Construction of Ecological Security Pattern for Plateau Lake Based on MSPA–MCR Model: A Case Study of Dianchi Lake Area

The construction of ecological security patterns is an effective means to improve environment quality, protect regional biodiversity, and alleviate the landscape fragmentation caused by urbanization in plateau lake cities. Taking Dianchi Lake area as example, we used morphological spatial pattern analysis method (MSPA) minimum cumulative resistance model (MCR) construct a comprehensive surface, corridor network, for study area. Firstly, selected 12 sources with more than 1000 hm2, PC, IIC index 1, high habitat quality connectivity from area, including body mountain forests south, north, west. overall eastern region was poor. Secondly, value 1.0925–4.5395. surface showed that influence human activities strong, between important Thirdly, identified 26 corridors interaction force values higher 50, mostly corridors, were close one another over 40 general lower 50 urban built-up areas, most which river corridors. Fourthly, identifying five potential 43 region, improved network function connectivity. α (loop pass degree), β (line point rate), γ (connectivity degree) 2.895, 5.5, 2.2 before optimization 3.206, 6.412, 2.422 after optimization, respectively. Lastly, “ridge lines” “valley screen nodes our “one core, three regions, belt” combining geographical characteristics research local policy planning guidance. We also provided control, restoration, suggestions based on plans other administrative regions different types source