喀斯特山地城市“三生”空间格局演化及碳代谢研究——以贵阳市为例

Spatial Pattern Evolution and Carbon Metabolism of"Production-Living-Ecological"Space in Karst Mountain Cities——Taking Guiyang City as an Example

以贵阳市为例探索喀斯特山地城市“三生”空间格局演变与城市碳代谢之间的耦合关系,有助于“三生”空间资源协同优化,为未来低碳城市规划提供参考。通过构建“三生”空间及碳源(汇)属性分类体系,利用转移矩阵分析贵阳市2010-2020年“三生”空间格局演化特征,并运用碳流模型和生态网络分析方法探讨“三生”空间演化的碳代谢过程及其生态关系。结果表明:①2010-2020年,贵阳市“三生”空间格局变化显著,工业生产空间、城镇生活空间呈持续增长态势,农村生活空间呈现先增后减的态势,其余空间用地则呈现减少态势;②贵阳市垂直方向碳通量和水平方向净碳流值均为负,“三生”空间格局演化造成了碳排放量增加,碳收支存在明显不平衡现象;③整个研究期间掠夺限制关系始终占据主导地位,互惠共生关系也明显增加,随着“三生”空间格局演化程度愈发剧烈,竞争关系也随之出现。贵阳市“三生”空间格局演化对促进彼此绿色发展生态关系具有积极影响,但同时也存在问题,需进一步打造低碳城镇化建设布局,促进绿色发展。

Taking Guiyang City as an example,the paper explores the coupling relationship between the spatial pattern evolution of"production-living-ecological"space and urban carbon metabolism in karst mountain cities,which is helpful for the collaborative optimization of"production-living-ecological"space resources and provides theoretical support for future low-carbon urban planning.By constructing a classification system of"production-living-ecological"space and carbon source(sink)attributes,this paper analyzes the evolution characteristics of the spatial pattern of"production-living-ecological"space in Guiyang City from 2010 to 2020 by using the transfer matrix,and explores the carbon metabolism process and its ecological relationship of the spatial evolution of"production-living-ecological"space by using the carbon flow model and ecological network analysis method.The results suggested that:①"production-living-ecological"space in Guiyang has changed significantly during 2010-2020,with industrial production space and urban living space showing a continuous growth trend,rural living space showing a trend of first increasing and then decreasing,and the rest of the spatial land showing a decreasing trend.②The vertical carbon flux and horizontal net carbon flow in Guiyang are both negative,and the spatial pattern evolution of"production-living-ecological"space has led to an increase in carbon emissions,and there is an obvious imbalance in the carbon budget.③During the whole study period,the predatory restriction relationship was always dominant.The reciprocal symbiotic relationship increased significantly,and the competitive relationship also appeared with the more and more intense evolution of the spatial pattern of"production-living-ecological"space.The evolution of the spatial pattern of"production-living-ecological"space in Guiyang has a positive impact on promoting the ecological relationship between green development.At the same time,there is obvious disharmony,and it is necessary to further build a low-carbon urbanization construction layout to promote green development.