摘要
以珲春市为研究区,综合人口、经济、结构和功能等方面对市域各乡镇的城市化水平进行分析后得出:市区发达型、市区周边次发达型和边远地区不发达型的城市化水平自市区向周边呈先陡后缓的下降趋势。选择生物多样性维持、绿色植物生物量、涵养水源和旅游娱乐功能为指标,对处不同城市化水平的区域进行综合生态服务功能指数的分析。结果表明生态服务功能的空间分布与城市化的空间格局基本是相逆的过程:市区次低,边远区高,市区周边低。两者综合看,边远地区生态效益指数高于城市化指数,生态系统的基本功能健全;市区城市化指数高于生态效益指数,生态系统已受到城市化的胁迫;市区周边综合效益最差,生态功能受损。城市化的发展必须重视两个效益的协同发展,特别是城乡交错带。
Urbanization is one of the important processes of modernization. The development of urbanization must take the ecological environment into account. This article takes Hunchun as the research area and analyzes the level of urbanization in city scale by synthesizing demographic, economic, structural and functional indicators. The urbanization level can be divided into three types :advanced urbanization in urban district, developed urbanization in city surrounding areas and the underdeveloped urbanization in remote border district. A conclusion could be made that the downward trend of unbannization level is eased after steeply from city center to the surrounding areas. We analysize the integrated ecosystem services index in areas of different urbanization levels, choosing maintenance of biological diversity, biomass of plants, water conservation and entertainment funtion as indicators. The result shows that the spatial distribution of ecosystem services is the inverse process of urbanization pattern : high ecological efficiency in central city,lower in remote border district and the lowest in city surrounding areas. Comprehensively ,the index of eco-efficiency is higher than that of urbanization level in remote areas ,and the fundmental function of ecosystem is good . The index of eco-efficiency is lower than that of urbanization level in center city,and the fundmental funtion of ecosystem has been under the stress of urbanization. The city surrounding areas has the worst integrated eco--efficiency, and its ecological function is damaged, we must attach the importance to the development of the two-effective collaborative development, especially in the urban and rural ecotone.
出处
《三峡环境与生态》
2008年第2期4-9,共6页
Environment and Ecology in the Three Gorges
关键词
珲春
城市化
生态效益
Hunchun
urbanization
ecological efficiency