Contributions of climatic and non-climatic drivers to grassland variations on the Tibetan Plateau

doi:10.1016/j.ecoleng.2017.07.039

	Contributions of climatic and non-climatic drivers to grassland variations on the Tibetan Plateau
	Pan, Tao 1; Zou, Xintong 1,2; Liu, Yujie 1; Wu, Shaohong 1; He, Guangming 3
刊名	ECOLOGICAL ENGINEERING
	2017-11-01
卷号	108 页码:307-317
关键词	Non-climatic and climatic drivers Contribution Grassland variations NDVI Ecological programs Tibetan Plateau (TP)
ISSN号	0925-8574
DOI	10.1016/j.ecoleng.2017.07.039
通讯作者	Liu, Yujie(liuyujie@igsnrr.ac.cn)
英文摘要	Grasslands cover a large portion of the global land surface, providing crucial ecosystem services for humans. During the past decades, grasslands of the Tibetan Plateau (TP), which is the highest plateau over the world, have experienced dramatic changes, especially degradation caused by intensifying climatic (e.g., warming, drying) and non-climatic (e.g., land use changes) drivers. However, it remains unclear how quantitatively different drivers contribute to grassland changes, which is critical for various stakeholders to make informative decisions to mitigate these changes. Here, we proposed a two-step methodology to tackle this challenge. First, the effects of land use changes on grassland distribution were investigated. Then the contributions of climatic and non-climatic drivers were discriminated through the differences between observed Normalized Difference Vegetation Index (NDVI) and simulated NDVI based on General Linear Models (GLM). Results show that the area of grasslands decreased from 1980 to 2010 due to land use changes. The area converted from grasslands to other land covers was larger than that converted from other land covers to grasslands. Grassland NDVI without land use changes did not increase significantly. Climatic drivers such as warming and wetting were beneficial to grassland quality, but continuous drying probably induced grassland degradation. Non-climatic drivers such as ecological programs improved grassland quality, while overgrazing might result in grassland degradation. Our findings indicate the impacts of non-climatic drivers on grassland variations were more intense than that of the climatic drivers in the past three decades. The relative contribution rate of non-climatic drivers (66.07%) doubled that of climatic drivers (33.93%) to grassland variations. The impacts of climatic drivers were relatively slow but persistent. Non-climatic drivers like ecological programs could effectively mitigate grassland degradation induced by land use changes or continuous drying on the TP. This study could provide scientific support for grassland restoration and management on the TP.
资助项目	National Natural Science Foundation of China[41671107] ; National Natural Science Foundation of China[41301092] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2016049]
WOS关键词	LAND-COVER CHANGE ; NDVI TIME-SERIES ; VEGETATION DYNAMICS ; ALPINE MEADOW ; ANTHROPOGENIC ACTIVITIES ; RANGELAND DEGRADATION ; RESTORATION PROJECTS ; DRIVING FORCES ; ORGANIC-CARBON ; TREND ANALYSIS
WOS研究方向	Environmental Sciences & Ecology ; Engineering
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000412127500035
资助机构	National Natural Science Foundation of China ; Youth Innovation Promotion Association of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/62113]
专题	中国科学院地理科学与资源研究所
通讯作者	Liu, Yujie
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Michigan State Univ, MSU Innovat Ctr, E Lansing, MI 48823 USA
推荐引用方式 GB/T 7714	Pan, Tao,Zou, Xintong,Liu, Yujie,et al. Contributions of climatic and non-climatic drivers to grassland variations on the Tibetan Plateau[J]. ECOLOGICAL ENGINEERING,2017,108:307-317.
APA	Pan, Tao,Zou, Xintong,Liu, Yujie,Wu, Shaohong,&He, Guangming.(2017).Contributions of climatic and non-climatic drivers to grassland variations on the Tibetan Plateau.ECOLOGICAL ENGINEERING,108,307-317.
MLA	Pan, Tao,et al."Contributions of climatic and non-climatic drivers to grassland variations on the Tibetan Plateau".ECOLOGICAL ENGINEERING 108(2017):307-317.