IMPACTS OF LANDSCAPE PATTERN ON ECOSYSTEM SERVICES AND THE SPATIAL OPTIMIZATION OF AGRICULTURAL PRODUCTION REGION——A CASE STUDY OF BEIJING
This paper aims to enhance the ecological sustainability of agricultural region by analyzing the driving factors of ecosystem services(ESs)and put forward spatial optimization strategies.Taking Beijing as a case study,we assessed multiple ESs by adopting the integrated valuation of ecosystem services and tradeoffs(InVEST)and recreation opportunity spectrum(ROS)models,and identified ESs bundles through K-means clustering method,then identified the agricultural functional region.Moreover,the dominant factors affecting ESs in agricultural region were explored by using geographical detectors.Based on the influencing factors,we developed different optimization scenarios that could improve ESs by exploring various strategies of land use composition and spatial configuration.The results showed that:(1)The agricultural region in Beijing was mainly distributed in the eastern and southern areas,accounting for 26％of the total area.(2)In agricultural region,carbon storage was mainly influenced by slope,while habitat quality was mainly influenced by normalized vegetation index.Food production was influenced by landscape diversity,gross domestic product and chemical fertilizer.(3)Food production increased the most under the cropland conservation scenario,while habitat quality,recreation opportunity,and most of ESs all increased under the comprehensive optimization scenario.In conclusion,the results of spatial-temporal evolution,driving mechanism,and spatial optimization in this study can provide theoretical and practical basis for ESs improvement and agricultural landscape sustainable planning in Beijing and other metropolitan areas.
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