Research On The Construction Of Ecological Security Pattern In Yancheng Coastal Area

The rapid urbanization of coastal areas has put tremendous pressure on the ecological security of the region,and has negatively affected the human settlement environment and social and economic development.The coastal area of Yancheng City is under the dual background of ecological wetland protection demand and coastal development strategy.The contradiction between ecological environment and social economic development is particularly prominent.This article conducts research on the regional ecological space structure,and proposes countermeasures to ensure the ecological space and optimize the allocation of resources,so as to alleviate the tense human-land relationship in the region and promote the ecological stability and sustainable development of the region.This paper provides a reference for the ecological space layout of the coastal area of Yancheng by constructing an ecological security pattern.After analyzing the characteristics of the coastal area,based on the least cumulative resistance model,the method of "sourcecorridor" is used to identify and identify the ecological space.The construction of the security landscape.Combining ecological service value and ecological environment sensitivity to screen ecological sources;construct spatial resistance surfaces according to the difference in resistance of land use types and road traffic facilities to species spatial movement;use GIS distance cost analysis to quantitatively identify ecological corridors and arrange ecological nodes;On this basis,combined with the source buffer zone,the ecological security pattern in the coastal area of Yancheng City is obtained.The construction results are compared with the ecological spatial structure planning and current situation of the area,the relevant differences and the existing deficiencies of the ecological space are sorted out,and the countermeasures for the optimization of the ecological security pattern in the coastal area of Yancheng City are proposed.This paper draws the following conclusions: The ecological sources in the coastal areas of Yancheng City are mainly distributed in the central and southern regions,adjacent to the current nature reserves,and the number of high-level ecological sources is relatively small and more concentrated;a comprehensive spatial resistance surface has been constructed;Quantitative calculations have obtained the distribution of ecological corridors and their hierarchical system.The results show that there are a large number of east-west corridors,but the degree of network is low,there is a lack of high-level corridors in the north-south direction,and the ecological corridors along the coastline are of lower level And the fragmentation is serious;the source area,corridors,nodes,and ecological source buffer area are integrated to obtain the final ecological security pattern in the coastal area of Yancheng.Finally,by comparing and sorting out the existing problems of the ecological spatial pattern in the coastal area of Yancheng City,the overall optimization strategy is proposed from three aspects: establishing an ecological value orientation,ensuring the ecological map base and strengthening ecological supervision;from darning the ecological space network and increasing the amount of source patches Propose specific optimization measures in four aspects: building a corridor classification system,and reshaping ecological strategic nodes.Through the construction of the ecological security pattern,by optimizing the distribution of ecological system space resources in the coastal area of Yancheng City,the local ecological environment will be restored and the local ecological environment will be improved,and the stability of the ecological system will be improved.Provide countermeasures and suggestions for alleviating the tension between people and land in the region and promoting the coordinated development of regional ecological environment and social economy.