宿迁市生态系统服务价值动态研究

Research about Dynamic Changes of Ecosystem Service Value in Suqian City

利用2000和2004年TM与SPOT复合影像,得出宿迁市土地利用/覆被数据,再结合中国不同陆地生态系统单位面积生态服务价值表,分析了宿迁市生态系统服务价值及动态变化,结果表明:宿迁市生态系统服务价值由2000年的800.57×108元减少到2004年的732.27×108元,变化幅度为-8.53%;耕地和水域面积的减少是该区生态系统服务功能丧失的最主要原因;研究区水域生态系统单位面积生态服务价值量最大。该区生态系统服务价值动态变化凸显出研究区土地利用结构的不合理性,应加大研究区农田和水域面积的比重,严格控制耕地向建设用地的转化。

Based on the SPOT and TM compound images of Suqian City in 2000 and 2004, data of land utilization were obtained. And by using ecosystem service value per unit area of different terrestrial types in China, the dynamic changes of ecosystem service value in Suqian City were analyzed. The result shoq;ed that total ecosystem service value of Suqian City was decreased from 800.57×10^8 yuan in 2000 to 732.27×10^8 yuan in 2004, with a change rate of - 8.53%. The decrease in the area of water and farmland was the primary cause of the loss in ecosystem service function. Aquatic ecosystem had the highest ecosystem service value per unit area. The dynamic changes of ecosystem service value revealed the conspicuously irrationality of land use structure in this region. The area proportions of farmland and waters should be increased, and the conversion from farmland to constructive land should be controlled strictly.