| With the gradual acceleration of China’s urbanization process,many problems caused by the continuous expansion of urban development space have become increasingly prominent.This thesis is based on the National Natural Science Foundation of China(NSFC)project "the study on the evolution mechanism and multi-dimensional reconstruction of rural landscape based on landscape gene map: a case study of the humid and hot area in Huangpi District,China".As an active area of land use change and a transitional area between urban and rural areas,urban fringe has become a very sensitive area in the process of urbanization because of its unreasonable development pattern.In this paper,based on the theory of landscape pattern correlation,the landscape pattern of landscape ecology studied,using RS technology,GIS technology and Fragstarts landscape pattern analysis software,the landscape pattern evolution characteristics of Huangpi District City fringe area in Wuhan from 2003 to 2019 were analyzed Based on the minimum resistance model,a branch network of potential ecological corridors is constructed,and the potential ecological benefits of nodes and corridors in the network structure are evaluated according to the corresponding indexes,it is expected to provide a case reference for the study on the landscape pattern of urban fringe and a theoretical basis for the policy making and planning of the landscape pattern optimization in this area.The main conclusions of this paper are as follows:(1)The composition of landscape elements in the study area has changed significantly with the development of the urban fringe in Huangpi District Wuhan,and the mutual transformation of landscape elements in the study area is obvious and very complex,among these landscape elements,there is a general situation of mutual transfer and transfer.Construction Land and bare land increased by 115.36 km2 and 8.92 km2 respectively,while farmland,forestland and water area decreased by 62.76 km2,22.98 km2 and 38.55 km2 respectively.(2)The landscape pattern of the study area has changed to a greater extent,the spatial shape complexity of all patches in the landscape decreased slightly,the richness of patch spatial shape types decreased but the fragmentation increased,the agglomeration degree of patch types decreased and showed a trend of extension,the aggregation degree and connectivity of all patches in the landscape decreased,and the landscape heterogeneity in the landscape system gradually increased but the dominant patch types showed a trend of continuous reduction.(3)The reasonable construction of the ecological corridor branch network is beneficial to strengthen the spatial structure and connectivity of the landscape pattern in the urban fringe of Huangpi District,Wuhan.Through the construction and analysis of the potential ecological corridor branch network by the minimum resistance model and the selection of the corresponding index to evaluate the network structure,finally,600 m and 300 m ecological buffer zones were set outside the ecological source and the ecological gathering point to optimize the connectivity and stability of the spatial structure. |
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