SPATIAL HETEROGENEITY OF THE EFFECTS OF HUMAN ACTIVITIES ON ECOSYSTEM HEALTH OF A COASTAL TOURISM CITY- A CASE STUDY OF RIZHAO, CHINA

Under the background of rapid urbanization, increasingly intensive human activities have seriously affected the health of the regional ecosystem, which as a whole is facing potential risk from structural damage to functional disorder. Therefore, an in-depth study of the spatial heterogeneity of the effects of human activities on ecosystem health is of great significance for regional environmental management and sustainable development. Taking the typical tourist city in China -Rizhao as the subject of the study, this paper used VORS model, spatial autocorrelation model, global regression model and geographically weighted regression model to quantitatively analyze the spatiotemporal evolution of the ecosystem health and the spatial heterogeneity of impacts of human activities on ecosystem health in Rizhao. The results show that the ecosystem health level of Rizhao City showed a significant spatial differentiation pattern from 1990 to 2018. The impact of human activities on ecosystem health in the study area has spatial heterogeneity. The built-up areas, central basins and coastal landscape belts of districts and counties are greatly affected by land urbanization, population urbanization and tourism activities. The agricultural areas of the plain and the areas around the built-up areas are greatly affected by agricultural activities and environmental pollution. Due to the spatial heterogeneity of the impact of driving factors on ecosystem health, spatial differences can be taken into account in the formulation of environmental management policies, so as to make the regulation and control countermeasures more targeted.