Original Articles

Analysis of Vegetation Change in Mt. Qomolangma Natur al Reserver

  • 1. Institute of Geographical Sciences and Natural Resources Research, CAS, Beijing 100101|
    2. Graduate School of the Chinese Academy of Sciences, Beijing 100039|
    3. Institute of Tibetan Plateau Research, CAS, Beijing 100085|
    4. Laboratory for Climate Studies, CMA, Beijing 100081

Received date: 2006-04-01

  Revised date: 2006-05-01

  Online published: 2006-05-25


Based on the NOAA AVHRR - NDVI data from 1981 to 2001, digitalized China Vegetation Map (1∶1 000 000), temperature and precipitation data, DEM, and spatial people density data in 2000, the spatial patterns and characteristics along the altitude gradients of the vegetation change as well as their factors in Mt. Qomolangma Natural Reserver have been studied. The results show that: (a) there are notable spatial differences of vegetation change in Mt. Qomolangma Natural Reserver and stability is the most common status. 5.09 percent of the whole area is becoming serious degradation, 13.34 percent degraded, 54.31 percent keeping stable, 26.31 percent turning better and 0.95 percent notably turning better. The degradation and serious degradation areas mostly lie in the south of the Reserver, which are along the national boundaries. The areas of vegetation turning better lie in the north of the Reserver and the south side of the Yarlung Zangbo River. The stable areas lie between the better and worse areas. Along with the increase of elevation, the states of vegetation changes transit from degradation to stability. At the altitude from 2400m to 4000m vegetations are in degraded change condition while at the altitude from 4000m to 6000m vegetations are stable. (b) The degenerated objects in Mt. Qomolangma Natural Reserver are most composed of shrubs, needle- leaf forests and needle- leaf and broad- leaf mixed forests. Plant changes can be divided into three types: (1)Stable to growing better. They are steppes and meadows. (2)Stable to degraded. They are shrubs and alpine sparse vegetation. (3)Degraded. They are needle- leaf forests and needle- leaf and broadleaf mixed forests. (c) The temperature change affects vegetation change in space while the integration of temperature changes and slopes affects vegetation change along the altitude gradients. Spatial correlation coefficient of temperature change and NDVI change is 0.51. Correlation coefficients along the altitude gradients of temperature change and NDVI change and slope and NDVI change are 0.946 and - 0.896. (d) Unconscionable resource use mode made by human beings leads to the vegetation degeneration in some parts of Mt. Qomolangma Natural Reserver. Bio- resources are continually used to meet the need of economic development and human living, which are hard to regenerate in such a rigorous environment. Because of poverty and severe environment in Mt. Qomolangma Natural Reserver, sustainable development should be consistent with economic development. A series of adaptive policies and modes such as protecting bio- resources, altering industry structures and eliminating hunger and poverty should be taken to keep sustainable development.

Cite this article

ZHANG Wei,ZHANG Yili,WANG Zhaofeng,DING Mingjun,YANG Xuchao,LIN Xuedong,YAN Yuping . Analysis of Vegetation Change in Mt. Qomolangma Natur al Reserver[J]. PROGRESS IN GEOGRAPHY, 2006 , 25(3) : 12 -21 . DOI: 10.11820/dlkxjz.2006.03.002


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