SCIENTIA GEOGRAPHICA SINICA ›› 2022, Vol. 42 ›› Issue (11): 1923-1931.doi: 10.13249/j.cnki.sgs.2022.11.007

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Ecological Security Assessment and Spatio-temporal Transition Characteristics in the Yangtze River Delta Urban Agglomeration

Zhang Zhonghao1,2(), Nie Tiantian1, Gao Yang3,4(), Tan Shenghui1, Gao Jun1,2   

  1. 1. College of Environmental and Geographical Sciences, Shanghai Normal University, Shanghai 200234, China
    2. Yangtze River Delta Urban Wetland Ecosystem National Field Scientific Observation and Research Station, Shanghai 200234, China
    3. College of Land Science and Technology, China Agricultural University, Beijing 100193, China
    4. National Natural Science Foundation of China, Beijing 100085, China
  • Received:2022-02-13 Revised:2022-05-10 Online:2022-11-30 Published:2022-11-20
  • Contact: Gao Yang;


The PSR model, catastrophe progression method and exploratory spatial temporal data analysis are used to quantitatively characterize the spatial pattern of ecological security levels of 26 cities in the Yangtze River Delta urban agglomeration. This article has concluded three findings as follows. Firstly, the ecological security levels of the cities in the Yangtze River Delta urban agglomeration has increased from 2005 to 2015, but most cities are in the relatively unsafe and relatively safe level, and the overall ecological security level is not in the high level. Secondly, the spatial structure stability of urban ecological security level in the central and southeastern regions of the Yangtze River Delta urban agglomeration is better; Nantong has the greatest spatial dependence, while Shanghai has minimal spatial dependence; The analysis of the moving direction of LISA time path shows that the Yangtze River Delta urban agglomeration has strong spatial integration in the ecological security evolution. Thirdly, the spatial cohesion of Moran’s Ι is $ {K}_{t} $=0.698, that means the probability of no type transition is 69.8%, which indicates that there is a certain pattern change in the ecological security level of cities in the Yangtze River Delta urban agglomeration, but it is not easy for their relative position to change. This study discusses the coordinated growth mechanism of regional ecological security, which can provide a theoretical basis for the diagnosis and regulation of ecological security problems of urban agglomerations in the Yangtze River Delta urban agglomeration. Moreover, it also provides relevant reference for the sustainable development of other urban agglomerations.

Key words: catastrophe progression method, exploratory spatial temporal data analysis, ecological security, the Yangtze River Delta urban agglomeration

CLC Number: 

  • X826