的物种受到遗留同物种密度的负面影响,相比之下,生活同物种密度的影响为47%.

结论:

死树的遗产显著改变了森林社区的动态.
过去邻居的影响 (遗留效应) 是密度依赖相互作用的关键因素.
未来的生态研究必须纳入遗留效应,以准确评估物种相互作用和社区动态.

关键词:

生态记忆生态记忆森林动态图片图片森林动态图片长期动态长期动态邻里影响邻里影响种类的共存种类的共存

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