Ecological Network Constructionat Water Network Area Based on MSPA and Circuit Theory
Under the background of rapid urbanization,urban sprawling leads to increasingly fragmented and isolated regional habitat patches.Science-based construction of ecological networks is an important means to effectively connect habitat patches,which has a key significance to ensure the connectivity and stability of regional ecosystems.Taking Wujiang District of Suzhou City as an example,the paper uses MSPA and landscape connectivity evaluation to identify the ecological source area,and the comprehensive resistance surface is constructed based on MCR model superposition of multiple factors.Ecological corridors and nodes are extracted based on circuit theory,and ecological network is constructed for Wujiang District according to the pattern of"ecological source area identification-comprehensive resistance surface construction-ecological corridor extraction-ecological node selection".The results show that a total of 30 important and general ecological sources areas is identified in the study area,with a total area of 196.73 km2.The elements constituting landscape are mainly ecological land such as lakes and wetlands.There are 42 optimal ecological corridors with an average length of 6.53 km,and 27 potential ecological corridors with an average length of 4.28 km.The spatial distribution of corridors is uneven,with the density gradually downward from northeast to southwest.The protection and restoration of 17 ecological pinch points and 26 ecological barrier points can effectively improve regional landscape connectivity and enhance the stability of ecological networks.It is proposed to enhance the protection of ecological source areas,improve the connectivity of ecological corridors,and develop the strategy to optimize and restore the ecological nodes,aiming to ameliorate the eco-environment conservation and habitat quality in water network areas.
ecological networkwater network areaMSPAcircuit theoryWujiang District of Suzhou
万方数据
维普
