Spatial distribution and changes of ecological service value of land use in the southern suburb of Datong City

Based on established equivalent weight factor of ecosystem service value of China,ecological service value of land use in the southern suburb of Datong City was estimated.The spatial distribution and changes of ecological service value of land use were analyzed using land use classification data from Landsat TM/ETM+ images for 1987 and 2002 and spatially imitating land use ecological service value within rectangular units by Fragstat and ENVI soft. Results show that positive ecological service value land use area outweighs that of the negative for both 1987 and 2002. Ecological service value land use quality of the plains is higher than that of the massifs in 1987,while it is higher for the massifs in 2002. Decreasing ecological service value land area is larger than increasing ecological service value land area in the plains from 1987 to 2002, while the opposite trend is the case in massifs and the entire southern suburb research area.On the whole, decreasing ecological service value land area in the plains is larger than that of the massifs, while increasing ecological service value land area in the plains is smaller than that of the massifs.