伊通河流域土地利用变化及其生态响应

通过遥感影像解译获取伊通河流域1986、1996、2005和2017年土地利用数据,采用土地利用动态模型、土地利用度和生态系统服务价值等方法,研究伊通河流域土地利用变化特征及其生态响应。研究结果表明,耕地、城镇建筑用地和林地是伊通河流域主要的土地利用类型,1986—2017年间,研究区土地利用综合动态度降低,土地利用度上升,土地利用结构趋于稳定。在31年间,生态系统服务价值整体下降33.97%,林地、草地、湿地和水域面积的减小导致生态系统服务价值显著降低。

Land use change in Yitong River watershed and its ecological response

The land use data of Yitong River watershed in 1986,1996,2005 and 2017 were obtained by interpreting the remote sensing images.The land use dynamic model,land use degree and ecosystem service value were used to study the land use change of Yitong River watershed and its ecological response.The results show that cultivated land,urban construction land and forest land are the main types of land use in the Yitong River watershed.Between 1986 and 2017,the comprehensive dynamic degree of land use in the study area decreased,the land use degree increased,and the land use structure tended to be stable.In 31 years,the overall ecosystem service valve decreased by 33.97%.The reduction of forest land,grassland,wetland and water area led to a significant decrease in ecosystem service valve.