Grazing-induced biodiversity loss impairs grassland ecosystem stability at multiple scales

被引:77
作者
Liang, Maowei [1 ,2 ,3 ]
Liang, Cunzhu [3 ]
Hautier, Yann [4 ]
Wilcox, Kevin R. [5 ]
Wang, Shaopeng [1 ,2 ]
机构
[1] Peking Univ, Coll Urban & Environm Sci, Inst Ecol, 3144 Room,Yi Fu Bldg 2,5 Yiheyuan Rd, Beijing 100871, Peoples R China
[2] Peking Univ, Key Lab Earth Surface Proc, Minist Educ, 3144 Room,Yi Fu Bldg 2,5 Yiheyuan Rd, Beijing 100871, Peoples R China
[3] Inner Mongolia Univ, Sch Ecol & Environm, Minist Educ, Key Lab Ecol & Resources Use Mongolian Plateau, Hohhot, Peoples R China
[4] Univ Utrecht, Dept Biol, Ecol & Biodivers Grp, Utrecht, Netherlands
[5] Univ Wyoming, Dept Ecosyst Sci & Management, Laramie, WY 82071 USA
关键词
asynchrony; grazing intensity; herbivory; metacommunity; scale dependence; sheep; DIVERSITY; PRODUCTIVITY; INSURANCE; LINKING;
D O I
10.1111/ele.13826
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
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.
引用
收藏
页码:2054 / 2064
页数:11
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