植物的功能特征对竞争具有全球一致的影响
Georges Kunstler1,2,3, Daniel Falster3, David A Coomes4
1Irstea, UR EMGR, 2 rue de la Papeterie BP-76, F-38402, St-Martin-d'Hères, France.
Nature
|December 25, 2015
概括
植物的功能特征如木材密度和叶面积影响竞争,影响物种在全球森林中的共存. 这些特征在有竞争和没有竞争的表现之间产生了权衡,影响了社区集会.
科学领域:
- 生态学
- 植物生物学
- 森林科学
背景情况:
- 现象特征始终影响着个体植物生理.
- 这些对物种间竞争的影响规模尚不清楚.
- 竞争是陆地植被群体聚集的关键驱动力.
研究的目的:
- 研究关键功能特征如何影响树木的竞争性相互作用.
- 确定基于特征的竞争模型是否可以在全球森林生态系统中泛滥.
主要方法:
- 在全球14万个土地上使用了300多万棵树的生长数据.
- 分析了木材密度,特定叶面积和最大高度对竞争相互作用的影响.
主要成果:
- 快速生长与木材密度有负相关性,与生物群的特定叶面积有正相关性.
- 低木材密度和高特定叶面积与竞争能力和效果的降低有关.
- 内部竞争比内部竞争更强烈.
- 不同的特征对弱化物种间竞争的影响很小.
结论:
- 植物的功能特征会产生影响竞争动态和物种共存的权衡.
- 基于特征的方法可以在全球多样化的森林中实现普遍的竞争模型.
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