Abstract
The ecological security (ES) of urban agglomeration and surrounding environmental system is related to the sustainable development of cities, which is a hot spot that we must pay attention to. In this study, four subsystems composed of natural base, landscape structure, ecosystem stability, and anthropogenic interference were used to evaluate the comprehensive ecological security (CES) of Guangdong-Hong Kong-Macao Greater Bay Area (GHMGBA) in 2000, 2010 and 2020. The results show that CES of the region was generally well. The central urban region of GHMGBA was unsafety with an area proportion of about 24.5%, the periphery was safety with an area proportion of about 43.5%, and the others are transitional zone. From 2000 to 2020, the CES change first slightly decreases and then relatively stable, and the transfer of different safety levels mainly occurs in the transitional zone. In 2010-2020 the transfer of different levels of CES is more frequent than in 2000-2010, indicating that the spatial-temporal pattern of CES fluctuated sharply during 2010-2020. The urban-rural gradient showed that with the increase of distance, CES fluctuations increase, but decreases at about 20-40km, 60-80km and 120-140km away from the city center, which may be sub-urban regions. The overall CES change range gradually decreases with increasing distance from urban centers. This study helps to understand the temporal and spatial distribution of ecological environment and urban-rural gradient in typical urban regions, and provides a reference for the collaborative planning of urban agglomeration.
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Acknowledgements
This work was supported by the Science and Technology Project of Jiangxi Provincial Department of Education (No. GJJ201419), the Humanities and Social Science Research Planning Project for Universities of Jiangxi Province (No. GL20116), the University Students Innovation Practice Training Program of The Chinese Academy of Sciences, the Climbing Program Special Funds for Science and Technology Innovation Strategy of Guangdong Province (No. pdjh2020b0169), and the Challenge Cup Gold Seed Project of South China Normal University (No. 20DKKA01). The authors thank editor and anonymous reviewers for their constructive comments, suggestions, and help in enhancing the manuscript.
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Xiaojun Wang: Data curation, Resources, Conceptualization, Methodology, Software, Writing-original draft preparation, Writing-review and editing; Guangxu Liu: Conceptualization, Methodology, Writing-review and editing, Supervision, Funding; Churan Zhang, and Yiling Liao: Data curation, Methodology, Software, Drawing, Writing-original draft preparation. All authors have read and agreed to the published version of the manuscript.
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Wang, X., Liu, G., Zhang, C. et al. Spatial-temporal pattern and urban-rural gradient of comprehensive ecological security in urban agglomeration in South China from 2000 to 2020. Environ Sci Pollut Res 30, 102474–102489 (2023). https://doi.org/10.1007/s11356-023-29460-2
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DOI: https://doi.org/10.1007/s11356-023-29460-2