期刊
ECOLOGY LETTERS
卷 24, 期 10, 页码 2054-2064出版社
WILEY
DOI: 10.1111/ele.13826
关键词
asynchrony; grazing intensity; herbivory; metacommunity; scale dependence; sheep
类别
资金
- National Key Research and Development Program of China [2016YFC0500503]
- Natural Science Foundation of China [31988102, 31870505]
- Open Project Program of 'Ministry of Education Key Laboratory of Ecology and Resources Use of the Mongolian Plateau' [KF2020003]
Livestock grazing affects grassland stability differently at different scales, increasing species stability but decreasing local community stability, ultimately reducing stability at larger spatial scales. Maintaining biodiversity across scales is crucial for the sustainability of grassland ecosystem functions and services.
Livestock grazing is a major driver shaping grassland biodiversity, functioning and stability. Whether grazing impacts on grassland ecosystems are scale-dependent remains unclear. Here, we conducted a sheep-grazing experiment in a temperate grassland to test grazing effects on the temporal stability of productivity across scales. We found that grazing increased species stability but substantially decreased local community stability due to reduced asynchronous dynamics among species within communities. The negative effect of grazing on local community stability propagated to reduce stability at larger spatial scales. By decreasing biodiversity both within and across communities, grazing reduced biological insurance effects and hence the upscaling of stability from species to communities and further to larger spatial scales. Our study provides the first evidence for the scale dependence of grazing effects on grassland stability through biodiversity. We suggest that ecosystem management should strive to maintain biodiversity across scales to achieve sustainability of grassland ecosystem functions and services.
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