基于电路理论的哈长城市群生态网络构建

Construction of ecological network of Harbin-Changchun urban agglomeration based on circuit theory

城市群是城市化活动集中的区域,受人类活动影响显著,其生态系统的完整性和连通性受到损害,生态网络构建是应对城市化造成的生态环境影响的有效措施。以哈长城市群为例,基于Linkage Mapper识别生态廊道和关键生态节点,构建了哈长城市群的生态网络。结果表明:哈长城市群主要生态源地有37处,总面积为220174.85 km^(2),土地利用类型以林地、草地及湿地为主;识别得到生态廊道86条,全长55353.09 km;生态夹点153处,面积1723.49 km^(2);生态障碍点372处,面积8660.56 km^(2),研究能够为哈长城市群土地利用规划和管理提供决策支持。

Urban agglomerations are concentrated areas of urbanization activities,which are significantly affected by human activities and the integrity and connectivity of their ecosystems are compromised.Construction of ecological network is an effective measure to cope with the ecological impacts caused by urbanization.Taking the Harbin-Changchun urban agglomeration as an example,the identified ecological corridors and key ecological nodes based on Linkage Mapper,and constructed an ecological network in the Harbin-Changchun urban agglomeration.The results show that there were 37 major ecological source sites in Harbin-Changchun urban agglomeration with a total area of 220,174.85 km^(2).The land use types were mainly forest land,grassland and wetland;86 ecological corridors with a total length of 55353.09 km were identified;153 ecological pinch points were identified,with an area of 1723.49 km^(2);372 ecological obstacles were identified,covering an area of 8660.56 km^(2).This study can provide decision support for Harbin-Changchun urban agglomeration.