干旱区生态环境知识资源中心

Using the landscape pattern remote sensing data of Maowusu Sandy Land in 2010, we constructed the regional landscape ecological risk index of study area by using Landscape damage index, landscape fragile index, landscape structure index, landscape fragmentation index, landscape apartness index and landscape dominance index. And the risk index is used for assessment of ecological risk in Maowusu Sandy Land. Then, we revealed the connection between the landscape pattern and the regional ecological risk in desertification area. (1)The result showed that the landscape damage index in descending order are bare land, residential and industrial land, low coverage grassland, cultivated land, medium coverage grassland, water area, high coverage grassland and forest area. (2) High ecological risk areas are mainly located in the middle and southeast region in Maowusu Sandy Land, few are scattered in other areas; relatively high ecological risk areas are mainly located in the southeast of the Maowusu Sandy land, distributed linearly extending to the northwest; relatively low risk areas are mainly distributed in the southeast and the northwest, there are scattered in the northeast; low risk areas are the most widely distributed area, which concentrated in the northern region, there are more in the south with dispersed distribution. (3) Bare land mainly distributed in the area of high ecological risk; medium coverage grassland and cultivated land are concentrated in the area of relatively high ecological risk; high coverage grassland is located in the areas of medium ecological risk; and the more part of forest area is distributed in the areas of low or relatively low ecological risk.