大沽河流域土地利用与生态系统服务价值时空格局

Spatio-temporal Patterns for Land Use and EcosystemService Value of Dagu River Basin

以大沽河流域1980—2015年7期土地利用数据为基础,运用土地利用转移矩阵及土地利用动态度分析流域土地利用时空格局,结合敏感性指数与本地的生态系统服务价值系数,评估流域生态系统服务价值时空格局。结果表明:1980—2015年,流域耕地与林地面积净减少,建设用地与未利用土地面积净增加,耕地多转变为建设用地,且新增建设用地向胶州市和莱西市建成区聚集;流域生态系统服务以调节服务和支持服务为主;水域对流域生态系统服务价值的贡献最大;中游的生态系统服务价值最高,其次为下游;1980—2015年,生态系统服务价值净增长12.07亿元,呈现减少—增加—减少—增加的趋势;几种类型土地的敏感性指数范围为0.001~0.480。研究结果可为大沽河流域土地利用规划与生态补偿提供参考。

Based on land use data of the Dagu River Basin over 7 periods from 1980 to 2015,spatio-temporal patterns for land use of the basin were analyzed by land use transfer matrix and land use dynamic degree model.In combination of sensitivity coefficient and local value coefficient of ecosystem services,spatio-temporal patterns for ecosystem service value were also evaluated.The results showed that areas of cultivated land and forest land decreased in 1980—2015,while those of construction land and unused land increased.Cultivated land was mostly converted to construction land,and the newly added construction land was concentrated in the urban built-up areas of Jiaozhou City and Laixi City;basin ecosystem services mainly consisted of regulating and supporting services,and water bodies contributed the most to ecosystem service value in the basin.Ecosystem service value was the highest in the middle reaches,followed by the lower reaches,and it saw a net increase of 1.207 billion yuan in 1980—2015,showing a decreasing-increasing-decreasing-increasing trend;sensitivity coefficient of several types of land used ranged from 0.001 to 0.480.The results would provide a reference for land use planning and ecological compensation of the Dagu River Basin.