| Studies on ecosystem service function are currently a hot problem.Under the contradiction between social and economic development and increasing ecological and environment,analysis assessment of ecosystem service functions is an urgent need for promoting economic,social and ecological coordinated development.In this paper,relying on the general program of national natural science of foundation of China"Study on Ecological Compensation Mechanism of Watershed under Dual Control of Water Quality and Quantity"（51879241）and the major collaborative innovation project of Zhengzhou city"Research on The Mechanism and Joint Regulation method of River Basin Water and Soil Resources Co-evolution" （32211643）,this paper studied the quantitative method system and spatial correlation analysis of regional water-land ecosystem service function energy evaluation,and took Luoyang city as a case study.The main research contents and results are as follows:（1）Establish the evaluation system of water-land ecosystem service function and quantify it based on emergy theory.Based on the MA classification method,the production mechanism of the ecosystem service function is analyzed in the forest,grassland,aquatic ecosystem service function,and classify the function according to the supply function,adjustment function,support function,and cultural function,and finally optimize the water-land ecology.System service function evaluation system.According to the constructed evaluation system,the energy value is quantified based on the energy value of the supply function,adjustment function,support function,and cultural function of the forest,grassland,support function,and cultural function based on energy value theory.（2）Spatial autocorrelation and breaking point theory were introduced to analyze the spatial characteristics of ecosystem services.Combined with the study of ecosystem service function,the integration of the overall spatial interconnection characteristics of the ecosystem service function is analyzed from the global and local spatial index from the global and local spatial self-correlation angles.Based on the fracture point theory,The radius,radiation range,and radiation intensity of the system service function is determined,and analyze the spatial flow of the ecosystem service function.（3）Take Luoyang city as an example for case analysis.Firstly,the water-land ecosystem service function emergy of Luoyang city and all administrative regions from1995 to 2020 was quantified,and the total emergy was obtained as follows 6.15×1022,6.20×1022,6.98×1022,7.30×1022,7.40×1022,6.61×1022sej.The forest ecosystem service emergy was the highest,the aquatic ecosystem emergy coefficient was the highest,and the core function of the region gradually shifted to recreational function.The results of univariate Moran index analysis showed that forest ecosystem services showed a strong positive correlation,with a high value aggregation in the southwest and a low value aggregation in the northeast.Grassland ecosystem services gradually increased from negative correlation to weak positive correlation,and the spatial distribution of aquatic ecosystem was discrete.Bivariate Moran index analysis showed that there was a strong positive spatial correlation between forest and grassland ecosystem services,and there was a certain degree of synergy between forest and aquatic ecosystem.The total spatial transfer of water-land ecosystem services in Luoyang city in 2020 was 5.83×1020sej.The radiative transfer of the region with higher functional energy was also more.The specific spatial transfer of each administrative region was calculated and analyzed.The research on the water-land ecosystem service function in Luoyang city can strengthen people’s awareness of environmental protection and provide some scientific basis for regional management and ecological compensation. |
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