| 基于生态系统服务的长株潭城市群“三区空间”格局演化的生态效应及其影响因素 |
| 摘要点击 254 全文点击 3 投稿时间：2025-08-14 修订日期：2025-11-05 |
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| 中文关键词 生态系统服务（ESs） “三区空间” 时空演化 随机森林（RF） 长株潭城市群 |
| 英文关键词 ecosystem services（ESs） “three zones space” spatiotemporal evolution random forest（RF） Chang-Zhu-Tan urban agglomeration |
| DOI 10.13227/j.hjkx.202508136 |
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| 中文摘要 |
| 长株潭城市群是中部地区高质量发展的核心增长极，明晰该区“三区”空间演化与生态服务功能的关系及其驱动因素，对区域国土空间优化和生态保护具有重要意义. 运用土地利用转移矩阵和InVEST模型，分析2000~2020年长株潭城市群6类生态服务时空特征，计算综合生态服务指数与“三区空间”转型生态贡献率，并利用随机森林模型探究驱动机制. 结果表明：①20 a间，长株潭城市群城镇空间持续扩张，农业与生态空间缩减，3类空间总交叉转换面积达2 504.29 km2，以农业与生态空间互转为主，向城镇空间转换次之，城镇空间向农业空间和生态空间转换最少. ②生态系统服务功能总体恶化，综合生态系统服务指数下降0.011，生境质量、粮食供给、碳固存和休闲娱乐这4项功能下降，土壤保持与水质净化功能提升，农业空间和生态空间向城镇空间转换是主因. ③生态系统服务功能受自然地理、社会经济和交通区位共同影响，夜间灯光指数、地形起伏度等因子起主导作用，变量间呈非线性相关. 研究可为长株潭城市群国土资源利用和生态保护提供决策依据. |
| 英文摘要 |
| The Chang-Zhu-Tan urban agglomeration is a core growth pole for high-quality development in central China. Clarifying the relationship between the spatial evolution of the “three zones” （urban， agricultural， and ecological spaces） and ecological service functions， as well as their driving factors， is of great significance for optimizing regional territorial space and ecological protection. This study analyzed the spatiotemporal characteristics of six types of ecological services in the Chang-Zhu-Tan urban agglomeration from 2000 to 2020 using land use transfer matrices and the InVEST model， calculated the comprehensive ecological service index and the ecological contribution rate of spatial transformation in the “three zones space”， and explored the driving mechanisms using the random forest model. The results showed that： ① Over the 20 years， urban space in the Chang-Zhu-Tan urban agglomeration continued to expand， while agricultural and ecological spaces shrank. The total cross-conversion area of the three types of spaces reached 2 504.29 km2， mainly characterized by mutual conversion between agricultural and ecological spaces， followed by conversion to urban space， and the least conversion from urban space to agricultural and ecological spaces. ② The overall ecosystem service functions deteriorated， with the comprehensive ecosystem service index decreasing by 0.011. Four functions， including habitat quality， food supply， carbon sequestration， and recreational services， declined， while soil conservation and water purification functions improved. The conversion of agricultural and ecological spaces to urban space was the main cause. ③ Ecosystem service functions were jointly affected by natural geography， social economy， and transportation location. Factors such as night-time light index and topographic relief played a leading role， and there was a non-linear correlation between variables. This study can provide a decision-making basis for land resource utilization and ecological protection in the Chang-Zhu-Tan urban agglomeration. |
