| 韧性视角下基于XGBoost的三峡库区生态安全格局构建 |
| 摘要点击 324 全文点击 11 投稿时间：2025-08-18 修订日期：2025-11-06 |
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| 中文关键词 生态安全格局 生态韧性 XGBoost模型 电路理论 三峡库区 |
| 英文关键词 ecological security pattern ecological resilience XGBoost model circuit theory Three Gorges Reservoir Area |
| DOI 10.13227/j.hjkx.202508168 |
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| 中文摘要 |
| 生态安全格局构建对于实现生态风险主动防控与区域可持续发展意义重大. 以三峡库区为研究对象，基于生态韧性的空间分布，借助形态学空间格局分析（MSPA）和极端梯度提升（XGBoost）等模型，按照“生态源识别-阻力面建立-生态廊道及节点提取”的思路构建生态安全格局. 结果表明：①三峡库区的生态韧性整体呈现“东高西低”格局，共识别出26个库区生态源地，总面积为15 093.50 km2，占研究区的26.25%. 一级生态源地在库区东部和东北部呈聚集连片分布，二级生态源地主要遍布在库区东南部，三级生态源地在库区腹部呈离散碎片化分布. ②高生态阻力区域位于库区中北部和重庆主城区，低生态阻力区位于库首. 基于电路理论，提取49条生态廊道，贯穿连通库区腹部，呈网状布局. 其中重要生态廊道 30条，次重要生态廊道16条，一般生态廊道3条；识别生态夹点141个，主要集中在重庆东部，生态障碍点226个，分布在库区尾部和西腹部局部地区. ③库区呈现“一核两带四区多点”的生态安全格局，并根据不同的生态安全要素制定修复策略，可为三峡库区的生态安全保护提供科学依据和实践指导. |
| 英文摘要 |
| The construction of an ecological security pattern is of great significance for achieving regional sustainable development and proactive ecological risk prevention and control. This study takes the Three Gorges Reservoir Area as an example， based on the spatial distribution of ecological resilience， and utilizes models such as morphological spatial pattern analysis （MSPA） and extreme gradient boosting （XGBoost） to construct an ecological security pattern following the approach of “ecological source identification—resistance surface construction—extraction of ecological corridors and points.” The results indicated that the ecological resilience of the Three Gorges Reservoir Area exhibited an overall “east-high， west-low” pattern. A total of 26 ecological source areas were identified， covering a total area of 15 093.50 km2， accounting for 26.25% of the study area. Primary ecological source areas were concentrated and contiguously distributed in the eastern and northeastern parts of the reservoir area， secondary ecological source areas were primarily distributed in the southeastern part of the reservoir area， and tertiary ecological source areas were scattered and fragmented in the belly of the reservoir area. High ecological resistance zones were distributed in the central-northern part of the reservoir area and the main urban area of Chongqing， while low ecological resistance zones were distributed at the reservoir head. Based on circuit theory， 49 ecological corridors were identified， running through the belly of the reservoir area in a network layout. Among these， 30 were major ecological corridors， 16 were secondary ecological corridors， and 3 were general ecological corridors. A total of 141 ecological pinch points were identified， primarily concentrated in the eastern part of Chongqing， and 226 ecological barrier points were identified， distributed in the tail and parts of the western belly of the reservoir area. The final ecological security pattern presented was “one core， two belts， four zones， and multiple points，” and restoration strategies were designated based on different ecological safety elements， providing scientific basis and practical guidance for ecological safety protection in the Three Gorges Reservoir Area. |
