黄河流域城镇化与生态系统服务的时空互动关系

黄河流域是中国重要的生态廊道,黄河流域的生态安全关系着全国的生态安全水平。理清城镇化与生态系统服务之间的空间互动关系是黄河流域可持续发展的基础。通过分析2000-2018年黄河流域城镇化发展特征以及生态系统服务的空间分布格局,利用Pearson相关系数和双变量空间自相关方法进一步揭示了黄河流域城镇化和生态系统服务的时空作用关系及演变特征。结果表明:(1)2000-2018年黄河流域城镇化水平整体提升,综合城镇化指数增长了102.60%,经济城镇化发展速度普遍高于土地城镇化和人口城镇化,城镇化水平具有显著的空间差异性;(2)2000-2018年黄河流域粮食生产、固碳和土壤保持分别增长了65.32%,59.47%和46.27%,而产水服务减少了21.15%;(3)黄河流域城镇化与生态系统服务之间的关系在时空尺度上表现出了正向效应的减弱和负向效应的增强,并且城镇化和生态系统服务发展不协调的区域在不断扩张。

Analysis of the Spatial and Temporal Interactions Between Urbanization and Ecosystem Services in the Yellow River Basin

As an important ecological corridor in China, the Yellow River Basin (YRB) plays an important role in maintaining China''s ecological security. Understanding the spatial interactions between urbanization and ecosystem services is the basis for sustainable regional development. Based on the characteristics of urbanization development and the spatial distribution pattern of ecosystem services in the YRB from 2000 to 2018, the spatial and temporal interaction relationship and evolutionary characteristics of urbanization and ecosystem services in the YRB were further revealed using Pearson correlation coefficient and bivariate spatial autocorrelation. The results showed that:(1) The urbanization of the YRB had a significant spatial heterogeneity, and the comprehensive urbanization index increased from 2000 to 2018, with a growth rate of 102.60%, among which the development of economic urbanization was generally faster than that of land urbanization and population urbanization. (2) Food production, carbon sequestration services and soil conservation in the YRB increased by 65.32%, 59.47% and 46.27%, respectively, while water yield decreased by 21.15%. (3)The relationship between urbanization and ecosystem services in the YRB from 2000 to 2018 showed a weakening of the positive effect and an increase of the negative effect at both spatial and temporal scales, and the areas where the development of urbanization is not coordinated with ecosystem services are expanding.