Zhong Qikang, Liu Yuxin, Li Zhe, Zhu Jiawei
School of Architecture and Art, Central South University, Changsha 410083, China.
School of Economics and Management, Tongji University, Shanghai 200092, China.
iScience. 2025 Jul 25;28(9):113209. doi: 10.1016/j.isci.2025.113209. eCollection 2025 Sep 19.
Rapid urbanization alters land use patterns and, in turn, regional carbon metabolism. Focusing on Hunan Province, China (2000-2020), we combined high-resolution land-use inventories with ecological network analysis to quantify carbon emissions, carbon sequestration, and the interactions among major land categories. Emissions rose markedly over two decades, driven mainly by expanding transportation and industrial zones. Forests and open woodlands remained the chief sinks, yet showed a declining sequestration capacity. Spatial mapping revealed persistent emission hotspots on urban fringes and within industrial parks, whereas high-sequestration areas clustered in protected forests. Network analysis identified competition, exploitation-control, and mutualistic linkages among land types, highlighting the ecological interdependencies that shape regional carbon flows. These findings clarify how specific land transitions amplify or mitigate carbon imbalance and provide actionable guidance for land-use planning aimed at strengthening ecosystem service capacity and supporting long-term carbon-neutral development.
快速城市化改变了土地利用模式，进而改变了区域碳代谢。以中国湖南省（2000 - 2020年）为研究对象，我们将高分辨率土地利用清单与生态网络分析相结合，以量化碳排放、碳固存以及主要土地类别之间的相互作用。二十年间排放量显著上升，主要受交通和工业区扩张的推动。森林和开阔林地仍然是主要的碳汇，但固存能力呈下降趋势。空间制图显示城市边缘和工业园区存在持续的排放热点，而高固存区域集中在受保护森林中。网络分析确定了土地类型之间的竞争、开发 - 控制和互利联系，突出了塑造区域碳流的生态相互依存关系。这些发现阐明了特定土地转变如何加剧或缓解碳失衡，并为旨在加强生态系统服务能力和支持长期碳中和发展的土地利用规划提供了可操作的指导。
