The evaluation of ecosystem service of Yanqing Global Geopark in Beijing and the suggestions for ecological geology

Protecting the regional ecological environment is one of the major functions of the Global Geoparks.The Global Geoparks benefit the regional environment protection and the harmonious coexistence between man and nature. The study on the values of ecosystem services of global geoparks will provide technical support for improving the ecological functions of global geoparks. This study establishes the unit value of ecosystem services in China on the basis of the unit value model of global ecosystem services invented by Costanza et al, and evaluates the ecosystem services of Yanqing Global Geopark and adjacent areas from 2000 to 2020 via GlobeLand30 and Arcgis. The results show that the total values of ecosystem services of Yanqing Global Geopark has basically remained stable in the past 20 years, which are 3040 million CNY in 2000, 3103 million CNY in 2010, and 3086 million CNY in 2020 respectively.The values of forest ecosystem, grassland ecosystem and cropland ecosystem are dominated, accounting for more than 96% in total values of Yanqing Global Geopark ecosystem services.In terms of the characteristics of Yanqing Global Geopark, some suggestions for ecological geological survey are put forward as follows: the first is to strengthen the investigation on the components, structure, quality of forests and soil to improve the forest ecosystem; the second is to monitor the underground water and soil erosion to prevent further shrinkage of the wetland; the third is to interconnect the Guishui River basin and Gongting Reservoir water system to maintain the ecological flow; the fourth is to coordinate a comprehensive survey of different natural elements such as the mountains, water, forests, cropland, lakes and grassland on the basis of a systemic view to improve the total value of ecosystem services of Yanqing Global Geopark.The fifth is to establish a cross-departmental and cross-regional coordinating mechanism for promoting ecological protection.