大同市南郊区土地利用生态服务价值空间分布及变化

本研究以中国生态服务价值当量因子表为基础计算了大同市南郊区不同土地利用生态服务价值单价,结合该区1987年和2002年Landsat TM/ETM 影像分类数据,借助Fragstats和ENVI软件支持进行了矩形单元土地利用生态服务价值的空间模拟,然后采用ENVI的波段运算功能、分类功能进行大同市南郊区土地利用生态服务价值空间分布及变化研究。结果显示:大同市南郊区1987年和2002年土地利用正生态服务区面积大于负生态服务区面积,但生态服务质量等级都不高。1987年平原区生态服务质量好于山丘区,2002年山丘区生态服务质量好于平原区。大同市南郊区从1987年至2002年土地利用生态服务增加区面积大于减小区,且以轻度增加为主。平原区生态服务增加区面积小于山丘区,生态服务减小区面积大于山丘区。平原区生态服务增加区面积小于减小区面积;山丘区生态服务增加区面积大于减小区面积。

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.