Spatial-temporal change of ecosystem health across China: Urbanization impact perspective

Authors: Yingying XU*, Peking University, Qiao HUANG, Peking University
Topics: Geography and Urban Health
Keywords: Ecosystem health, Urbanization, Correlation analysis, Correlation threshold, China
Session Type: Paper
Day: 4/5/2019
Start / End Time: 8:00 AM / 9:40 AM
Room: Roosevelt 6, Marriott, Exhibition Level
Presentation File: No File Uploaded


Rapid urbanization have incurred a series of ecological and environmental problems such as urban diseases. Exploring the relationship between ecosystem health and urbanization is the foundation for solving the problems of urban ecosystems. Such exploration has both theoretical and practical significance. This paper investigate the relationship between ecosystem health and urbanization in case of 260 cities in China for the period of 2001, 2005 and 2010. Firstly it constructed an evaluation system for ecosystem health based on four aspects: ecosystem vigor, organization, resilience and ecosystem services, and used this evaluation system to assess the ecosystem health of the 260 cities. Next, it measured the urbanization of the 260 cities and divided cities into three urbanization categories (population, economic and space urbanization) then explored the spatiotemporal dynamics and relationship of ecosystem health and urbanization on both national and regional scales by conducting correlation analysis. Finally, based on the piecewise linear regression method, the thresholds of ecosystem health response to different urbanization were discriminated. The results show that: The average physical ecosystem health in China (0.60-0.70) is much higher than the average health average (0.20-0.30); There are significant negative correlations (P < 0.05) between different urbanization and ecosystem health on national scale (space urbanization > economic urbanization > population urbanization), and interpretive degree of spatial urbanization is high on ecosystem health; there were regional differences and periodic characteristics in the correlations between ecosystem health and urbanization on both national and regional scales, thresholds existed although the meaning of these thresholds differs.

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