Acta Geographica Sinica ›› 2019, Vol. 74 ›› Issue (7): 1409-1419.doi: 10.11821/dlxb201907010

• Ecosystem • Previous Articles     Next Articles

Stability identification and reconstruction strategy of ecological space network at the county scale: A case study of Chaling County, Hunan Province

FU Lihua,MO Zhenchun,PENG Yaohui,XIE Mei,GAO Xingyan   

  1. College of Business, Hunan University of Technology, Zhuzhou 412007, Hunan, China
  • Received:2018-09-05 Revised:2019-04-26 Online:2019-07-25 Published:2019-07-23
  • Supported by:
    National Social Science Fund of China(18BGL179)


County is the basic unit of land space planning and management research. The identification and reconstruction of county ecological space network, an important way of space optimization, plays a positive role in the demarcation of ecological protection red line. However, the methodology of spatial network analysis is stagnant. Based on the construction and identification of the ecological space network in typical hilly areas and counties, this study expresses the characteristics of change brought about by specific disturbance with robustness analysis method, analyzes node importance degree, and evaluates network stability. The results show that nodes with high importance play a key role in maintaining the stability of ecological space network. The number of such nodes accounts for about 5% and most of them are located in the area of Luoxiao Mountain in Chaling county, and corresponding with woodland, water and grassland, garden and other ecological land landscape. The change value of the stability of the ecological space network is highly consistent with the number of nodes. When the failure rate of the network node is higher than 92%, it will be completely paralyzed; when the failure rate is lower than 20%, the stability can be restored. The change of connectivity robustness is more sensitive in the scenario of sabotage which is dominated by interference of human activities. Based on the distribution of important nodes and the judgment results of stability, combined with the red line demarcation scheme of ecological protection, this paper puts forward suggestions on the differentiated management of regional ecological protection and the reconstruction of ecological space network. The study not only provides effective support for county ecological space planning and ecological protection red line control, but also provides case reference for similar regional ecological space network research.

Key words: ecological space, robustness, node importance, space reconstruction, county scale