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干旱区科学
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Spatial distribution of vegetation and the influencing factors in Qaidam Basin based on NDVI
WenBin ZHU, AiFeng LV, ShaoFeng JIA
1 Institute of Geographical Sciences and Natural Resources Research, CAS, Beijing 100101, China; 2 Graduate University of Chinese Academy of Sciences, Beijing 100039, China
Spatial distribution of vegetation and the influencing factors in Qaidam Basin based on NDVI
WenBin ZHU, AiFeng LV, ShaoFeng JIA
1 Institute of Geographical Sciences and Natural Resources Research, CAS, Beijing 100101, China; 2 Graduate University of Chinese Academy of Sciences, Beijing 100039, China
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摘要 The spatial distribution of vegetation in Qaidam Basin was analyzed using GIMMS (Global Inventory Modeling and Mapping Studies) / NDVI (Normalized Difference Vegetation Index) data set from January 1982 to December 2006. Based on the data of precipitation, terrain, stream systems, land use and the map of vegetation distribution in Qaidam Basin, we studied the factors influencing the spatial distribution of vegetation. The results showed that the vegetation was generally low in Qaidam Basin and there was a clear semi-ring structure from southeast to northwest. In some areas, the existence of rivers, lakes and spring belts turned this semi-ring structure into a non-continuous state and formed distinct bright spots and continuous linear features. There were four main factors that affected the spatial distribution of vegetation coverage in Qaidam Basin, i.e., precipitation, hydrological conditions, altitude and human activities. Precipitation and altitude have a correlation and determine the basic pattern of vegetation distribution in Qaidam Basin. The impacts of hydrological conditions and human activities were mainly embodied in partial areas, and often broke the pattern of vegetation distribution dominated by precipitation and altitude.
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WenBin ZHU
AiFeng LV
ShaoFeng JIA
关键词:  groundwater depth  community characteristic  niche breadth  oases  Taklamakan desert    
Abstract: The spatial distribution of vegetation in Qaidam Basin was analyzed using GIMMS (Global Inventory Modeling and Mapping Studies) / NDVI (Normalized Difference Vegetation Index) data set from January 1982 to December 2006. Based on the data of precipitation, terrain, stream systems, land use and the map of vegetation distribution in Qaidam Basin, we studied the factors influencing the spatial distribution of vegetation. The results showed that the vegetation was generally low in Qaidam Basin and there was a clear semi-ring structure from southeast to northwest. In some areas, the existence of rivers, lakes and spring belts turned this semi-ring structure into a non-continuous state and formed distinct bright spots and continuous linear features. There were four main factors that affected the spatial distribution of vegetation coverage in Qaidam Basin, i.e., precipitation, hydrological conditions, altitude and human activities. Precipitation and altitude have a correlation and determine the basic pattern of vegetation distribution in Qaidam Basin. The impacts of hydrological conditions and human activities were mainly embodied in partial areas, and often broke the pattern of vegetation distribution dominated by precipitation and altitude.
Key words:  groundwater depth    community characteristic    niche breadth    oases    Taklamakan desert
收稿日期:  2010-11-08      修回日期:  2010-12-29           出版日期:  2011-06-07      发布日期:  2011-06-07      期的出版日期:  2011-06-07
基金资助: National Natural Sciences Foundation of China (90302009, 40801216); Ministry of Water Resources' Special Funds for Scientific Research on Public Causes (201001062)
通讯作者:  ShaoFeng JIA    E-mail:  jiasf@igsnrr.ac.cn
引用本文:    
WenBin ZHU, AiFeng LV, ShaoFeng JIA. Spatial distribution of vegetation and the influencing factors in Qaidam Basin based on NDVI[J]. 干旱区科学, 10.3724/SP.J.1227.2011.00085.
WenBin ZHU, AiFeng LV, ShaoFeng JIA. Spatial distribution of vegetation and the influencing factors in Qaidam Basin based on NDVI. Journal of Arid Land, 2011, 3(2): 85-93.
链接本文:  
http://jal.xjegi.com/CN/10.3724/SP.J.1227.2011.00085  或          http://jal.xjegi.com/CN/Y2011/V3/I2/85
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