基于土地利用变化的宝鸡市生态系统服务价值研究

Study on Ecosystem Service Value of Baoji City Based on Land Use Change

本文基于宝鸡市2005-2015年土地利用变化统计数据,分析并研究了土地利用变化情况和生态系统服务价值变化特征,为宝鸡市土地利用科学布局及合理规划提供了参考。结果表明:(1)研究期内,宝鸡市土地利用结构发生了明显变化,林地和其他农用地面积出现增加,未利用地、草地、水域、园地、建设用地、耕地均有不同程度的减少,未利用地面积减少最多,减幅高达55.45%,林地面积增加最多,增幅为17.67%。(2)近10年,宝鸡市生态系统服务总价值由327.45亿元增加到363.01亿元,增加了35.56亿元,林地的贡献度最大,耕地次之。(3)宝鸡市突出的生态系统服务功能是土壤形成与保护、水源涵养、生物多样性保护、气体调节,该4项生态系统服务价值超过了宝鸡市生态系统服务总价值的60%。(4)各时期不同土地利用类型的生态服务价值敏感性指数均小于1,表明研究结果可信。

In this paper,based on the statistical data of land use change in Baoji City from 2005 to 2015,the changes of land use and ecosystem service value were analyzed and studied,which provided a reference for the scientific layout and rational planning of land use in Baoji City.The results show that:(1)During the study period,the land use structure of Baoji City has changed significantly,the area of woodland and other agricultural land has increased,the unused land,grassland,water area,garden land,construction land and cultivated land have decreased in varying degrees,and the unused land area has decreased the most,with a reduction of up to 55.45%,and the area of forest land has increased.The largest increase was 17.67%.(2)In the past 10 years,the total value of ecosystem services in Baoji City has increased from 32.745 billion yuan to 36.301 billion yuan,an increase of 3.556 billion yuan,with forest land contributing the most,followed by arable land.(3)The prominent ecosystem services in Baoji City are soil formation and protection,water conservation,biodiversity conservation and gas regulation.The value of these four ecosystem services exceeds 60%of the total value of ecosystem services in Baoji City.(4)The sensitivity index of ecosystem service value of different land use types in each period is less than 1,which indicates that the research results are credible.