Construction of Green Infrastructure Network in Water Network Area Based on InVEST Model and Circuit Theory-A Case Study of Nanxing Lake Area
With the development of new urbanization and the rapid expansion of construction land,the water network area in southern Jiangsu is facing problems of habitat fragmentation and ecological degradation.The construction of green infrastructure network is an effective measure to promote ecological space connectivity and protect biodiversity.Taking Nanxing Lake area in the northeast of Wujiang District of Suzhou as an example,based on the model of"identification of network center-extraction of connection cor-ridor-selection of strategic points",MSPA,InVEST models and landscape connectivity were used to identi-fy the network center,combined with circuit theory to extract connection corridor and select strategic points,a green infrastructure network was constructed in the water network area.There were 18 consensus network centers in the study area,mainly lake and forest ecological land,with dense distribution in the east and sparse distribution in the west.Thirty-five connecting corridors were extracted,and the spatial distri-bution was dense in the north and sparse in the south.Sixteen strategic points,including wetland,cultivated land and so on were selected,which were mostly distributed near Tongli Lake and Shitan Lake.Considering the importance of ecological services of landscape elements and the connectivity of ecological functions,the study on the construction of green infrastructure network in water network area has positive significance for improving the quality of regional ecological environment and promoting the stability and sustainable de-velopment of ecosystem.
green infrastructureMSPA and InVESTcircuit theoryecological network constructionsouth Jiangsu water network area
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