重庆市武陵山区土地利用转型的生态系统服务价值效应

Effects of Land Use Transition on Ecosystem Service Values in Wuling Mountain Region in Chongqing City

[目的]分析重庆市武隆区土地利用转型的生态系统服务价值(ESV)效应,为武陵山区土地合理利用,资源优化配置,实现保护中开发和生态服务价值最大化提供决策依据。[方法]以武隆区2010,2015,2020年3期的土地利用数据为数据源,测算武隆区生态服务价值效应,运用土地利用转移矩阵、变化贡献率模型及交叉敏感性系数,分析武隆区土地利用转型对生态系统服务价值损益的时空演变。[结果](1)2020年武隆区ESV空间上呈现高值区集中分布在武隆区中部的仙女山街道和白马镇,低值区集中分布在武隆区东西两侧和中部的土坎镇;(2)2010—2020年武隆区ESV总量呈增加趋势;(3)2010—2020年武隆区各用地类型ESV变化和变化贡献率排序一致,即:林地>水域>耕地>草地>荒漠;(4)草地转换为林地的敏感性系数最高,其他土地利用类型转换为草地时都缺乏敏感性。[结论]林地和水域面积的增加可大幅提高ESV总量,建议农业结构调整时,增加园地和林地面积,严格控制耕地撂荒。

[Objective] The effects of land use transition on ecosystem service values(ESV) in the Wulong District were analyzed in order to provide a basis for decision-making regarding rational land use,optimal allocation of resources,development and protection,and maximization of ESV in the Wuling Mountain region.[Methods] Based on land use data for the Wulong District in 2010,2015,and 2020,the effects of land use transition on ecosystem service values in the Wulong District were calculated.The spatial-temporal changes of land use transition on ecosystem service values were analyzed by using a land use transfer matrix,a change contribution rate model,and a cross-sensitivity coefficient.[Results](1) In 2020,high values of ESV in the Wulong District were concentrated in Xiannvshan Street and Baima Town in the middle of the Wulong District,while the low-value areas were concentrated on the east and west sides of the Wulong District and Tukan Town in the middle.(2) From 2010 to 2020,the ESV in the Wulong District showed an increasing trend;(3) From 2010 to 2020,ESV change and variation contribution rate of different land use types in the Wulong District consistently followed the order of forest>water>cropland>grassland>desert.(4) The sensitivity coefficient of converting grassland to forest land was the highest,while other land use types were not sensitive to the conversion to grassland.[Conclusion] The increase of forest land and water area can greatly increase the total ESV.We suggest increasing the area of garden land and forest land,and strictly controlling the abandonment of cultivated land during the time when adjustments are made to agricultural practices and structure.