The Landscape Patch Characteristics of Tibetan Plateau in Recent 10 Years

Based on the land cover data of 2000 and NDVI data from1999 to 2007,the landscape pattern in Tibetan Plateau is calculated by using ERDAS and GIS software,the plateau region of the landscape pattern and distribution are calculated by using landscape pattern analysis software FRAGSTATS3.3.The results indicated: the number of patches of forests and grassland were reduced;patch area of forests was increased,while the grassland area was decreased.The number of patches and patch area of snow were reduced,the patch area of desert landscape was reduced,but the number of desert patches was increased.the study area was dominated by grassland landscape,and the forests landscape were higher landscape connectivity and distribution than desert,snow and water,Shannon's Diversity Index had a gradual increasing trend,it showed that the regional landscape type or landscape type increased.The patch characteristics of landscape in plateau showed the ecological environment of plateau in last 10 years has a good trend.