快速城市化地区生态系统对土地利用变化的响应——以长株潭城市群为例

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

采用土地利用经济生态位模型、土地利用程度综合指数模型和生态服务价值评价方法，结合长株潭区域1996—2005年的土地利用更新调查数据，研究该区域生态系统对土地利用变化的响应。结果表明：（1）长株潭城市群非农用地对农用地的捕获力呈逐年增强的趋势，土地利用整体上朝利用强度增大、广度增加的方向发展，而区域生态系统服务价值量则呈现逐年下降的趋势；（2）长株潭城市群生态服务功能价值量分别与土地利用生态位差值和土地利用综合指数呈显著的负相关关系，其中与土地利用综合指数相关度最高；（3）在推进新型城市化过程中，控制非农用地的外延扩展，增加农地转用的生态补偿，减小土地利用的经济生态位差值能有效抑制农地的快速减少，促进区域“经济”与“生态”的协调发展。

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 con- servation 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.