JOURNAL OF NATURAL RESOURCES ›› 2021, Vol. 36 ›› Issue (9): 2294-2307.doi: 10.31497/zrzyxb.20210909

• Construction of the Territorial Space Security Planning System • Previous Articles     Next Articles

Determining priority areas for land ecological restoration based on ecological network-human disturbance: A case study of Changsha-Zhuzhou-Xiangtan Urban Agglomeration

JIAO Sheng1(), LIU Yi-cun1, HAN Zong-wei1,2, ZHOU Ke-jing1, HU Liang3, LIU Tie-xiong4   

  1. 1. School of Architecture, Hunan University, Changsha 410082, China
    2. Department of Tourism and Geography, Tongren University, Tongren 554300, Guizhou, China
    3. Changsha Planning & Design Survey Research Institute, Changsha 410007, China
    4. Huadong Engineering Corporation Limited, Hangzhou 412300, China
  • Received:2020-10-08 Revised:2021-03-29 Online:2021-09-28 Published:2021-09-15

Abstract:

In the process of rapid industrialization and urbanization, the interference effect of human activities on the structure and function of ecosystem has been increasingly intensified. Land ecological restoration has become an essential topic of ecological civilization construction and land spatial planning. Determining priority areas for ecological restoration based on holistic protection and systematic governance, is a critical method for the scientific and orderly promotion of land ecological restoration. Taking Changsha-Zhuzhou-Xiangtan Urban Agglomeration as an example, we used human footprint to evaluate the intensity of human disturbance to the ecosystem quantitatively. On this basis, through the minimum cumulative resistance model, circuit theory, and cyclic window search method, the ecological network was identified, and the key areas where human disturbance caused damage to its structure and function were determined as priority areas for ecological restoration. The research showed that: (1) The human disturbance in the urban agglomeration presented a core-edge decreasing circle distribution, and the west was higher than the east while the north was higher than the south. In the study area, low disturbance area, medium-low disturbance area, medium-high disturbance area, and high disturbance area accounted for 12.66%, 32.31%, 37.70%, and 17.33% of the urban agglomeration land, respectively. (2) The ecological network was identified, which contained 140 ecological source patches and 307 potential ecological corridors between them. The corridors were 3986.02 km long, primarily distributed along with the Xiangjiang River system or located in the low hilly area with good vegetation coverage. (3) The priority areas for ecological restoration were determined, including a total of 867.17 km2 for source restoration, 97.83 km for corridor restoration, and 40 points for pinch point restoration. From the perspective of Point-Line-Polygon, restoration strategies were proposed to eliminate or weaken human disturbance, which would help to provide spatial guidance for formulating and implementing of land ecological restoration in the New Era.

Key words: land ecological restoration, determination of priority areas, ecological network, human disturbance, Changsha-Zhuzhou-Xiangtan Urban Agglomeration