| The Beijing-Tianjin-Hebei region is administratively composed of three independent units:Beijing,Tianjin,and Hebei Province.However,due to the cross regional flow of ecological resources and the increasingly interconnected ecological space,the Beijing-Tianjin-Hebei region is actually a complete and open sector.There is a serious inconsistency in the ecological pace between Beijing,Tianjin,and Hebei Province,which has led to issues such as the difficulty in coordinating the operation of resources and environmental degradation.These issues constrain the development of the Beijing-Tianjin-Hebei region and are likely to worsen with economic development.Therefore,it is extremely important to understand the overall quality of the ecological environment in the Beijing-Tianjin-Hebei region and rationally delineate the ecological restoration zoning of the land space.This study takes the Beijing-Tianjin-Hebei region as the research area,integrates land use data,soil data,meteorological data,and uses multiple models such as In VEST,CSLE,ESDR,and CESD to evaluate the supply and demand of regional ecosystem services and their supply and demand relationships.15 indicators are selected from five perspectives to evaluate the level of ecosystem resilience,and the spatial overlap between the supply and demand matching relationship and the ecosystem resilience zoning is conducted to delimit ecological restoration zoning,Corresponding optimization strategies are proposed and the following conclusions are obtained:(1)From the perspective of the spatial distribution of ecosystem service supply and demand,the spatial distribution of various services is quite different,but it shows certain rules.The high-value areas of food supply in the Beijing Tianjin Hebei region are mainly located in the North China Plain,the high-value areas of carbon fixation,water production,leisure and recreation services are mainly located in the Yanshan Taihang Mountains,the high-value areas of soil conservation services are mainly located in the hilly and coastal areas.The high value areas of ecosystem service demand are mainly concentrated in the central and southeastern cities of Beijing-Tianjin-Hebei,while the demand for ecosystem services in the northern mountainous areas and plateaus of Beijing-Tianjin-Hebei is low.(2)The supply and demand of ecosystem services in the Beijing-Tianjin-Hebei region is medium-high deficit area and medium deficit area,accounting for 0.75%and 5.03%respectively,and the surplus area accounts for more than half of the study area,and the supply and demand of ecosystem services is good.The matching relationship between supply and demand of ecosystem services in the Beijing-Tianjin-Hebei region can be divided into four types:equal supply and demand(56 districts and counties),low supply and high demand(65 districts and counties),equal supply and demand(38 districts and counties),and high supply and low demand(41 districts and counties),showing a significant spatial mismatch.(3)The spatial distribution of ecosystem resilience is significantly different,which is mainly related to geographical conditions,topographic conditions and land use distribution.The high value area of ecosystem resilience is mainly concentrated in the northeast region of Beijing,Tianjin and Hebei.Although the elevation is higher than that of the plain area,it has good precipitation and soil conditions,high landscape diversity index and ecological elasticity,and the ecosystem is less disturbed by humans.The northwest of Zhangjiakou has poor hydrothermal conditions,fragile ecology and low resilience.(4)Superimposing the matching relationship between supply and demand of ecosystem services and ecosystem resilience,Beijing-Tianjin-Hebei is divided into 6 types of ecological restoration zones,and corresponding restoration strategies are proposed.In the"Ⅰ-1 High Supply High Demand High Resilience" zone,it is necessary to carry out more farmland water conservancy projects,enhance soil fertility,improve soil,increase forest cultivation,and prevent ecological deterioration."Ⅱ-1 Low Supply High Demand Low Resilience" zoning should control urban development boundaries,and build"green corridors" and"blue corridors" to reduce urban ecological pressure."Ⅱ-2 Low Supply High Demand High Resilience"zoning should rely on the existing river network and water system as a framework to carry out ecological restoration work."Ⅲ-1 Low Supply Low Demand Low Resilience" zoning should adjust the agricultural structure,protect existing forests and grasses,curb land desertification,and reduce soil erosion."Ⅲ-2 Low Supply Low Demand High Resilience" zoning should focus on reducing human interference,attach importance to regional protection,and comprehensively enhance various ecological capacities in the Taihang Mountains.The "Ⅳ-1 High Supply Low Demand High Resilience" zone should coordinate with the advantages of the ecological environment base and carry out production and life guided by green development.This study follows the concept of human-land harmony,starting from the relationship between the supply and demand of ecosystem services and the difference in ecosystem resilience,constructs and discusses the ecological restoration zoning of land space in the Beijing-Tianjin-Hebei region,taking into account the interactive relationship between human social needs and natural resources in space,and then proposes targeted and feasible measures for joint ecological restoration of land space in the three regions.To some extent,this study is a supplement to the existing research system on ecological restoration zoning,and can also provide a certain reference for the ecological restoration zoning and optimization of land space in the Beijing Tianjin Hebei region. |
PDF Full Text Request