干旱区研究

Arid Zone Research >

2025 , Vol. 42 >Issue 6: 1103 - 1113

DOI: https://doi.org/10.13866/j.azr.2025.06.13

Ecology and Environment

Spatiotemporal evolution of the ecological security pattern in Longnan City based on the MSPA-InVEST model

  • LI Zhiming ,
  • ZHANG Guofei ,
  • XING Jie ,
  • YANG Lei ,
  • WANG Weidong ,
  • CAO Juan
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  • 1. Gansu Surveying and Mapping Engineering Institute, Lanzhou 730010, Gansu, China
    2. College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, Gansu, China
    3. Gansu Provincial Ecological Restoration Monitoring and Evaluation Technology Innovation Center, Lanzhou 730010, Gansu, China

Received date: 2024-07-14

  Revised date: 2025-03-25

  Online published: 2025-06-11

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Abstract

Accurate identification for ecological restoration is essential for promoting sustainable ecological development. Longnan City, as a crucial water source conservation area and ecological security barrier in the upper reaches of the Yangtze River, plays a critical role in maintaining the regional ecological balance. This study used the InVEST model to evaluate ecosystem services and combined the morphological spatial pattern analysis (MSPA) method with circuit theory to construct the ecological security pattern of Longnan City, then analyze its evolution. The results showed: (1) From 2000 to 2022, the number of ecological source areas increased, primarily distributed in the Kang County, Hui County, and Cheng County. The spatial distribution exhibited a pattern of higher density in the south and lower in the north. (2) The average resistance value first decreased then increased, while the length of ecological corridors initially increased and later decreased, during the study period with a net reduction of approximately 508.94 km. Spatially, the corridors shifted from central to southeastern regions. (3) Ecological bottleneck areas, primarily dominated by forests, croplands, and grasslands, were concentrated in low-resistance zones. Their total area decreased annually, with a net reduction of about 144.84 km2 over the study period. Ecological obstacles also decreased in both number and area, mainly clustered in Wudu County, Li County, and Tanchang District. Thus, the research results provide a scientific foundation for the formulation of ecological restoration plans and promotion of high-quality regional economic development in Longnan City. The findings provide scientific support for formulating ecological restoration plans and promoting high-quality economic development in Longnan City.

Key words： ecosystem service; ecological security pattern; InVEST model; MSPA method; Longnan City

Cite this article

LI Zhiming , ZHANG Guofei , XING Jie , YANG Lei , WANG Weidong , CAO Juan . Spatiotemporal evolution of the ecological security pattern in Longnan City based on the MSPA-InVEST model[J]. Arid Zone Research, 2025 , 42(6) : 1103 -1113 . DOI: 10.13866/j.azr.2025.06.13

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