基于土地利用的晋江流域生态系统服务价值时空变化

Spatial-temporal Change of Ecosystem Service Value in Jinjiang River Basin based on Land Use

近年来,生态环境保护成为了热点话题。研究土地利用变化对河流流域生态服务功能价值的影响,可以促进流域生态环境保护和资源合理配置。本研究以晋江流域为研究对象,采用经本地化校正的当量因子法和GIS空间分析技术,分析晋江流域2000、2010和2020年三期的土地利用变化特征与生态系统服务价值(Ecosystem Services Value,ESV)时空变化的关系。结果表明:(1)2000—2020年,从数量变化上看,耕地降幅最大,为10.12%;建设用地面积增加最多,为48.64%。(2)流域大部分区域的ESV处于变化不显著的状态,损失冷点区主要分布在晋江中下游的建成区,增值热点区主要分布在晋江水体及山美水库库区周围。(3)研究期间,晋江流域的生态系统服务总价值呈现先下降后上升的变化。水体和耕地是研究区ESV变化的主要贡献因子,其中耕地为负向贡献因子,贡献率为-24.50%,水体为正向贡献因子,贡献率为47.42%。

In recent years,ecological environmental protection has become a hot topic.Studying the impact of land use changes on the value of ecological service functions in river basins can promote ecological environmental protection and rational allocation of resources in the basin.This study takes the Jinjiang River basin as the research object,and uses the localization-corrected equivalent factor method and GIS spatial analysis techniques to analyze the relationship between land use change characteristics and the spatial and temporal changes of Ecosystem Services Value(ESV)in the Jinjiang River basin for the periods of 2000,2010 and 2020.The results show that:(1)from 2000 to 2020,in terms of quantitative changes,arable land decreased the most,at 10.12%,and the area of built-up land increased the most,at 48.64%.(2)ESV in most areas of the basin was in a non-significant state of change,with cold spots of loss mainly distributed in the built-up areas in the middle and lower reaches of the Jinjiang River,and hot spots of value-added mainly distributed around the Jinjiang River water bodies and the reservoir area of Shanmei Reservoir.(3)During the study period,the total value of ecosystem services in the Jinjiang River basin showed a change of first decreasing and then increasing.Water bodies and cropland were the main contributors to ESV changes in the study area,with cropland as a negative contributor with a contribution rate of-24.50%and water bodies as a positive contributor with a contribution rate of 47.42%.