The Spatial and Temoral Changes of Landscape Ecology in Xilingol League in the Past 35 Years

In this work,the spatial data sets were obtained by the support of ArcGIS platform from the remote sensing images and other related data.On that basis the spatial and temporal distribution change of ecological landscape types in Xilingol League was analyzed since the mid and late age of 1970s.The results showed that the major changes of ecological landscape in Xilingol League were occurred in the grassland,hungriness,wetland and farmland,the characters of temporal changes were that from year 1975 to 2000,the desert landscape and the farmland landscape were increased,the grassland landscape was decreased,it was considered that a damaging stage to landscape ecology in Xilingol League;from 2000 to 2009,the farmland landscape was decreasing and grassland landscape was increasing,it was the resuming stage.The 2000 was the year of watershed of making better of landscape ecology in Xilingol League,In changing extent,the absolute area of the grassland's change was the largest,reduced net area was 1747.83km2,but the changing speed of the grassland was the smallest,just 0.01%.The settlement landscape type had the most fast speed,average annual increasing 0.84%.On the spatial distribution,the changing area was diffusing from central and southern regions and gradually spreads out.At the same time,the degree of changes was increasing gradually and from year 2005 to 2009 the change of the area was move to the counties in the marginal areas of the study area.The degree of the changes was reducing.