PROGRESS IN GEOGRAPHY ›› 2018, Vol. 37 ›› Issue (12): 1663-1671.doi: 10.18306/dlkxjz.2018.12.008

• Special Column: Guangdong-Hong Kong-Macao Greater Bay Area • Previous Articles     Next Articles

Improving urban ecological security pattern based on functional nodes-key corridors: A case study of Shenzhen City

Jiansheng WU1,2(), Hongkun MA1, Jian PENG2   

  1. 1. Key Laboratory for Urban Habitat Environmental Science and Technology, School of Urban Planning and Design, Peking University, Shenzhen 518055, Guangdong, China
    2. Key Laboratory for Earth Surface Processes, Ministry of Education, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
  • Received:2018-01-30 Revised:2018-07-26 Online:2018-12-28 Published:2018-12-28
  • Supported by:
    Key Project of National Natural Science Foundation of China, No.41330747


Improving urban ecological security pattern is an important measure to coordinate ecological protection and economic development and is of great significance for rational allocation of ecological resources and maximization of ecological effects. Taking Shenzhen City as the case study area, this study first identified the ecological function nodes, then the ecological function cost surface was generated according to the cost distance model and a shortest path network analysis was carried out. Finally, key patches and key ecological corridors were extracted. The results are as follows: (1) According to the calculated ecological resistance values of each landscape type, the resistance of forest is the smallest, and it is much smaller than the ecological resistance values of other landscape types. Therefore, forest is of great significance to the ecological security of the study area. (2) Ecological function cost gradient surface in Shenzhen City diverges around a key ecological function node, and the eastern region is lower than the western region. (3) The area and shape of the key patches are different, the large patches are mainly distributed in the eastern part, and the corresponding node levels are high. (4) Four key ecological corridors can be identified, and their locations are mostly within the basic ecological control line. But some parts of them do not fall within the basic ecological control line, therefore strict control is needed in these areas. (5) Core patches and key corridors are basically within the ecological control line, indicating that the ecological security of Shenzhen City is overall controllable. (6) Given that outer edges of some core patches and key corridors fall outside the ecological control line and are highly likely to withstand the risk of human interference, it is recommended that on the one hand, the scope of the ecological control line should be adjusted and the conflict parts should be included within the ecological control line. On the other hand, necessary supervision and protection should be carried out to prevent damage.

Key words: urban ecological security pattern, least-cost distance model, function network, key ecological corridor, Shenzhen