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The ecological implications of land use change in the Source Regions of the Yangtze and Yellow Rivers, China
Li Na1,2; Wang Genxu2; Liu Guangsheng2; Lin Yun2; Sun Xiangyang2
Corresponding AuthorLi Na
2013-10-01
Source PublicationREGIONAL ENVIRONMENTAL CHANGE
ISSN1436-3798
Volume13Issue:5Pages:1099-1108
SubtypeArticle
AbstractThe alpine ecosystems in permafrost regions are extremely sensitive to climate change. The headwater regions of Yangtze River and Yellow River of the Qinghai-Tibet Plateau are on the permafrost area. Aerial photos of the Source Regions of the Yangtze and Yellow River taken in 1968 and three phases of TM images acquired from 1986, 2000, and 2008 were used to analyze the spatial alterations of the land cover and corresponding effects on the environment guided by landscape ecology theory. Firstly, land cover types were divided into three classes and 11 subclasses. Analysis results revealed the trends and magnitude of the eco-environmental changes in the regions over the past four decades and showed a continuous degradation of grasslands and the extension of desertification and salinization. Secondly, five landscape pattern indices (i.e., NP, MPS, PR, SHEI, CONTAG) commonly used in landscape ecological studies were calculated, and results showed that this region had become more centralized and diversified. Finally, the factors causing the degradation of alpine grasslands were analyzed. The regional climate exhibited a tendency toward significant warming and desiccation with the air temperature increased by 0.03 A degrees C per year and relative stable precipitation over the last 40 years. And the temperature of permafrost in 0-20 cm soil layer obviously raised by 0.2-0.3 A degrees C in the last 40 years. The combined effects of climate warming and permafrost variation were the major drivers for the changes of landscape in alpine ecosystems.
KeywordLand Cover Temporal And Spatial Patterns Grassland Degradation Source Regions Of The Yangtze And Yellow Rivers Qinghai-tibetan Plateau
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1007/s10113-013-0419-5
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI ; SSCI
WOS KeywordLANDSCAPE PATTERNS ; INDEXES
Language英语
WOS SubjectEnvironmental Sciences ; Environmental Studies
WOS IDWOS:000324823700015
Funding OrganizationNational Science Fund for Distinguished Young Scholars(40925002) ; Open Research Fund of Key Laboratory of Mollisols Agroecology, Chinese Academy of Sciences(2011ZKHT-02)
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/6553
Collection山地表生过程与生态调控重点实验室
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Environm Evolvement & Regulat, Chengdu 610041, Peoples R China
2.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Key Lab Mollisols Agroecol, Harbin 150081, Peoples R China
Recommended Citation
GB/T 7714
Li Na,Wang Genxu,Liu Guangsheng,et al. The ecological implications of land use change in the Source Regions of the Yangtze and Yellow Rivers, China[J]. REGIONAL ENVIRONMENTAL CHANGE,2013,13(5):1099-1108.
APA Li Na,Wang Genxu,Liu Guangsheng,Lin Yun,&Sun Xiangyang.(2013).The ecological implications of land use change in the Source Regions of the Yangtze and Yellow Rivers, China.REGIONAL ENVIRONMENTAL CHANGE,13(5),1099-1108.
MLA Li Na,et al."The ecological implications of land use change in the Source Regions of the Yangtze and Yellow Rivers, China".REGIONAL ENVIRONMENTAL CHANGE 13.5(2013):1099-1108.
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