Research on the Spatial and Temporal Evolution of Landscape Pattern in Sanming Urban Area and the Construc-tion of Ecological Network
The construction of the ecological network can help to make full use of the superior eco-environment of moun-tainous cities,restore the negative impact of rapid urbanization,and enhance regional ecosystem services and biodiversity.Taking the urban area of Sanming City as the research area,the changes of landscape pattern,ecological sources and eco-logical resistance surface in 2000,2010 and 2020 were compared and analyzed.And the morphological spatial pattern a-nalysis(MSPA),circuit theory,and gravity model were used to identify important ecological sources,build ecological corridors,and propose corresponding optimization strategies.The results show that:(1)From 2000 to 2020,the propor-tion of the core area all accounted for more than 50%of the total area of Sanming urban area,but showed a downward trend year by year.(2)11 important ecological sources were identified,and 24 ecological corridors have been constructed.(3)Three types of eco-corridors was divided by the gravity model,including 2 first-level corridors,5 second-level corri-dors,and 17 third-level corridors.(4)22 stepping stones,47 ecological pinch points,54 obstacle points and 114 break-ing points were identified.(5)The optimization strategies of restoring ecological breaking points,building stepping stones,protecting ecological pinch points,and removing ecological barrier points are proposed for the improvement of the stability of the ecological network and for enhancing the connectivity of regional landscapes.The results of this study can provide references for the construction of ecological network in mountainous cities.
urba area of Sanming Citylandscape patternmorphological spatial pattern analysiscircuit theorygravity modelecological network
万方数据
维普
