应用率对温带草原多维植物多样性和生态系统生产之间的关系的影响
Gossaye Hailu Debaba1, Kunyu Li1, Xiaowei Wang1
1International Joint Research Laboratory for Global Change Ecology, School of Life Sciences, Henan University, Kaifeng 475004, China.
Biology
|August 28, 2024
概括
沉积影响温带草原生态系统,改变了植物多样性和生物质生产. 虽然分类学和遗传学多样性关系仍然强大,但功能多样性相关性随着水平的增加而变化.
科学领域:
- 生态生态学 生态生态学
- 全球变化生物学
- 植物生态学植物生态学
背景情况:
- (N) 沉积是影响陆地生态系统的重要全球变化驱动因素.
- 以前的研究往往只关注物种丰富度 (SR) 和有限的N添加水平,使多维植物多样性-生态系统功能关系在不同的N沉积率下不清楚.
研究的目的:
- 调查N添加梯度对植物多样性指标 (分类学,植物遗传学,功能) 和温带草原生态系统生产之间的关系的影响.
- 了解不同的N沉积率如何影响这些关系,考虑多个多样性维度.
主要方法:
- 在温带草原中进行了一项带有N加值梯度 (0-64 g N m-2 yr-1) 的实地实验.
- 对分类学多样性 (SR),植物遗传多样性 (NRI),功能多样性 (FDis-高度,FDis-) 和社区加权平均值 (CWM高度,CWM) 的评估影响.
- 评估了多样性指标和生物质生产在N添加水平之间的关系.
主要成果:
- 生态系统的产量最初随着N的增加而增加,达到47gNm-2yr-1的峰值,然后下降.
- 添加减少了SR,FDis-高度,FDis-和NRI,同时增加了CWM高度和CWM.
- 添加N并没有改变SR,NRI和FDis-Height的生产关系,但显著影响了FDis-Chlorophyll,CWMHeight和CWMChlorophyll的相关性.
结论:
- 植物多样性-生态系统功能关系对于分类学和遗传学多样性是强大的,但在N沉积下对功能多样性有所不同.
- 基于特征的方法对于理解植物多样性-生态系统功能动态在应对全球变化的过程中至关重要,特别是沉积.
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