吉林省近20年景观空间格局动态变化研究

利用1980、1995、2000年三期遥感影像,在GIS与RS技术支持下,解译提取了吉林省20 a景观类型空间信息,选取景观多样性、破碎化、分维数等景观指数分析吉林省景观格局的时空动态演变。

Research on Dynamic Change of Landscape Pattern of Jilin Province from 1980 to 2000

By using three-period(1980,1995,2000) remote sensing images and with the support of GIS and RS,spatial information of landscape elements of Jilin Province in the past twenty years is interpreted and extracted,and on the basis of the models of landscape index such as diversity,fragmentation,and mean patch fractal dimension,etc.,dynamic spatio-temporal change of landscape patterns of Jilin Province is analyzed.The results show:(① Cropland) and forestland are main landscape types,and forestland becomes landscape matrix;② In the study area,landscape is unevenly distributed,and there are low heterogeneity,simple ecosystem structure and a tendency of irrational landscape patterns.Spatial shapes of patches are simple,self-similarity is strong,and according to dynamic change analysis,patch shape tends to be more simple;③ From 1980 to 2000,holistic landscape fragmentation is low and its change is slight.As far as landscape elements are concerned,the fragmentation of grassland,water,residential area and construction land is relatively low,residential area and construction land are dispersedly distributed,cropland and forestland are most concentrative,furthermore,the trend will continue.