功能特征多样性的变化介导养分添加对草地稳定性的影响

IF 5.3 1区 环境科学与生态学 Q1 ECOLOGY
Qingqing Chen, Shaopeng Wang, Eric W. Seabloom, Forest Isbell, Elizabeth T. Borer, Jonathan D. Bakker, Siddharth Bharath, Christiane Roscher, Pablo Luis Peri, Sally A. Power, Ian Donohue, Carly Stevens, Anne Ebeling, Carla Nogueira, Maria C. Caldeira, Andrew S. MacDougall, Joslin L. Moore, Sumanta Bagchi, Anke Jentsch, Michelle Tedder, Kevin Kirkman, Juan Alberti, Yann Hautier
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引用次数: 0

摘要

养分富集会影响草地植物的多样性,如物种丰富度、功能性状组成和多样性,但这些变化是否以及如何在极端气候日益加剧的情况下影响生态系统的稳定性,在很大程度上仍是未知数。我们在 10 个长期草地实验点量化了养分添加(氮、磷和钾)对地上生物量生产稳定性的直接影响和多样性介导的影响。我们对稳定性的五个方面进行了测量,包括时间不变性、极端干旱和潮湿生长季节期间的抵抗力以及极端干旱和潮湿生长季节之后的恢复力。叶片性状(叶片碳、氮、磷、钾和比叶面积)是在田间环境和营养添加条件下测量的,用于构建叶片经济光谱(LES)。我们计算了叶片经济谱和单叶性状的功能性状组成和多样性。我们量化了种内性状变化和物种替代对功能性状组成变化的贡献,以应对养分添加及其对生态系统稳定性的影响。养分添加主要通过种内性状转移降低了功能性状多样性,并促使草地群落向LES较快的一端移动,这表明要准确预测生态系统的稳定性,应将种内性状转移包括在内。此外,LES 功能特征多样性的变化反过来又影响了稳定性的不同方面。尽管如此,这些多样性介导的影响总体上较弱,并且/或者被营养物质添加对稳定性的直接影响所压倒。因此,营养物质的添加并没有对任何稳定性方面产生强烈影响。利用单个叶片性状得出的这些结果基本一致,但主要途径有所不同。重要的是,使用从全球性状数据库(如 TRY)中提取的平均性状值时,主要影响途径有所不同。综述。研究植物多样性多个方面的变化及其在养分富集等全球变化下对多维稳定性的影响,可以提高我们对维持生态系统稳定性的过程和机制的认识。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Change in functional trait diversity mediates the effects of nutrient addition on grassland stability

Change in functional trait diversity mediates the effects of nutrient addition on grassland stability

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来源期刊
Journal of Ecology
Journal of Ecology 环境科学-生态学
CiteScore
10.90
自引率
5.50%
发文量
207
审稿时长
3.0 months
期刊介绍: Journal of Ecology publishes original research papers on all aspects of the ecology of plants (including algae), in both aquatic and terrestrial ecosystems. We do not publish papers concerned solely with cultivated plants and agricultural ecosystems. Studies of plant communities, populations or individual species are accepted, as well as studies of the interactions between plants and animals, fungi or bacteria, providing they focus on the ecology of the plants. We aim to bring important work using any ecological approach (including molecular techniques) to a wide international audience and therefore only publish papers with strong and ecological messages that advance our understanding of ecological principles.
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