干旱区生态环境知识资源中心(Arid): Differential resistance and resilience of functional groups to livestock grazing maintain ecosystem stability in an alpine steppe on the Qinghai-Tibetan Plateau

Arid

DOI	10.1016/j.jenvman.2019.109579
	Differential resistance and resilience of functional groups to livestock grazing maintain ecosystem stability in an alpine steppe on the Qinghai-Tibetan Plateau
	Ganjurjav, Hasbagan 1; Zhang, Yong 2; Gornish, Elise S.3; Hu, Guozheng 1; Li, Yue 1; Wan, Yunfan 1; Gao, Qingzhu 1
通讯作者	Gao, Qingzhu
来源期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
ISSN	0301-4797
EISSN	1095-8630
出版年	2019
卷号	251
英文摘要	Ecosystem stability is one of the main factors maintaining ecosystem functioning and is closely related to temporal variability in productivity. Resistance and resilience reflect tolerance and recovering ability, respectively, of a plant community under perturbation, which are important for maintaining the stability of ecosystems. Generally, heavy grazing reduces the stability of grassland ecosystems, causing grassland degradation. However, how livestock grazing affects ecosystem stability is unclear in alpine steppe ecosystems. We conducted a five-year grazing experiment with Tibetan sheep in a semi-arid alpine steppe on the Qinghai-Tibetan Plateau, China. The experimental treatments included no grazing (NG), light grazing (LG, 2.4 sheep per ha), moderate grazing (MG, 3.6 sheep per ha) and heavy grazing (HG, 6.0 sheep ha). We calculated resistance and resilience of three plant functional groups and ecosystem stability under the three grazing intensities using aboveground primary productivity. The results showed that with increasing grazing intensity, aboveground biomass of each functional group significantly decreased. As grazing intensity increased, the resistance of forbs first increased then decreased. The resilience of graminoids in HG was significantly lower than in LG plots, but the resilience of legumes in HG was higher than in LG and MG plots. The resilience of graminoids was significantly higher than legume and forbs under LG and MG treatments. In HG treatments, resilience of legumes was higher than graminoids and forbs. Ecosystem stability did not change under different grazing intensities, because of dissimilar performance of the resilience and resistance of functional groups. Our results highlight how the differential resistance and resilience of different function groups facilitate the tolerance of alpine steppe to grazing under even a heavy intensity. However, the degradation risk of alpine steppe under heavy grazing still needs to be considered in grassland management due to sharp decreases of productivity.
英文关键词	Rotational grazing Community composition Regrowth ability Biomass production Semiarid alpine grassland Cold region
类型	Article
语种	英语
国家	Peoples R China ; USA
收录类别	SCI-E
WOS记录号	WOS:000494052300051
WOS关键词	VEGETATION ; DIVERSITY ; RESPONSES ; BIODIVERSITY ; GRASSLANDS ; PATTERNS ; FUTURE ; SHIFTS
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
EI主题词	2019-12-01
来源机构	University of Arizona
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311351
作者单位	1.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, 12 South St Zhongguancun, Beijing 100081, Peoples R China; 2.Southwest Forestry Univ, Coll Wetlands, Natl Plateau Wetlands Res Ctr, Kunming 650224, Yunnan, Peoples R China; 3.Univ Arizona, Sch Nat Resources & Environm, Tucson, AZ 85821 USA
推荐引用方式 GB/T 7714	Ganjurjav, Hasbagan,Zhang, Yong,Gornish, Elise S.,et al. Differential resistance and resilience of functional groups to livestock grazing maintain ecosystem stability in an alpine steppe on the Qinghai-Tibetan Plateau[J]. University of Arizona,2019,251.
APA	Ganjurjav, Hasbagan.,Zhang, Yong.,Gornish, Elise S..,Hu, Guozheng.,Li, Yue.,...&Gao, Qingzhu.(2019).Differential resistance and resilience of functional groups to livestock grazing maintain ecosystem stability in an alpine steppe on the Qinghai-Tibetan Plateau.JOURNAL OF ENVIRONMENTAL MANAGEMENT,251.
MLA	Ganjurjav, Hasbagan,et al."Differential resistance and resilience of functional groups to livestock grazing maintain ecosystem stability in an alpine steppe on the Qinghai-Tibetan Plateau".JOURNAL OF ENVIRONMENTAL MANAGEMENT 251(2019).