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积极和消极的植物间相互作用影响着高海拔和低海拔的苗木建立

Chantal M Hischier¹, Janneke Hille Ris Lambers¹, Evelin Iseli¹

¹Institute of Integrative Biology, ETH Zürich, 8092 Zürich, Switzerland.

Alpine botany

|July 5, 2024

概括

植物的相互作用从竞争转变为沿着环境梯度的促进. 这项研究发现,积极和消极的植物相互作用同时发生,影响了山地草原社区的聚集和物种的建立.

科学领域:

生态生态学生态生态学
植物共同体生态学植物共同体生态学
环境科学环境科学

背景情况:

了解植物之间的相互作用对于预测社区聚集和对环境变化的反应至关重要.
互动预计将沿环境严重度梯度从竞争 (负面) 转向促进 (积极).
之前的研究往往忽视了正面和负面相互作用的同时相互作用.

研究的目的:

为了调查山地草原植物的苗木建立是如何受邻近植被影响的.
通过操纵邻国存在和资源竞争来解开竞争和促进的影响.

主要方法:

在两个海拔处比较了10种草原植物的苗木机构.
使用了三种处理方法:邻居的存在,邻居的不存在和人工植被 (模仿促进,同时减少竞争).
在不同的相互作用场景下分析了设立率.

主要成果:

在低海拔地点观察到净正相互作用,在高海拔地点观察到净负相互作用.
低海拔草的竞争对高海拔地区产生了负面影响.
人工植被处理显示出最高的建立率,表明有积极的地表效应,但这些部分被负面的地下竞争所抵消.

结论:

竞争和促进两者共同作用,影响跨环境梯度的社区结构.
即使在温带山区的高海拔地区,竞争也可能是显著的.
在不断变化的环境下,植物相互作用在塑造山地植物群落中发挥着关键作用.

关键词:

竞争竞争竞争竞争促成便利化促成便利化范围转移范围的范围转移范围.压力梯度假设压力梯度假设生命力比率是指生命力比率.

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