| 基于Zonation-MSPA耦合模型的甘肃沿黄地区生态安全格局构建与评估 |
| 摘要点击 193 全文点击 14 投稿时间：2024-05-08 修订日期：2024-07-03 |
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| 中文关键词 国土空间生态修复 生态安全格局 Zonation模型 MSPA模型 电路理论 图论法 |
| 英文关键词 ecological restoration of land and space ecological security pattern Zonation model MSPA model circuit theory graph theory method |
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| 中文摘要 |
| 为了有效实现国土空间生态保护与修复,探讨国土空间生态安全格局构建与评估的方法,提出针对性修复策略,对维护国家生态安全具有重要意义.以甘肃沿黄地区为例,基于生态系统服务重要性和生态敏感性,耦合Zonation-MSPA模型识别生态源地,利用电路理论提取生态廊道、生态夹点和生态屏障点,构建生态安全格局并采用图论法评估生态安全格局,识别和确定研究区域的国土空间生态保护修复关键区域.结果表明：①甘肃沿黄地区共提取到生态源地60个,生态廊道共112条,其中关键生态廊道43条；②甘肃沿黄地区生态安全格局大体表现为“三纵-四横-三区”的空间特征,形成的网络回路和连通度都处于中等水平；③识别出的甘肃沿黄地区生态保护修复关键区域包括：生态夹点126个,主要集中分布在陇中地区,现状用地主要为耕地和草地,生态夹点周边区域的现状用地大多为建设用地；生态障碍点共475个,其中一级障碍点106个,二级障碍点369个,现状用地主要为耕地、草地及河道.结合研究区生态保护修复关键区域的空间分布特征以及待修复的现状地类,分别提出各类生态保护修复关键区域的修复措施,可为黄河流域生态安全格局优化及生态修复提供借鉴. |
| 英文摘要 |
| To effectively realize the ecological protection and restoration of the national land space, exploring the construction of the ecological security pattern of the national land space and the identification of key areas for ecological protection and restoration and proposing targeted restoration strategies to maintain the national ecological security are important. In this study, based on the importance of ecosystem services and ecological sensitivity, the coupled Zonation-MSPA model is used to identify ecological sources, and the circuit theory is used to extract ecological corridors, ecological pinch points, and ecological barriers； to construct an ecological security pattern and evaluate the ecological security pattern by using the graph theoretic method； and to identify and determine the ecological protection and restoration key areas of the national land space in the study area. The study revealed that： ① There were 60 ecological source sites and 112 ecological corridors in Gansu along the Yellow River, including 43 key ecological corridors. ② The ecological security pattern of Gansu along the Yellow River was generally characterized by the spatial feature of “four verticals, four horizontals, and three zones,” and the network circuits and connectivity were at a medium level. The key areas for ecological protection and restoration in Gansu along the Yellow River were identified as follows： 126 ecological pinch points, mainly distributed in the Longzhong area, with the current land mainly consisting of arable land and grassland and most of the current land around the ecological pinch points consisting of construction land. There were 475 ecological obstacle sites, including 106 primary obstacle sites and 369 secondary obstacle sites, and the current land was mainly cropland, grassland, and river. Combined with the spatial distribution characteristics of the key areas for ecological protection and restoration in the study area and the current land types to be restored, the restoration measures for each type of key areas for ecological protection and restoration are proposed, which will provide reference for the optimization of the ecological security pattern and ecological restoration in the Yellow River Basin. |
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