Construction of ecological security patterns in the Kaidu-Kongque River Basin based on the supply and demand of ecosystem services
Received date: 2023-01-27
Revised date: 2023-02-14
Online published: 2023-05-30
The construction of an ecological security pattern in arid zones is conducive to promoting a dynamic balance between the supply and demand of regional ecosystem services. This study involves the Kaidu-Kongque River Basin in an arid zone and uses the InVEST model, the RWEQ model, and the Getis-Ord Gi* model to analyze the ecological supply sources, degree of land use, GDP per km2, population density, and the nighttime light index. This approach was used to analyze the ecological demand sources and determine the ecological corridors between supply and demand sources based on the minimum cumulative resistance model so as to construct an ecological security pattern of the study area. The results of the study are as follows: (1) There are 14 ecological supply source areas in the Kaidu-Kongque River Basin, accounting for 21.46% of the study area, and a total of 9 patches of key ecological demand source areas, accounting for 4.63% of the total area of the basin; 126 ecological corridors, including a total of 17 important corridors with a total length of 654.68 km; 65 ecological nodes, including 24 key ecological nodes. (2) The spatial mismatch between supply and demand of ecosystem services in Kaidu-Kongque River Basin is obvious, and the high supply area and high demand area show obvious characteristics with urban boundary as the dividing line. (3) Combining the natural geographic characteristics and the mobility of landscape ecosystem services in the study area, the resistance surface model is used to construct “two cores, two zones, three horizons, four verticals, and multiple nodes” of the Kaidu-Kongque River Basin. In conclusion, the ecological security pattern of the Kaidu-Kongque River Basin can provide a scientific reference for protecting regional ecosystem service functions and formulating sustainable development policies.
Yujiang YAN , Jiangui LI , Junli LI , Teng Jiang . Construction of ecological security patterns in the Kaidu-Kongque River Basin based on the supply and demand of ecosystem services[J]. Arid Zone Research, 2023 , 40(5) : 829 -839 . DOI: 10.13866/j.azr.2023.05.15
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