Construction and Optimization of Ecological Network in Putian City based on Spatial Principal Component Analysis and Circuit Theory

REN Bowen; WANG Sipeng; LU Dongfang

doi:10.3969/j.issn.1002-2724.2026.01.010

Abstract：[Objective]Coastal cities experiencing rapid economic development will,to varying degrees,face issues such as fragmented ecological spatial layout,reduced urban green coverage,and isolated green spaces resulting from concentrated urban development and expansion.[Method]The construction of an urban-level ecological network can connect regional green spaces and enhance the capacity for ecological diversity conservation.This study takes Putian City as an example,employing the MSPA analysis method and landscape connectivity to extract ecological source areas.Through spatial principal component analysis,an ecological comprehensive resistance surface is constructed.Based on circuit theory,ecological corridors,ecological pinch points,and ecological barrier points are extracted and identified,initially establishing the ecological network of Putian City.Subsequently,the ecological network in the study area is optimized by adding"stepping stones,"new ecological source areas,and repairing ecological discontinuities.[Result]The results indicate that the initially extracted ecological source area covers 1515.12 km2,with 43 ecological corridors and 18 ecological nodes.After optimization,the total extracted ecological source area increases to 1577.41 km2.The optimization of the ecological network in Putian City is achieved through the identification and repair of 7 new"stepping stones,"5 new ecological source areas,34 ecological discontinuities,and a focus on ecological nodes.The optimized ecological network comprises 23 ecological source areas and 58 ecological corridors,with a more stable network structure and slight improvements in corridor network analysis indicators.[Conclusion]The findings of this study provide a reference for the future ecological civilization construction a nd regional ecological governance in Putian City,and offer insights for further research on the ecological network of Putian City.