京津冀结合部城市扩展与生态位的空间耦合关系变化分析

Analysis of Spatial Coupling between Urban Expansion and Niche Change in the Beijing-Tianjin-Hebei Joint Region

探索城市扩展与生态位的空间变化关系有助于促进城镇化背景下区域的协调可持续发展。该文基于城市扩展研究现状及城市生态位理论研究方法,以京津冀结合部地区为例,提取土地利用空间信息以探索2005-2015年间城市扩展特征,建立城市生态位评价指标体系并判断城市生态位变化规律,结合耦合协调度模型定量研究两者关系,并利用空间自相关方法检验耦合协调度的空间格局特征。研究表明,2005-2015年,京津冀结合部城市建成区范围持续向外扩展且扩展形态呈离散特征;区域整体经济、社会与环境生态位宽度变化不一,且各区县发展差异明显;城市扩展与生态位变化的耦合协调发展状况总体上得到改善,但协调发展类型仍以失调衰退向协调发展过渡为主;应对京津冀结合部各县区发展进行精准定位,在释放潜能的同时加强区域联动。

Exploring the spatial relationship between urban expansion and the change of niche helps to promote harmonious and sustainable regional development under the background of urbanization.Based on the current state of urban expansion research and research methods of urban niche theory,we have taken the urban agglomerations of Beijing-Tianjin-Hebei Joint Region as an example to explore the characteristics of urban expansion and the rules for urban niche change from 2005 to 2015.Besides,the coupling coordination degree model was applied to quantitatively analyze the relationship between the above two,and the spatial pattern characteristics of the coupling coordination degree was tested through using the method of spatial autocorrelation.This research indicated that urban built-up areas continued to expand,and the expansion pattern was discrete in the Beijing-Tianjin-Hebei Joint Region from 2005 to 2015.Meanwhile,the comprehensive niche breadth of the city was in decline,and regional development disparities were obvious between districts and counties.Overall speaking,coupling and coordinating development of urban expansion and niche change improved,but the types of coordinated development were still dominated by severe imbalance,intermediate coordinating recession and primary coordination.To promote development of the Beijing-Tianjin-Hebei Joint Region,regional linkage should be strengthened based on optimization and upgrading of the industrial structure.