RESPONSES OF WETLAND ECO-SECURITY TO LAND USE CHANGE IN WESTERN JILIN PROVINCE, CHINA

By the use of the software of ARCGIS, dynamic changes of the landscape elements, landscape structure,conversion processes of the landscape gradients and the responses of wetland eeo-security to land use/cover changes (LUCC) in the western Jilin Province were studied from 1930 to 2000. The results show that the landscape elements of grassland, wetland, forestland and water area shrank rapidly, and wetlands underwent huge losses in the study period due to the conversion from wetland into arable land and grassland in large quantities. The responses of wetland eco-security to LUCC were inverse evolvement of wetland vegetation, loss of biodiversity, water deficiency in wetland ecosystem, the changes of the heterogeneity of wetlands and the fragmentation of the wetland habitats. Suggestions were given for protection of wetlands and the regional sustainable development.