| 摘 要： |
With a background of globalization and urbanization, the population agglomeration puts tremendous pressure on the ecosystem inside and around the city. Compared with ordinary cities, ecological protection for resource based cities is more urgent. The construction of green infrastructure can alleviate the environmental constraints of urban development to a certain extent., and it contains a vital landscape element, ecological node, which is of great significance. Therefore, the purpose of this paper is to discuss ecological nodes based on different threshold selections of shape and distance to changes landscape network connectivity. Regarding the service accessibility of the green infrastructure network, a new cognition is to break the traditional land-use map and patches, while providing a new reference to enhance network connectivity by ecological nodes depicted as circles as the core, 400 m as the optimal threshold as transmission distance for ecosystem service evaluation and optimization. This new optimization method of ecological nodes strengthens the connectivity of green infrastructure networks through small changes within ecological nodes, reduces the ecological resistance of key positions of green infrastructure networks through land-use change of ecological nodes, in order to improve the ecosystem service connectivity for Wu'an or other resource-based cities. |
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