Study On Ecological Space Restoration And Planning Strategies In Suburban Areas

With the rapid advancement of "ecological restoration of national land space",ecological space protection and restoration have become a key research direction in national land space planning.Scholars have also conducted relevant theoretical and practical research from the perspective of overall ecosystem protection and system restoration.As a transitional zone from urban to rural areas,suburban areas are more susceptible to the negative impact of urban expansion,construction land development,and other activities on their ecological space,The demand for ecological protection and restoration is also more urgent.Based on this situation,this study selects Choujiang Street outside the central city of Yiwu as the research object,and from the perspective of overall protection and restoration of the ecosystem,constructs the ecological space network of Choujiang Street through Fragstats landscape pattern analysis,GIS spatial analysis,AHP analytic hierarchy process and field research,and proposes the planning strategy of ecological space protection and restoration,To provide certain reference for ecological restoration research in suburban areas.Firstly,this study selected a total of 12 evaluation factors from the patch and landscape levels to analyze the current ecological spatial pattern of Choujiang Street.From the perspective of patches,arable land and water patches account for 33.4% of the total area of the study area,while forest land and garden land only account for 4.8%.The proportion of various patches is relatively unreasonable;There are a total of 47 cultivated land patches,with an average patch area of 22 hm~2,The area is large and the fragmentation degree is relatively low,and the core plaque dominance is obvious;The number of water patches is numerous,reaching 307,but the average patch area is only 0.8 hm~2,High degree of fragmentation;From the perspective of landscape,due to the impact of urbanization,there are significant differences in the area and types of ecological spaces between the north and south,with uneven spatial distribution,poor connectivity between various patch types,and low landscape richness,which need to be improved.Secondly,the ecological spatial network of Choujiang Street was constructed.By conducting an evaluation of the importance of ecosystem service functions and ecological sensitivity in Choujiang Street,the evaluation results of the importance of ecological space protection were obtained,and a total of 9.2 km~2 of extremely important ecological space protection areas were designated,Accounting for24.6% of the total area of the research area,based on which 8 ecological source areas were extracted,with a total area of 6.7 km ~2,Accounting for 18.1% of the total area of the research area;Based on the constructed regional ecological resistance surface,the MCR minimum cumulative resistance model,gravity model,and relevant data were used to identify 8 ecological corridors and 14 ecological obstacle points in the study area,including 5 primary corridors and 3 secondary corridors,totaling 26.6 km;Optimize the ecological network based on the actual situation of Choujiang Street,adjust the range of ecological sources,and add 1 road type ecological corridor and 1 river type ecological corridor.Finally,based on the analysis of the current landscape pattern and ecological network structure layout,a planning strategy for ecological space restoration was proposed.Divide the ecological source areas in the ecological network into park type,farmland type,and water type,and implement classified protection;Divide the identified ecological corridors into current protection and improvement types and comprehensive renovation and restoration types,and optimize their overall layout;The optimization strategies for the construction of biological channels and the renewal of plant community are proposed for the ecological obstacles;And proposed the main ecological space types,including water bodies,villages,farmland,and towns,for the Choujiang Street Landscape pattern optimization strategy to promote the rationality of its spatial layout.The research results can provide reference for the formulation of relevant ecological protection and restoration plans.