Construction and optimization of ecological networks based on future scenario simulation in Qianshan City, Anhui Province

Ying Yong Sheng Tai Xue Bao. 2023 Jun;34(6):1474-1482. doi: 10.13287/j.1001-9332.202306.026.

Abstract

The rapid urbanization adversely affects landscape pattern of mountainous cities. It is of great practical significance to explore the spatial and temporal evolution of ecological networks in mountainous areas to achieve regional ecological security. Taking Qianshan City in Anhui Province as an example, based on the land use data in 2012 and 2020, we simulated the land use situation in 2036 with PLUS model, and constructed the ecological networks in 2020 and 2036, respectively. We further analyzed its spatial and temporal evolution characteristics and explored the optimization path of ecological network. The results showed that the scale of various land use types in Qianshan City would change little from 2020 to 2036. The construction land would be centered on the built-up area, expanding in a point and block shape to the surrounding area. The ecological space would be continuously squeezed and encroached. The overall complexity and connectivity of ecological networks in Qianshan City would increase. The number and area of ecological source sites would increase, expanding spatially to the southwest and northeast. The overall density and number of ecological corridors would increase, with a lack of ecological corridor connections in the east-west direction, which need urgent improvement. The stability of ecological networks could be improved through three major measures, including protection and restoration of source sites, optimization and cultivation of corridors, and zoning control.

城市快速发展对多山型城市景观格局产生不利影响,探究山区生态网络时空演变,对实现区域生态安全极具现实意义。以潜山市为例,基于2012、2020年土地利用数据,以PLUS模型模拟2036年用地情况,并分别构建2020和2036年生态网络,进而分析其时空演变特征,探讨生态网络的优化路径。结果表明:2020—2036年,潜山市各类用地规模变化较小,建设用地以已建区为中心,呈点状和块状向四周扩张,生态空间不断被挤压、蚕食。潜山市生态网络整体复杂程度和连通性提高;生态源地数量和面积增加,空间上向西南、东北方向扩张;生态廊道总体密度和数量上升,但东西向仍缺乏生态廊道连接,亟须改善。可通过保护修复源地、优化培育廊道、分区管控三大措施提升生态网络稳定性。.

Keywords: PLUS model; ecological corridor; ecological network; land use.

MeSH terms

  • Cities
  • City Planning*
  • Computer Simulation
  • Urbanization*