Spatial-temporal Evolution of Ecological Security in Beijing based on Emergetic Ecological Footprint

Abstract

With high population density and intensive energy consumption, Beijing has long been facing the huge challenge of ecological security in context of coordinated development of environment and economy. Combining statistical and grid data, this paper analyzed the ecological security status in Beijing from three scales, i.e., city, sub-city and grid, based on an emergetic ecological footprint model. The emergetic ecological footprint (EEF), emergetic ecological carrying capacity (EEC), emergetic ecological deficit (EED) and emergetic ecological pressure index (EEPI) were used to evaluate the ecological security status of Beijing from different scales. Results show that Beijing has been in the state of ecological deficit from 2005 to 2017, and the multi-year average value of ecological pressure is 9.18 with great differences in the spatial distribution of ecological security. Concrete measures are then suggested to promote the ecological security of Beijing.