干旱区生态环境知识资源中心(Arid): Effects of climatic and grazing changes on desertification of alpine grasslands, Northern Tibet

Arid

DOI	10.1016/j.ecolind.2019.105647
	Effects of climatic and grazing changes on desertification of alpine grasslands, Northern Tibet
	Sun, Jian 1,2,3; Hou, Ge 1; Liu, Miao 1; Fu, Gang 1; Zhan, TianYu 4; Zhou, Huakun 5; Tsunekawa, Atsushi 6; Haregeweyn, Nigussie 7
通讯作者	Sun, Jian
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2019
卷号	107
英文摘要	Alpine grasslands influence global climatic change and local economy in Northern Tibet. There is some debate about whether the grassland desertification is related to climate or grazing. Here, we employed vegetation coverage normalized difference vegetation index (NDVI) and landscape indexes to investigate the grassland desertification conditions and its impacts. We also linked these indexes to changes in climate and grazing to explore the major drivers. Our results demonstrated that the grassland conditions were improved, and the desertification area (35.28.104 km(2)) was smaller than the restoration area (38.77.104 km(2)) from 2001 to 2015 across Northern Tibet through the statistical analysis of different desertified gradient areas. A decrease in landscape indexes (e.g., patch density (PD) and splitting index (SPLIT)) and increases in largest patch index (LPI) and contagion index (CONTAG) were observed across Northern Tibet. The aridity index and grazing significantly influenced the landscape pattern of the whole alpine grassland. In general, changes in climate factors had the positive effects on the vegetation coverage of alpine grassland, but mean annual temperature had insignificant influence in alpine meadow and desert steppe (P > 0.05). In addition, mean annual precipitation had the most significant effect in the desert steppe (93.28%), followed by alpine steppe (79.31%) and alpine meadow (38.25%). Therefore, our results highlighted that the conditions of the alpine grassland were improved and more stable, and landscape fragmentations were mainly influenced by the aridity index and grazing.
英文关键词	Normalized difference vegetation index (NDVI) Landscape index Climate change Grazing Desertification Alpine grassland
类型	Article
语种	英语
国家	Peoples R China ; USA ; Japan
收录类别	SCI-E
WOS记录号	WOS:000490757500093
WOS关键词	DESERT STEPPE ; SPATIOTEMPORAL DYNAMICS ; AEOLIAN DESERTIFICATION ; ARIDITY INDEX ; VEGETATION ; ECOSYSTEM ; PLATEAU ; DEGRADATION ; NITROGEN ; CHINA
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
EI主题词	2019-12-01
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311426
作者单位	1.Chinese Acad Sci, Synth Res Ctr Chinese Ecosyst Res Network, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Beijing 100101, Peoples R China; 2.Chinese Acad Sci, Res Ctr Eco Environm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China; 3.Rutgers State Univ, Sch Environm & Biol Sci, Dept Ecol Evolut & Nat Resources, New Brunswick, NJ 08901 USA; 4.Chengdu Univ Technol, Coll Tourism & Urban Rural Planning, Chengdu 610059, Sichuan, Peoples R China; 5.Chinese Acad Sci, Northwest Inst Plateau Biol, Qinghai Prov Key Lab Restorat Ecol Cold Area, Xining, Qinghai, Peoples R China; 6.Tottori Univ, Arid Land Res Ctr, Tottori 6800001, Japan; 7.Tottori Univ, Int Platform Dryland Res & Educ, Tottori 6800001, Japan
推荐引用方式 GB/T 7714	Sun, Jian,Hou, Ge,Liu, Miao,et al. Effects of climatic and grazing changes on desertification of alpine grasslands, Northern Tibet[J]. 中国科学院地理科学与资源研究所,2019,107.
APA	Sun, Jian.,Hou, Ge.,Liu, Miao.,Fu, Gang.,Zhan, TianYu.,...&Haregeweyn, Nigussie.(2019).Effects of climatic and grazing changes on desertification of alpine grasslands, Northern Tibet.ECOLOGICAL INDICATORS,107.
MLA	Sun, Jian,et al."Effects of climatic and grazing changes on desertification of alpine grasslands, Northern Tibet".ECOLOGICAL INDICATORS 107(2019).