| 长江流域城市蔓延与生态系统服务流解耦类型识别及提升路径 |
| 摘要点击 458 全文点击 8 投稿时间：2025-07-15 修订日期：2025-09-28 |
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| 中文关键词 长江流域 城市蔓延 生态系统服务流 解耦 地理探测器 地理加权回归 |
| 英文关键词 Yangtze River Basin urban sprawl ecosystem service flows decoupling Geodetector geographically weighted regression |
| DOI 10.13227/j.hjkx.202507210 |
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| 中文摘要 |
| 城市的无序扩张会导致生态系统服务流的空间传递路径被切断，不仅阻碍城市的可持续发展，还会对自然生态系统造成严重破坏. 基于弹性系数解耦模型，从结构维、密度维、品质维、效率维和形态维这5个维度，结合淡水供给、景观美学、粮食生产、气候调节、水源涵养和碳固持这6种生态系统服务流，构建解耦测度模型，对长江流域城市蔓延与生态系统服务流的解耦特征进行识别. 运用地理探测器和地理加权回归模型分析驱动因素，提出长江流域城市蔓延与生态系统服务流可持续发展提升路径. 结果表明：①2010~2020年长江流域城市蔓延在结构维、品质维、效率维和形态维这4个维度上城市蔓延程度随时间增强，在密度维城市蔓延程度随时间减弱. 2010~2020年长江流域6种生态系统服务流的流动强度随时间下降或受阻. ②2010~2020年长江流域城市蔓延与生态系统服务流的解耦结果以强负解耦和扩张性负解耦为主，地级市占比分别为44%和31%. ③品质维和效率维对生态系统服务流的交互作用最强，其余因子间交互作用的解释力也均在30%以上. 第二产业占比和建成区紧凑度是解耦程度的主要指标因子，并且各因子对解耦程度的影响在空间上表现出一定的异质性. 需要对不同解耦类型提出针对性的优化策略，促进长江流域城市与生态系统服务流的可持续发展. |
| 英文摘要 |
| The disorderly sprawl of cities leads to the spatial transmission path of ecosystem service flows being cut off， which not only hinders the sustainable development of cities but also causes serious damage to natural ecosystems. Based on the decoupling model of the elastic coefficient， a decoupling measurement model was constructed from five dimensions， namely structural dimension， density dimension， quality dimension， efficiency dimension， and morphological dimension， combined with six ecosystem service flows， namely freshwater supply， landscape aesthetics， food production， climate regulation， water conservation， and carbon sequestration， to identify the decoupling characteristics of urban sprawl and ecosystem service flow in the Yangtze River Basin. Geodetectors and geographically weighted regression models were used to analyze the driving factors， and the sustainable development path of urban sprawl and ecosystem service flow in the Yangtze River Basin was proposed. The results show that： ① From 2010 to 2020， the degree of urban sprawl in the Yangtze River Basin increased with time in the four dimensions of structure， quality， efficiency， and form and decreased with time in the density dimension. From 2010 to 2020， the flow intensity of six ecosystem service flows in the Yangtze River Basin decreased or was blocked with time. ② From 2010 to 2020， the decoupling results of urban sprawl and ecosystem service flow in the Yangtze River Basin were mainly strong negative decoupling and expansive negative decoupling， accounting for 44% and 31% of prefecture-level cities， respectively. ③ The interaction between the quality and efficiency dimensions on ecosystem service flow was the strongest， and the explanatory power of the interaction between the other factors was also more than 30%. It is necessary to propose targeted optimization strategies for different decoupling types to promote the sustainable development of urban and ecosystem service flows in the Yangtze River Basin. |
