Divergent responses of ecological functions to long-term herbivore exclusion in the Tibetan mountainous grasslands
文献类型： 外文期刊
作者： Bai, Shuaihao 1 ; Zhao, Jingxue 1 ; Qu, Guangpeng 3 ; Tian, Lihua 4 ; Wu, Gao-Lin 6 ;
作者机构： 1.Lanzhou Univ, State Key Lab Herbage Improvement & Grassland Agro, Lanzhou 730000, Peoples R China
2.Lanzhou Univ, Coll Ecol, Lanzhou 730000, Peoples R China
3.Tibet Acad Agr & Anim Husb Sci, Inst Grassland Sci, State Key Lab Hulless Barley & Yak Germplasm Resou, Lhasa 850002, Peoples R China
4.Southwest Minzu Univ, Sichuan Zoige Alpine Wetland Ecosyst Natl Observat, Chengdu 610041, Peoples R China
5.Southwest Minzu Univ, Coll Grassland Resources, Chengdu 610041, Peoples R China
6.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
关键词： Alpine grasslands; Grazing exclusion; Ecosystem multifunctionality
期刊名称：AGRICULTURE ECOSYSTEMS & ENVIRONMENT （ 影响因子：6.4； 五年影响因子：6.8 ）
ISSN： 0167-8809
年卷期： 2025 年 393 卷
页码：
收录情况： SCI
摘要： Herbivore exclusion is a widespread practice used to restore and manage degraded grasslands on the Tibetan Plateau. However, experimental evidence for the long-term impacts of herbivore exclusion on ecosystem structure and functioning of mountainous grasslands is still largely lacking. Here, we examined long-term herbivore exclusion impacts on ecological functions across four typical grassland types (alpine screes, alpine meadow, alpine steppe, and swamp meadow) along an elevation gradient on the southern slope of Nyaiqentanglha Mountain. The results showed that long-term herbivore exclusion had divergent influences on ecosystem functioning of mountainous grasslands, with the EMF tended to decrease in swamp meadow and alpine steppe but increase in alpine meadow and alpine screes. In addition, herbivore exclusion tended to decrease the aboveground ecosystem multifunctionality (AEMF) but had a trend to increase the belowground ecosystem multifunctionality (BEMF). Path analysis of the structural equation model showed that herbivore exclusion regulated EMF and BEMF mainly through altering plant productivity and soil nutrients while influenced the AEMF primary by affecting plant diversity. These findings revealed that the impacts of long-term herbivore exclusion on multiple ecological functions greatly depended on plant diversity, productivity, and soil nutrients, with the mountainous grasslands mostly experiencing decrease trends on ecosystem multi-functionality. The findings also highlighted the fundamental importance of developing proper grazing management practice for protecting ecosystem multifunctionality in the widespread mountainous grasslands on the Tibetan Plateau.
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