绵阳市土地利用类型与生态系统服务价值时空变化研究

Research on the Spatio-temporal Changes of Land-use Type and Ecosystem Service Value in Mianyang City

基于土地利用类型的生态系统服务价值评估是缓解城镇化带来负面生态环境问题的有效途径之一,本研究采用单位土地利用类型面积生态系统服务价值赋值法结合土地利用程度综合指数分析,分别在行政单元与格网尺度下评估绵阳市长时间序列土地利用类型和生态系统服务价值变化趋势。结果表明:①研究区域土地利用程度综合指数除平武县、三台县、盐亭县以外,其余区县普遍增加。②该区域生态系统服务价值受土地利用类型分布影响显著呈递减趋势,这与建设用地面积增加有关。③草地、水域、建设用地和耕地生态系统服务价值与总生态系统服务价值分别呈正、负相关。综上,该结果可为区域基于生态系统服务的土地利用管理与规划提供理论依据与方法借鉴。

The evaluation of ecosystem service value based on land-use type is one of the effective ways to alleviate the negative ecological and environmental problems caused by rapid urbanization and population growth.We adopted the unit land-use type area ecosystem service value assignment method and the comprehensive index analysis of land-use degree to evaluate ecosystem service values and the change trend of land-use type from the administrative unit and grid scales under long time periods.The results show that①besides Pingwu County,Santai County and Yanting County,the comprehensive index of land-use in the study area have generally increased.②The ecosystem services values is significantly decreasing from 2000 to 2020,due to the increase in the area of construction land.③The ecosystem service value of cultivated land is negatively related to the total ecosystem service value,however,the ecosystem service values of grassland,water body,construction land are positively related to the total ecosystem service value.In summary,the comprehensive index of land-use in Mianyang City has increased,and the total ecosystem service value has decreased,which can provide a theoretical basis for the land-use management and planning based on regional ecosystem.