地理科学进展

PROGRESS IN GEOGRAPHY ›› 2010, Vol. 29 ›› Issue (11): 1427-1432.doi: 10.11820/dlkxjz.2010.11.040

• Original Articles • Previous Articles     Next Articles

Vegetation Changes on Southern and Northern Slopes of the Mt. Qomolangma National Nature Reserve

MAFei1, LI Jingji1, PENG Peihao1, GAO Zhiyong2, KAN Aike3   

  1. 1. College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China;
    2. Science and Technology Information Research Institute of Tibet, Lhasa 850001, China;
    3. Key Lab of Earth Exploration and Information Techniques of Ministry of Education,Chengdu University of Technology, Chengdu 610059, China
  • Received:2010-01-01 Revised:2010-07-01 Online:2010-11-25 Published:2010-11-25

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Abstract:

The Qomolangma National Nature Reserve was established on March 18, 1989. In March 2005, it was added to the global biosphere protected area network. There are relatively few domestic studies on its vegetation cover change. In this paper, using MODIS NDVI data from 2000 to 2009, the spatial distribution and variation of vegetation cover on the southern and northern slopes in the Mt. Qomolangma Nature Reserve were studied based on the linear trend analysis of the growing season NDVI peak value of each pixel by pixel level. The results showed that: (1) For significantly improved area and slightly improved area of vegetation cover, the average annual growth rates of NDVI-Max are 3.06% and 1.25% respectively; For significantly degraded area and slightly degraded area of vegetation cover, the average annual reduction rates of NDVI-Max are 2.82% and 1.09% respectively. (2) The vegetation cover on the southern slope of the reserve showed an increasing trend on the whole from 2000 to 2009, and 22.59% of the study area improved greatly, 19.05% improved lightly, and 24.75% kept stable; while on the northern slope, the vegetation cover showed a decreasing trend on the whole, and 19.5% of the study area degenerated greatly, 24.43% degenerated lightly, and 38.12% kept stable; (3) Among the eight landuse types covered with vegetation on the southern slope, the vegetation cover of dry farmland in mountainous area showed a decreasing trend, and that of the others showed an increasing trend; while for the 10 landuse types covered with vegetation on the northern slope, their vegetation cover showed a decreasing trend.

Key words: the Mt. Qomolangma nature reserve, vegetation cover change, vegetation index NDVI