黄河中游城镇化与生态系统服务耦合关系的时空变化

城镇化是影响区域生态安全格局的重要因素,厘清城镇化与生态系统服务之间的关系,可为促进黄河流域生态保护与高质量发展提供决策参考。在分析2000—2018年黄河中游城镇化与生态系统服务时空格局的基础上,采用耦合协调度模型剖析了二者耦合关系的时空变化特征。研究发现：2000—2018年间,黄河中游地区综合城镇化水平提高72.24%,空间分布总体呈“南高北低”、以经济发达县区或城市群为中心向外递减的趋势;粮食生产、水源涵养、土壤保持和固碳服务量均呈增加趋势,且呈不同的空间分布态势;粮食生产、水源涵养、土壤保持和固碳服务与综合城镇化水平的耦合协调度总体呈上升趋势,但汾渭平原的耦合协调度普遍较低,而经济发达县区的耦合协调度普遍较高。

Spatio-temporal changes of the coupling relationship between urbanization and ecosystem services in the Middle Yellow River

Urbanization is an important factor affecting the pattern of regional ecological security.Clarifying the relationship between urbanization and ecosystem services can provide decision-making references for promoting ecological protection and high-quality development in the Middle Yellow River.Based on the analysis of the spatio and temporal patterns of urbanization and ecosystem services in the Middle Yellow River from 2000 to 2018,the study uses the coupling coordination degree model to analyze the spatio-temporal characteristics of the coupling relationship between urbanization and ecosystem services in the study area.The results show that between 2000 and 2018,the comprehensive urbanization level increased by72.24%,and the spatial distribution was generally"high in the south and low in the north",with economically developed counties decreasing outward.Grain production,water resource conservation,soil conservation and carbon sequestration services all showed an increasing trend in different spatial distribution trends.Generally,the degree of coupling coordination between grain production,water resource conservation,soil conservation and carbon sequestration services and comprehensive urbanization level is on the rise,but the degree of coupling coordination in the Fenhe-Weihe Plain is low,while that in economically developed counties is high.