华阳河湖群地区土地利用变化对生态系统服务价值的影响

Study of ecosystem service values based on land use change in Huayang Lakes area

以华阳河湖群地区为研究对象,采用1990、2002、2010年3期的土地利用数据,运用Costanza方法,从生态系统服务功能的角度,结合中国生态服务价值当量因子表,分析了研究区土地利用变化及其对生态服务价值的影响.结果表明:1)1990—2010年间,耕地、湿地、水域和草地均减少,林地和建设用地大幅度增加,土地利用强度处于上升阶段;2)近20年来,研究区生态系统服务总价值从34.197亿元下降到31.17亿元,共下降了3.027亿元,下降趋势明显,主要是生态价值系数较高的湖泊面积减少所致,水域对研究区生态系统服务总价值贡献率最大;3)从单项生态系统服务功能看,研究区水源涵养、废物处理等服务性功能价值远大于其生产性功能价值,该区域在未来发展和规划中应更注重自然资源的保护,更多的保护水域、林地等高生态价值的生态用地,以实现人口、资源与环境的可持续发展.

It is of significance to study the effect of changes in land use on ecosystem service values. Costanza＇ s method and coefficients proposed by Gao-di Xie were applied to land use data from 1990, 2002, 2010 to examine the effects of changes in land use on ecosystem service value from the perspective of ecosystem services in Huayang Lakes area. It was found that the area of forest land and construction land increased, but the area of cultivated land, wetland, water area and grass land decreased from 1990 to 2010. This indicated that land use in Huayang Lakes area was in the ascending stage in this period. ESV decreased from 3.42 billion Yuan （RMB） in 1990 to 3. 117 billion Yuan （RMB） in 2010 （-0. 303 billion Yuan）. ESV of water accounted for the largest part （69.03%） of total ESV in Huayang Lakes area. The service function of water conservation, waste disposal is larger than the production function. For sustainable developments of the human population, resources and environment in Huayang Lakes area, more attention should be paid to natural resources protection in future urban planning, especially for waters and woodland, ecological lands of high ecological value.