Change in the Spatial Structure of Grassland Vegetation in the Xilin River Basin from 1985 to 1999
Change in the Spatial Structure of Grassland Vegetation in the Xilin River Basin from 1985 to 1999
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发表时间：
2001
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通讯作者：
Yongfu Wei
中科院分区：
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作者：
Yongfu Wei
利用1985年和1999年的Landsat TM影像，通过野外调查，对锡林河流域1985 - 1999年草地植被类型和分布的变化进行了监测和分析。由于过度放牧和开垦，草地植物群落面积发生了变化。与1985年相比，羊草、大针茅中荒漠草原和大针茅、羊草荒漠草原面积分别减少了20.2%和28.4%，冷蒿草原面积增加了46.6%。近20年来，草原面积增长34.8%。总体上，新林河流域草地植被处于退化状态，并有退化趋势。
Using Landsat TM images of 1985 and 1999, and through field investigation, the monitoring and analysis on the change of grassland vegetation types and distribution in the Xilin River Basin from 1985 to 1999 were made.Due to overgrazing and cultivating,the area of grassland plant community has changed. Comparing with 1985, the area of Leymus chinensis,Stipa grandis meso xero forbs steppe and Stipa grandis, Leymus chinensis xero forbs steppe decreased by 20.2% and 28.4%, and the area of Artemisia frigida steppe increased by 46.6%. In the past two decades, the area of grassland cultivated increased by 34.8%. In whole, the grassland vegetation in the Xinlin River Basin is in a state and trend of degradation.