Disentangling climatic and anthropogenic contributions to nonlinear dynamics of alpine grassland productivity on the Qinghai-Tibetan Plateau

doi:10.1016/j.jenvman.2020.111875

	Disentangling climatic and anthropogenic contributions to nonlinear dynamics of alpine grassland productivity on the Qinghai-Tibetan Plateau
	Wu, Jianshuang 4,5; Li, Meng 3,6; Zhang, Xianzhou 6; Fiedler, Sebastian 1,5,9; Gao, Qingzhu 4; Zhou, Yuting 2; Cao, Wenfang 4,7; Hassan, Waseem 4; Ciprian, Mihai 8; Tarolli, Paolo 7
刊名	JOURNAL OF ENVIRONMENTAL MANAGEMENT
	2021-03-01
卷号	281 页码:10
关键词	Anthropogenic impacts Climate fluctuations Ecosystem non-linearity Grassland productivity Human disturbance Vegetation dynamics
ISSN号	0301-4797
DOI	10.1016/j.jenvman.2020.111875
通讯作者	Wu, Jianshuang(wujianshuang@caas.cn)
英文摘要	Alpine grasslands on the Qinghai-Tibetan Plateau are sensitive and vulnerable to climate change and human activities. Climate warming and overgrazing have already caused degradation in a large fraction of alpine grasslands on this plateau. However, it remains unclear how human activities (mainly livestock grazing) regulates vegetation dynamics under climate change. Here, alpine grassland productivity (substituted with the normalized difference vegetation index, NDVI) is hypothesized to vary in a nonlinear trajectory to follow climate fluctuations and human disturbances. With generalized additive mixed modelling (GAMM) and residual-trend (RESTREND) analysis together, both magnitude and direction of climatic (in terms of temperature, precipitation, and radiation) and anthropogenic impacts on NDVI variation were examined across alpine meadows, steppes, and desert-steppes on the Qinghai-Tibetan Plateau. The results revealed that accelerating warming and greening, respectively, took place in 76.2% and 78.8% of alpine grasslands on the Qinghai-Tibetan Plateau. The relative importance of temperature, precipitation, and radiation impacts was comparable, between 20.4% and 24.8%, and combined to explain 66.2% of NDVI variance at the pixel scale. The human influence was strengthening and weakening, respectively, in 15.5% and 14.3% of grassland pixels, being slightly larger than any sole climatic variable across the entire plateau. Anthropogenic and climatic factors can be in opposite ways to affect alpine grasslands, even within the same grassland type, likely regulated by plant community assembly and species functional traits. Therefore, the underlying mechanisms of how plant functional diversity regulates nonlinear ecosystem response to climatic and anthropogenic stresses should be carefully explored in the future.
资助项目	Alexander von Humboldt Foundation ; Chinese Academy of Agricultural Sciences ; Second Tibetan Plateau Scientific Expedition and Research (STEP)[2019QZKK1002] ; German Research Foundation (DFG)[TI 824/3-1]
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
WOS记录号	WOS:000618047500003
资助机构	Alexander von Humboldt Foundation ; Chinese Academy of Agricultural Sciences ; Second Tibetan Plateau Scientific Expedition and Research (STEP) ; German Research Foundation (DFG)
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/160653]
专题	中国科学院地理科学与资源研究所
通讯作者	Wu, Jianshuang
作者单位	1.Univ Bayreuth, Dept Ecol Modelling, D-95448 Bayreuth, Germany 2.Oklahoma State Univ, Dept Geog, Stillwater, OK 74078 USA 3.Nantong Univ, Sch Geog Sci, Nantong 226007, Jiangsu, Peoples R China 4.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China 5.Free Univ Berlin, Inst Biol, Theoret Ecol, D-14195 Berlin, Germany 6.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Lhasa Natl Ecol Res Stn, Beijing 100101, Peoples R China 7.Univ Padua, Dept Land Environm Agr & Forestry, I-35020 Legnaro, PD, Italy 8.Alexandru Ioan Cuza Univ, Geog & Geol Fac, Dept Geog, Iasi 700505, Romania 9.Berlin Brandenburg Inst Adv Biodivers Res, D-14195 Berlin, Germany
推荐引用方式 GB/T 7714	Wu, Jianshuang,Li, Meng,Zhang, Xianzhou,et al. Disentangling climatic and anthropogenic contributions to nonlinear dynamics of alpine grassland productivity on the Qinghai-Tibetan Plateau[J]. JOURNAL OF ENVIRONMENTAL MANAGEMENT,2021,281:10.
APA	Wu, Jianshuang.,Li, Meng.,Zhang, Xianzhou.,Fiedler, Sebastian.,Gao, Qingzhu.,...&Tietjen, Britta.(2021).Disentangling climatic and anthropogenic contributions to nonlinear dynamics of alpine grassland productivity on the Qinghai-Tibetan Plateau.JOURNAL OF ENVIRONMENTAL MANAGEMENT,281,10.
MLA	Wu, Jianshuang,et al."Disentangling climatic and anthropogenic contributions to nonlinear dynamics of alpine grassland productivity on the Qinghai-Tibetan Plateau".JOURNAL OF ENVIRONMENTAL MANAGEMENT 281(2021):10.