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在一个亚热带森林实验中,个体内叶子特征对当地光线可用性和生物多样性的反应

Tobias Proß^1,2, Helge Bruelheide^1,2, Sylvia Haider³

¹Institute of Biology, Geobotany and Botanical Garden, Martin Luther University Halle-Wittenberg, Halle, Saxony-Anhalt, Germany.

|July 18, 2025

概括

生物多样性通过改变个体内叶子特征变异来影响生态系统功能. 邻近的树木和物种丰富性影响了叶子特征对光的反应,揭示了避免竞争的机制.

科学领域:

生态生态学生态生态学
植物生物学植物生物学
森林科学森林科学森林科学

背景情况:

叶子的特征是生态系统功能的关键指标,表现出物种之间和物种内部的变化.
由于测量的局限性,个体内叶子特征的变化往往被忽视,尽管它具有潜在的生态意义.
光的可用性受到周围植被和树冠结构的影响,显著影响了叶子特征值.

研究的目的:

调查叶子特征值如何响应光线的可用性和邻近树木物种丰富性在一个亚热带森林种植园的个人层面.
为了确定直接邻居或整体物种丰富性是否对单个树木中的光特征关系产生更大的影响.
评估个体内叶子特征变异在调解生物多样性对生态系统功能影响中的作用.

主要方法:

在BEF-中国 (生物多样性-生态系统运行中国) 亚热带森林种植园的垂直光度梯度上采样了叶子,从单一种植到24种物种的混合物.
配对的叶子样本与基于传感器的测量光的可用性.
利用可见光和近红外光谱 (3502500nm) 来预测来自15种本土树种的4981个叶子中的14个叶子特征.

主要成果:

大多数叶子特征都对光线的可用性做出了反应,在落叶物种和常青物种之间观察到差异.
树种丰富和直接邻居改变了个体层面的光特征关系.
在某些情况下,直接邻居对叶子特征的影响比当地物种丰富程度更大,特别是在同种类的常青对中,特定的叶面积和叶子对光线的反应更强.

结论:

生物多样性通过其对个体内叶子特征变异的影响影响生态系统功能.
单个树木中的光,生物多样性和叶子特征之间的相互作用是生物多样性研究的关键因素.
观察到的个体内特征反应表明了避免物种内部竞争的机制.

关键词:

在BEF-中国.现场规格现场规格现场规格护士们的护士们视光/红外光谱法视光/红外光谱法叶子的习惯叶子的习惯叶子特征变化叶子特征变化叶子的特征叶子的特征光的可用性,光的可用性.现型性可塑性现型性可塑性亚热带森林是一个亚热带森林.

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