RESEARCH ON RESPONSE OF ECOSYSTEM TO CHANGES IN LAND USE IN RAPID URBANIZATION ARESA——A CASE STUDY OF CHANGSHA-ZHUZHOU-XIANGTAN

I and use change and ecosystem services value change were studied based on the data of land use survey from 1996 to 2005 in Changsha-Zhuzhou-Xiangtan megalopolis.Economic niche,integrated index of land use degree and ecosystem services value were employed.The results show(1)Driving forces of cultivated land conservation in Changsha-Zhuzhou-Xiangtan megalopolis increased yearly,land use developed as a whole toward high intensity and extent,but the value of ecosystem services decreased.(2)The ecosystem services value in Changsha-Zhuzhou-Xiangtan megalopolis was negatively correlated with economic niche and integrated index of land degree.(3)In the course of urbanization,controlling the extension of construction land,improving the ecological compensation of cultivated land conservation.and reducing economic niche of land use could availably restrain decrease of cultivated land,and advance the growth of'economy'and'ecology'harmoniously.