地理科学进展 ›› 2010, Vol. 29 ›› Issue (11): 1427-1432.doi: 10.11820/dlkxjz.2010.11.040

• 自然区划与土地利用 • 上一篇    下一篇

珠穆朗玛峰国家自然保护区南北坡植被覆盖变化

马飞1, 李景吉1, 彭培好1, 高志勇2, 阚瑷珂3   

  1. 1. 成都理工大学地球科学学院, 成都610059;
    2. 西藏自治区科技信息研究所, 拉萨850001;
    3. 成都理工大学地球探测与信息技术教育部重点实验室, 成都610059
  • 收稿日期:2010-01-01 修回日期:2010-07-01 出版日期:2010-11-25 发布日期:2010-11-25
  • 通讯作者: 马飞(1986-),陕西扶风县人,硕士研究生,研究方向为流域生态评估和水土保持 E-mail:mafei0701@163.com; peihaop@163.com
  • 作者简介:马飞(1986-)|陕西扶风县人|硕士研究生|研究方向为流域生态评估和水土保持
  • 基金资助:

    国际科技合作项目(2008DFA11020)

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

摘要:

利用2000—2009 年MODIS NDVI数据,基于每个像元的生长季NDVI峰值进行了像元水平的线性趋势分析,研究珠穆朗玛峰自然保护区南坡和北坡的植被覆盖的空间分布和变化特征。结果表明:①保护区内植被覆盖显著改善区域和轻微改善区域NDVI-Max的年平均增加率分别为3.06%和1.25%;显著退化区域和轻微退化区域NDVI-Max的年平均减少率分别为2.82%和1.09%。②2000—2009 年,保护区南坡的植被覆盖整体上呈现上升趋势,22.59%的区域显著改善,19.05%的区域轻微改善,24.75%的区域保持稳定;北坡的植被覆盖整体上呈现下降趋势,19.5%的区域严重退化,24.43%的区域轻微退化,38.12%的区域保持稳定。③南坡有植被覆盖的8 种土地利用类型中,山区旱地植被覆盖呈现退化趋势,其余土地利用类型都呈现上升趋势;北坡有植被覆盖的10 种土地利用类型中,植被覆盖都呈现退化趋势。

关键词: NDVI, 植被覆盖变化, 珠穆朗玛峰自然保护区

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