Research On Ecological Spatial Layout Of Longxian County Based On Priority Determination Of Ecosystem Services

In recent years,rapid urbanization and rapid economic development have led to the continuous interference of ecological spaces by human activities,resulting in frequent conflicts between ecological protection and economic development.For the research area of Longxian County,Baoji City in this study,during the process of land spatial planning,the upper level planning shifted its main function positioning to a national key ecological functional area.As a restricted development zone,it prioritizes protecting and repairing the ecological environment,providing ecological products,and implementing control over various development activities.From the existing planning perspective,the planning space of some economic construction activities overlaps with the ecological space of the county,resulting in spatial conflicts,resulting in trade-offs between multiple ecosystem service functions within the same spatial unit,affecting the diversified supply capacity and coordinated development of ecosystem services.In order to alleviate the problem of spatial conflict in the county,this study starts from the perspective of ecosystem service trade off decision-making,and under the support of GIS spatial analysis,In VEST assessment model,spatial statistics and other models,determines the key ecosystem service types in the county.Determine the optimal ecosystem service trade-off decision scenario through multi scenario simulation,identify the county ecological space based on this,combine with the existing planning pattern,propose the layout structure and optimization suggestions of the county ecological space,and reduce related functional conflicts within the county ecological space.This study is divided into 6 chapters.The first chapter is an introduction.Firstly,clarify the specificity of the research object and the typicality of the problem based on the proposal of practical problems;Secondly,through a literature review on issues related to ecological restoration of national land space and conflicts between ecological protection and economic development,the response domain of practical problems is clarified,and disciplinary and key scientific issues are proposed: how to construct the ecological spatial layout structure of Longxian County based on the priority ranking of various key ecosystem services? Furthermore,clarify the research perspective and tools and methods for problem-solving.Chapter 2 is the research tools and technical roadmap.Clarify the relevant concepts involved in the research;Clarify the basic theoretical tools of this study by sorting out real-life issues,disciplinary issues,and key issues;Provide an overview of the principles and usage methods of the selected technical tools through review;Propose an analytical framework and technical roadmap for the study.Chapter 3 is the analysis of key ecosystem services and their interactions in Longxian County.Based on the specific spatial scale of the occurrence of ecosystem services and the research object’s own conditions,determine the key ecosystem services in Longxian County,evaluate their spatiotemporal dynamic changes,and then complete correlation evaluation and analysis,reflecting the balance and collaborative relationship between key ecosystem services.Chapter 4 is a simulation of the priority of key ecosystem services in Longxian County.Introduce a multi-attribute decision-making model,use OWA operator to simulate key ecosystem service priority scenarios,and determine the optimal scenario based on the protection efficiency and trade-off of each ecosystem service.Chapter 5 is the identification and layout optimization of ecological spatial pattern in Longxian County.Identify the ecological spatial pattern of Longxian County through the construction of an ecological network,and control and classify the structure and function of the county’s ecological space.Integrate and analyze the ecological space with the existing constructive planning pattern,select key nodes,and combine the ecological network to form the county ecological space layout structure.Chapter 6 is the conclusion section.The main conclusions of the study are:(1)Key ecosystem services in Longxian County include soil conservation,habitat quality,water conservation,food supply,and ecological leisure.From 2000 to 2020,the trade-off between ecological leisure,food supply,and other key ecosystem services in Longxian County continued to intensify,with a synergistic relationship maintained between water conservation,soil conservation,and habitat quality.(2)The priority ranking of the best ecosystem services in Longxian County is: soil conservation>water conservation>recreational services>food supply>habitat quality.In this scenario,the high-value areas of comprehensive ecosystem services are evenly distributed within the county,and the priority protected area for the importance of comprehensive ecosystem services is 479.38 square kilometers,accounting for 20.98% of the total area of the county.(3)Integrate the existing planning pattern,combine with the analysis of county ecological issues,and construct the ecological spatial layout structure of Longxian,forming an ecological spatial layout structure of "one center,one axis,one ring,two areas,two belts,and multiple nodes".