气候变化领域集成服务门户(CCPortal): How does grazing exclusion influence plant productivity and community structure in alpine grasslands of the Qinghai-Tibetan Plateau?

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DOI	10.1016/j.gecco.2020.e01066
	How does grazing exclusion influence plant productivity and community structure in alpine grasslands of the Qinghai-Tibetan Plateau?
	Liu X.; Ma Z.; Huang X.; Li L.
发表日期	2020
ISSN	16726316
卷号	23
英文摘要	Grazing exclusion by fencing is a commonly used management practice for restoring the degraded alpine grasslands on the Qinghai-Tibetan Plateau (QTP). However, there is currently no consensus on how grazing exclusion influences plant productivity and community structure in alpine grasslands in this region. Here, a meta-analysis was conducted to quantitatively assess the impacts of grazing exclusion on plant biomass (aboveground biomass, AGB; belowground biomass, BGB; and total biomass, TB) and various plant diversity indices (species richness, Shannon-Wiener diversity index, and Pielou evenness index) in alpine grasslands on the QTP. The results showed that on average, grazing exclusion significantly increased plant coverage, AGB, BGB, TB, and species richness by 34.4%, 93.1%, 58.0%, 67.4%, and 8.3%, respectively. In contrast, significant reductions in both Shannon-Wiener diversity index (−6.7%) and Pielou evenness index (−6.1%) were detected following grazing exclusion. It was observed that the effectiveness of grazing exclusion on recovering plant coverage, AGB, TB, and species richness decreased with the duration of grazing exclusion, and the effect size of plant species richness was negatively correlated to the duration of grazing exclusion. These results indicated that plant species might decrease with the duration of grazing exclusion. The increases in AGB, BGB, and TB were all significantly higher in alpine meadow than those in alpine steppe and alpine desert steppe, demonstrating that grazing exclusion was more effective in promoting plant productivity in alpine meadow than in the other two grassland types. However, the effects of grazing exclusion on plant diversity indices did not differ significantly among the three grassland types. The research suggest that grazing exclusion is an effective way to recover plant productivity and diversity in alpine grassland of the QTP, especially in alpine meadow, and the period of grazing exclusion should be related to the state and function of the grassland. © 2020 The Authors
英文关键词	Alpine region; Grassland; Grazing exclusion; Plant biomass; Plant diversity
语种	英语
scopus关键词	Global Ecology and Conservation
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158408
作者单位	State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, 810016, China; College of Eco-Environmental Engineering, Qinghai University, Xining, 810016, China; Key Laboratory of Restoration Ecology for Cold Regions in Qinghai, NorthwestInstitute of Plateau Biology, Chinese Academy of Sciences, Xining, 810008, China; State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecologyand Geography, Chinese Academy of Sciences, Urumqi, 830011, China; Yili Staion for Watershed Ecosystem Research, Chinese Academy of Sciences, Xinyuan, 835800, China
推荐引用方式 GB/T 7714	Liu X.,Ma Z.,Huang X.,et al. How does grazing exclusion influence plant productivity and community structure in alpine grasslands of the Qinghai-Tibetan Plateau?[J],2020,23.
APA	Liu X.,Ma Z.,Huang X.,&Li L..(2020).How does grazing exclusion influence plant productivity and community structure in alpine grasslands of the Qinghai-Tibetan Plateau?.,23.
MLA	Liu X.,et al."How does grazing exclusion influence plant productivity and community structure in alpine grasslands of the Qinghai-Tibetan Plateau?".23(2020).