Study On The Synergies And Tradeoffs Among Cultivated Land Ecosystem Services And Its Management Strategies

With the continuous development of industrialization and city in recent years,humans rely heavily on the ecological system and the degree of intervention are increasing,which has caused a series of social problems and ecological problems.How to make a coordination between the economic and social development and ecological system health is the common concern of all countries in the world.The ecosystem is heterogeneous in space,and there are dynamic and complex interactions between different ecosystem services,which usually show as synergies and tradeoffs.Cultivated land is one of the most important landform types on land surface.It's a semi natural and semi artificial ecosystem,which is deeply influenced by natural conditions and human activities.Clearing the relationship between cultivated land ecosystem services can provide theoretical guidance and practice for improving the management level of cultivated land,optimizing the structure and layout of cultivated land,and promoting the protection of cultivated land.Based on ArcGIS and SPSS software platform,this paper estimates the value of 5 kinds of cultivated land ecosystem services(food supply,carbon fixation,water conservation,habitat support and leisure culture)in Cixi county,Zhejiang Province,and analyzes its spatial distribution characteristics.Then based on the above calculation results,this paper uses Spearman rank correlation analysis,hot spots analysis and cluster analysis to reveal the space synergies and trade-offs relationships between cultivated land ecosystem services and to identify 4 different types of ecosystem services clusters.Finally,based on the dominant service types and coupling characteristics,this study offers proposals for the functional zoning and management practice of cultivated land ecosystem.The following conclusions are obtained:(1)The value method is used to evaluate 5 kinds of cultivated land ecosystem services including food supply,carbon fixation,water conservation,habitat support and culture and leisure services in Cixi.The 5 cultivated land ecosystem services in Cixi county are different in space.(2)On the basis of the assessment,the synergy and tradeoff relationship between different ecosystem services is analyzed.The results show that there are both synergies and trade-offs between supply services and regulatory services.There are trade-offs between supply services and cultural services,as well as support services.And there are synergies between regulation services and culture services and support services.(3)The distribution of hot spots in the 5 kinds of cultivated land ecosystem services is different and the relationships between ecosystem services affect the supply capacity of ecosystem services in different regions.(4)According to the dominant service types and coupling characteristics of the ecosystem service clusters,the cultivated land ecosystem in Cixi county is divided into 4 functional zones(soil conservation zone,ecological conservation zone,leisure agriculture zone and main grain producing zone),and the corresponding management suggestions are put forward.(5)On the basis of identifying the diversities and synergies and trade-offs relationships of cultivated land ecosystem services,the management strategy of cultivated land ecosystem is proposed.The first is to set up and deepen the multi-functional values of cultivated land;The second is to establish a multi-functional evaluation system for cultivated land;the third is to build a multi-functional value economic compensation mechanism for cultivated land;and the fourth is to optimize the multi-functional distribution of cultivated land.