在局部和更大的空间尺度上,地表和地下生产力稳定性对氮添加的解耦响应

IF 10.8 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Global Change Biology Pub Date : 2022-01-30 DOI:10.1111/gcb.16090
Guo-Jiao Yang, Yann Hautier, Zi-Jia Zhang, Xiao-Tao Lü, Xing-Guo Han
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引用次数: 17

摘要

净初级生产力(NPP)的时间稳定性对于预测全球变化下生态系统服务的可靠供给具有重要意义。虽然已知氮(N)添加会影响地上净初级生产力(ANPP)的时间稳定性,但尚不清楚它如何影响地下净初级生产力(BNPP)和NPP的时间稳定性,以及这种影响是否具有规模依赖性。本研究以草地为例,研究了局地尺度上ANPP和BNPP稳定性对N添加的不同响应,并在更大的空间尺度上传播。即在两个尺度上,N的添加显著降低了ANPP的稳定性,但不影响BNPP和NPP的稳定性。群落间ANPP和BNPP的空间非同步性提供了更大尺度上的稳定性,不受N添加的影响。我们的研究结果挑战了基于地上动态结果的氮添加会降低生态系统稳定性的传统观点,从而强调了从整个系统角度看待生态系统稳定性的重要性。
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Decoupled responses of above- and below-ground stability of productivity to nitrogen addition at the local and larger spatial scale

Temporal stability of net primary productivity (NPP) is important for predicting the reliable provisioning of ecosystem services under global changes. Although nitrogen (N) addition is known to affect the temporal stability of aboveground net primary productivity (ANPP), it is unclear how it impacts that of belowground net primary productivity (BNPP) and NPP, and whether such effects are scale dependent. Here, using experimental N addition in a grassland, we found different responses of ANPP and BNPP stability to N addition at the local scale and that these responses propagated to the larger spatial scale. That is, N addition significantly decreased the stability of ANPP but did not affect the stability of BNPP and NPP at the two scales investigated. Additionally, spatial asynchrony of both ANPP and BNPP among communities provided greater stability at the larger scale and was not affected by N addition. Our findings challenge the traditional view that N addition would reduce ecosystem stability based on results from aboveground dynamics, thus highlighting the importance of viewing ecosystem stability from a whole system perspective.

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来源期刊
Global Change Biology
Global Change Biology 环境科学-环境科学
CiteScore
21.50
自引率
5.20%
发文量
497
审稿时长
3.3 months
期刊介绍: Global Change Biology is an environmental change journal committed to shaping the future and addressing the world's most pressing challenges, including sustainability, climate change, environmental protection, food and water safety, and global health. Dedicated to fostering a profound understanding of the impacts of global change on biological systems and offering innovative solutions, the journal publishes a diverse range of content, including primary research articles, technical advances, research reviews, reports, opinions, perspectives, commentaries, and letters. Starting with the 2024 volume, Global Change Biology will transition to an online-only format, enhancing accessibility and contributing to the evolution of scholarly communication.
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