Differential Response of Community Biomass Temporal- and Spatial- Stabilities to Nitrogen Addition in an Alpine Meadow on the Tibetan Plateau

IF 2.7 3区环境科学与生态学 Q2 ECOLOGY

Journal of Vegetation Science Pub Date : 2025-06-25 DOI:10.1111/jvs.70046

Yang Bai, Wenjun Wang, Zhenyu Luo, Tong'an Wei, Pengfei Zhang

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引用次数: 0

Abstract

Questions

Community-level stability includes both temporal and spatial dimensions, yet most research has focused on temporal aspects. While considerable progress has been made in understanding community-level temporal stability (α temporal stability), including its interactions with temporal stability at smaller scales (e.g., population or species level) and broader spatial scales (β and γ temporal stability), our understanding of spatial stability at the same community level (α spatial stability or spatial autocorrelation) and its connections to species-level spatial stability and spatial asynchrony remains limited.

Location

An alpine meadow on the Tibetan Plateau, China.

Methods

Using 5 years of data from a nitrogen addition experiment conducted in an alpine meadow on the Tibetan Plateau, we examine the impacts of nitrogen addition on both temporal and spatial stabilities of community biomass, considering species richness, asynchrony, and stability of all species, as well as of dominant and other non-dominant species.

Results

Nitrogen addition influenced the temporal and spatial stability of community biomass by altering the temporal and spatial asynchrony of dominant species and of the overall species level. In this alpine meadow with high species richness, temporal stability of community biomass increased despite a decline in species richness, while spatial stability of community biomass remained unaffected. These results suggest that dominant species dynamics can enhance temporal stability under nutrient enrichment, even as diversity decreases.

Conclusion

Dominant species play a key role in regulating the temporal and spatial stability of community biomass, and the two dimensions of stability respond differently to nitrogen addition. These findings emphasize the importance of incorporating both spatial and temporal facets of stability into ecological theory and ecosystem management under global change.

Abstract Image

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青藏高原高寒草甸群落生物量时空稳定性对氮添加的差异响应

社区水平的稳定性包括时间和空间两个维度，但大多数研究都集中在时间方面。虽然在了解群落水平的时间稳定性（α时间稳定性），包括其与更小尺度（如种群或物种水平）和更大空间尺度（β和γ时间稳定性）的时间稳定性的相互作用方面取得了相当大的进展，我们对同一群落水平的空间稳定性（α空间稳定性或空间自相关）及其与物种水平的空间稳定性和空间不同步的联系的理解仍然有限。位于中国青藏高原的高山草甸。方法利用青藏高原高寒草甸5年的氮添加实验数据，从物种丰富度、非同步性和稳定性、优势种和其他非优势种两方面考察氮添加对群落生物量时空稳定性的影响。结果氮素添加通过改变优势种和总体物种水平的时空非同时性影响群落生物量的时空稳定性。在物种丰富度较高的高寒草甸，群落生物量的时间稳定性有所提高，但物种丰富度有所下降，而群落生物量的空间稳定性未受影响。这些结果表明，即使多样性减少，优势种动态也能增强养分富集下的时间稳定性。结论优势种在调节群落生物量的时空稳定性中起关键作用，且稳定性的两个维度对氮素添加的响应不同。这些发现强调了在全球变化下将稳定性的空间和时间两个方面纳入生态学理论和生态系统管理的重要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Vegetation Science 环境科学-林学

CiteScore

6.00

自引率

3.60%

发文量

审稿时长

2 months

期刊介绍： The Journal of Vegetation Science publishes papers on all aspects of plant community ecology, with particular emphasis on papers that develop new concepts or methods, test theory, identify general patterns, or that are otherwise likely to interest a broad international readership. Papers may focus on any aspect of vegetation science, e.g. community structure (including community assembly and plant functional types), biodiversity (including species richness and composition), spatial patterns (including plant geography and landscape ecology), temporal changes (including demography, community dynamics and palaeoecology) and processes (including ecophysiology), provided the focus is on increasing our understanding of plant communities. The Journal publishes papers on the ecology of a single species only if it plays a key role in structuring plant communities. Papers that apply ecological concepts, theories and methods to the vegetation management, conservation and restoration, and papers on vegetation survey should be directed to our associate journal, Applied Vegetation Science journal.