城市中心区绿地系统生态承载力空间格局研究

基于植被净初级生产力的生态承载力评估方法,采用MOD17A3数据并结合分区统计、空间自相关和锡尔指数等方法,研究大连市中心区绿地系统生态承载力的空间特征、格局和机制。结果显示:大连市中心区整体NPP平均值为197.68 gC/m2,Moran’s I指数为0.73,空间差异指数为0.13;生态承载力具有"极低"和"极高"级分化的特征,聚类特征和空间分异主要表现在甘井子区;生态承载力呈现出"西高东低"的网格格局、"乡村型高城市型低"的社区格局和"内低外高"的圈层格局。文章首次分析了自然因素和人类活动共同作用下,生态承载力空间格局的作用机制,研究结论对城市绿色空间可持续发展和绿地系统建设具有重要意义。

Study on Spatial Pattern of Ecological Capacity of Green Space System in Urban Center

Based on the regenerated net primary dynamic ecological carrying capacity assessment method,using MOD17A3 data combined with zoning statistics,spatial autocorrelation and the Sear index,etc.,the spatial characteristics,layout and mechanism of the ecological carrying capacity of the green space system in Dalian’s downtown area were studied.The results show that the overall NPP increment of the central city in Dalian is 197.68 gC/m2,the Moran’s I index is 0.73,and the spatial difference index is 0.13.The ecological carrying capacity has the characteristics of "very low" and "very high" differentiation.The clustering characteristics and spatial differentiation are mainly manifested in the Ganjingzi area.The ecological carrying capacity presents a grid layout of "west is high and east is low",a community pattern of "rural type is high and a city is low" and a circle layout of "internal low and external high".It is the first time to analyze the mechanism of ecological carrying capacity spatial pattern under the joint action of natural factors and human activities.The research is of great significance to the sustainable development of urban green space and the construction of green space system.