Research on the Construction of Greenland Ecological Network and Identification of Ecological Nodes in Quanzhou City Based on MCR Modeling
The construction of greenland ecological network and the identification of ecological nodes play an important role in restoring the negative impacts of rapid urbanization and enhancing regional ecosystem service capacity and biodiversity.Taking Quanzhou City as the study area,compared and analyzed the changes of ecological sources and ecological resistance surfaces in 2 periods,2010 and 2020,explored the evolution of the spatial and temporal patterns of the greenland ecological niche network,used morphological spatial pattern analysis(MSPA)and gravity model to determine the ecological sources,construct ecological corridors,and identify the ecological nodes,and put forward the corresponding suggestions for layout optimization.The results show that:(1)The number of ecological source sites in Quanzhou City increased from 6 to 9 from 2010 to 2020,but there is a decreasing trend in the total area of ecological source sites.(2)During the 10-year period,the ecological resistance surface of Quanzhou City is centered on the high value of towns,and shows a tendency to expand in all directions in the form of points and blocks.(3)Using the gravity model,the corridors are divided into three categories,of which there are 1 corridor at the first level,10 corridors at the second level,and 13 corridors at the third level.(4)Identified 993 fracture points and 29 ecological nodes.(5)Three optimization strategies were proposed:protecting and supplementing ecological sources,building and optimizing ecological corridors,repairing ecological breakpoints and constructing ecological nodes to improve the stability of greenland ecological networks and enhance regional landscape connectivity.The results of this study can provide scientific references for the planning of greenland ecological network in Quanzhou City.
万方数据
维普
