Heavy Grazing Altered the Biodiversity-Productivity Relationship of Alpine Grasslands in Lhasa River Valley, Tibet

doi:10.3389/fevo.2021.698707

	Heavy Grazing Altered the Biodiversity-Productivity Relationship of Alpine Grasslands in Lhasa River Valley, Tibet
	Xiang, Mingxue 1,3,4; Wu, Junxi 3; Wu, Jiaojiao 1; Guo, Yingjie 1,2; Lha, Duo 1; Pan, Ying 3; Zhang, Xianzhou 3,4
刊名	FRONTIERS IN ECOLOGY AND EVOLUTION
	2021-07-22
卷号	9 页码:12
关键词	aboveground biomass alpine grasslands central Tibet plant diversity productivity-diversity relationships grazing
ISSN号	2296-701X
DOI	10.3389/fevo.2021.698707
通讯作者	Lha, Duo(lhaduo@hotmail.com) ; Zhang, Xianzhou(Zhangxz@igsnrr.ac.cn)
英文摘要	Grazing is a crucial anthropogenic disturbance on grasslands. However, it is unknown how livestock grazing affects the relationship between biodiversity and productivity of alpine grasslands in Tibet. We carried out a grazing-manipulated experiment from 2016 to 2019 with grazing intensity levels of null (control, grazing exclusion, C.K.), moderate grazing [1.65 standardized sheep unit (SSU) per hectare, M.G.], and heavy grazing (2.47 SSU per hectare, H.G.) on a typical alpine grassland in the Lhasa River Basin, central Tibet. We measured aboveground biomass (AGB), species assembly (alpha and beta diversity indices), and soil nutrients' availability. The results showed that grazing differently affected plant community in different treatments. Notably, the total dissimilarity value between C.K. and H.G. is 0.334. Grazing decreased the Shannon-Wiener index, increased the Berger-Parker index from 2016 to 2018 significantly, and decreased AGB and total soil nitrogen (STN) significantly. Our results also showed that the grazing affected the relationship between AGB and diversity indices and soil nutrients, including soil organic carbon (SOC) and total soil phosphorus (STP). Specifically, AGB decreased with increasing SOC and STP in all treatments, and heavy grazing changed the positive relationships between AGB, STP, and Shannon-Wiener index to negative correlations significantly compared with grazing exclusion. There was a significant negative correlation between Berger-Parker and Shannon-Wiener indices under each treatment. The general linear models showed that H.G. altered the relationship between diversity and productivity of grassland in central Tibet, and AGB and Shannon-Wiener index positively correlated in C.K. but negatively correlated in H.G. Our study suggests that H.G. caused a negative relationship between plant diversity and productivity. Therefore, sustainable grazing management calls for a need of better understanding the relationship between biodiversity and productivity of alpine grassland in central Tibet.
资助项目	National Key Research and Development Program of China[2016YFC0502004] ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program[2019QZKK1002]
WOS关键词	SPECIES RICHNESS ; PLANT DIVERSITY ; SOIL PROPERTIES ; INNER-MONGOLIA ; ABOVEGROUND BIOMASS ; LIVESTOCK EXCLUSION ; CLIMATE-CHANGE ; SPATIAL SCALE ; CARBON ; INTENSITY
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	FRONTIERS MEDIA SA
WOS记录号	WOS:000683741500001
资助机构	National Key Research and Development Program of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) Program
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/164649]
专题	中国科学院地理科学与资源研究所
通讯作者	Lha, Duo; Zhang, Xianzhou
作者单位	1.Tibet Univ, Sch Sci, Lhasa, Peoples R China 2.Yunnan Acad Agr Sci, Inst Alpine Econ & Bot, Lijiang, Peoples R China 3.Chinese Acad Sci, Lhasa Plateau Ecosyst Res Stn, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Xiang, Mingxue,Wu, Junxi,Wu, Jiaojiao,et al. Heavy Grazing Altered the Biodiversity-Productivity Relationship of Alpine Grasslands in Lhasa River Valley, Tibet[J]. FRONTIERS IN ECOLOGY AND EVOLUTION,2021,9:12.
APA	Xiang, Mingxue.,Wu, Junxi.,Wu, Jiaojiao.,Guo, Yingjie.,Lha, Duo.,...&Zhang, Xianzhou.(2021).Heavy Grazing Altered the Biodiversity-Productivity Relationship of Alpine Grasslands in Lhasa River Valley, Tibet.FRONTIERS IN ECOLOGY AND EVOLUTION,9,12.
MLA	Xiang, Mingxue,et al."Heavy Grazing Altered the Biodiversity-Productivity Relationship of Alpine Grasslands in Lhasa River Valley, Tibet".FRONTIERS IN ECOLOGY AND EVOLUTION 9(2021):12.