Ecosystem Services Trade-off And Supply In Ecological Conservation Area Of Fujian Delta Urban Agglomeration

With the rapid urbanization of the urban agglomerations in the With the rapid advancement of the urbanization of the Fujian delta,the population surge,the reduction of natural land and agricultural land,and the continuous expansion of construction land,the ecosystem service products and services acquired by human activities are increasing,and the contradiction between man and land has gradually emerged.It has become a problem to be solved in the process of urbanization.The evaluation methods for ecosystem services have gradually matured,of which the value method,material quality method,and emergy analysis method are the most commonly used,and each method can exert the best measure in its own use of the categories and fields.Due to over-abstraction of ecosystem services or products by human activities,energy flow and information transformation occur between different ecosystems and within the ecosystem,which affects the structure,function,and process of ecosystems.Therefore,research on ecosystem services has been conducted.Scholars are more concerned with the trade-offs or synergies arising from the dynamic changes between ecosystem services and the internal functions of ecosystems.At the same time,the supply of ecosystem services and the demand for urban development and the process of energy flow and interaction between them are becoming frontiers and hotspots of research.However,domestic supply and demand research is still in its infancy.Based on the emergy analysis method,this paper evaluates the ecological service value of the ecological conservation areas of the Yangtze River Delta in 2000,2005,2010,and 2015,and studies the changes in the energy values of the four supply services and the four support service functions.The district ecosystem is divided into three sub-systems:forest ecosystem,farmland ecosystem and water ecosystem.The changes in the ecosystem service value in the study area and the proportion of each function in the subsystems are analyzed.The software is displayed using ArcGIS10.1 software.The spatial distribution differences of ecosystem service value.The application of correlation analysis and ecosystem services trade-offs(ESTD)model analysis to study the trade-offs or synergies between the various functions of ecosystem services in the district and the quantification of their trade-offs or synergies.Taking the calculation of urban water resources demand and food demand energy value as an example,we establish a one-to-one index system of the supply function of the research area and the development demand of the urban agglomeration,and analyze whether the water supply and food supply in the study area meets the needs of the Heze Triangle urban agglomeration..This paper estimates the value of ecosystem services in the ecological conservation areas of the Fujian delta region,analyzes the trade-offs and synergies between the functions of the ecosystem services in the study area,and studies the supply and demand of the Fujian delta region urban agglomerations and their ecological conservation areas in terms of water resources and food.The construction of ecologically-civilized cities,ecological compensation,and rural revitalization in the Triangular City Clusters provide a reference for humans to manage the ecosystem and maintain the sustainable development of regional economy and ecology.