干旱区研究

干旱区研究 ›› 2025, Vol. 42 ›› Issue (6): 1103-1113.doi: 10.13866/j.azr.2025.06.13 cstr: 32277.14.AZR.20250613

• 生态与环境 • 上一篇    下一篇

基于MSPA-InVEST模型的陇南市生态安全格局时空演变

李治明1(), 张国飞2(), 邢捷1, 杨磊1,3, 王卫东1,3, 曹娟1,3   

  1. 1.甘肃省测绘工程院，甘肃 兰州 730010
    2.兰州大学资源环境学院，甘肃 兰州 730000
    3.甘肃省生态修复监测评价技术创新中心，甘肃 兰州 730010
  • 收稿日期:2024-07-14 修回日期:2025-03-25 出版日期:2025-06-15 发布日期:2025-06-11
  • 通讯作者: 张国飞. E-mail: zhangguofei@lzu.edu.cn
  • 作者简介:李治明（1987-），高级工程师，主要从事生态修复工程监测及效果评价. E-mail: lzhm216@163.com
  • 基金资助:
    甘肃省自然资源厅科技创新项目(202415);甘肃省科技计划项目重点研发计划项目(22YF7FA074);甘肃省科技计划项目重点研发计划项目(25YFFA001);甘肃省自然资源厅重点人才项目(202304)

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

LI Zhiming1(), ZHANG Guofei2(), XING Jie1, YANG Lei1,3, WANG Weidong1,3, CAO Juan1,3   

  1. 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:2024-07-14 Revised:2025-03-25 Published:2025-06-15 Online:2025-06-11

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摘要：

构建生态安全格局，精准识别生态修复关键区域，是推进国土空间生态修复的前提和保障。陇南市作为国家重点水源涵养区和长江上游生态安全屏障，其生态安全至关重要。本研究采用InVEST模型评估生态系统服务功能，结合形态学空间格局分析（MSPA）方法和电路理论构建陇南市生态安全格局并分析其演变规律。 结果表明：（1） 2000—2022年生态源地面积增加，其中康县、徽县和成县增加显著，呈现出南多北少的空间分布格局。（2） 平均阻力值呈先下降后上升的变化趋势，生态廊道长度呈先增加后减小，研究期内生态廊道净减少长度约508.94 km，空间上由中部向东南部移动的趋势。（3） 生态夹点主要位于阻力低值区域，以林地、耕地和草地为主，面积逐年减少，同期净减少面积约144.84 km2；生态障碍点数量和面积均有所减少，集中在武都区、礼县和宕昌县。研究结果可以为制定陇南市生态修复规划和区域经济高质量发展提供科学依据。

关键词: 生态系统服务, 生态安全格局, InVEST模型, MSPA方法, 陇南市

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