摘要
本文基于2000、2010、2018年土地利用数据,应用ArcGIS、Fragstas、GeoDa等软件,以金沙江流域为研究区,分析了2000–2018年研究区生态系统服务价值(ESV)和景观生态风险(LER)的时空演变,在此基础上,采用双变量空间自相关和空间回归模型,探讨了二者之间关系。结果表明:(1)2000–2018年金沙江流域林地、草地、水域、建设用地增加,耕地和未利用地减少,其中未利用地的减少和建设用地的增加较为突出。(2)2000–2018年研究区生态系统服务价值由20188.94亿元到20919.79亿元,共增加730.85亿元;整体景观生态风险指数由0.01029降低到0.01021,低风险区和高风险区面积均有增加,表明区域整体生态环境得到改善,但仍有个别地区生态环境恶化。(3)研究区景观生态风险与生态系统服务价值在空间上存在正相关关系,表现为高风险-高价值的集聚特征,且景观生态风险对各项生态系统服务价值均有正向影响,尤其对调节服务的影响最大。研究结果可为调控区域生态风险,提高生态系统服务,改善流域生态环境质量提供参考。
Based on the land use data of 2000,2010,and 2018,ArcGIS,Fragstas,and GeoDa software were used to assess the spatial and temporal evolution of ecosystem service value(ESV)and landscape ecological risk(LER)in the Jinsha River Basin from 2000 to 2018.Their relationship was subsequently examined using bivariate spatial autocorrelation and spatial regression models.The results indicate three important aspects of this system.(1)Between 2000 and 2018,the woodland,grassland,water area,and construction land rose,while the cultivated land and unused land declined,among which the decrease in unused land and the increase in construction land were more prominent.(2)From 2000 to 2018,the value of ecosystem services in the study area increased by 73.09 billion yuan,from 2018.89 billion yuan to 2091.98 billion yuan,while the overall landscape ecological risk index decreased from 0.01029 to 0.01021.The areas occupied by both low-risk and high-risk areas increased,indicating that the ecological environment in the region as a whole has been improving.However,there are still localized areas with deteriorating ecological conditions.(3)There is a positive spatial correlation between landscape ecological risk and ecosystem service values in the study area,demonstrating a high-risk-high-value clustering characteristic,and the landscape ecological risk has a positive effect on the value of all ecosystem services,particularly the value of the regulation services.The findings of this study can be used as a guide for reducing regional ecological risks,enhancing ecosystem services,and enhancing the quality of the ecological environment in the basin.
作者
刘凤莲
杨磊
王舒
LIU Fenglian;YANG Lei;WANG Shu(Institute of Land&Resources and Sustainable Development,Yunnan University of Finance and Economics,Kunming 650221,China)
基金
The Scientific Research Fund Project of Yunnan Education Department(2021J0592)
The Yunnan University of Finance and Economics Programme(2022D13)
The Graduate Student Innovation Fund Project of Yunnan University of Finance and Economics(2022YUFEYC098)。
