[Construction of Ecological Security Pattern Based on the "Health-service-sensitivity" Framework in the Yellow River Basin].

The construction of ecological security patterns is helpful to maintain regional ecosystem stability and enhance ecological anti-interference ability， which is of great significance to ensure regional ecological security. Ecosystem health， ecosystem services， and ecological sensitivity are included in the evaluation index system， and the "health-service-sensitivity" evaluation framework is constructed. A comprehensive evaluation of the ecosystem is carried out to identify the ecological source in the Yellow River Basin. The ecological resistance surface is generated by combining natural geography and socio-economic factors. The circuit theory is used to identify the key ecological elements. The ecological security pattern is constructed， and the regional ecological protection strategies are proposed. The results showed that： ① From 2000 to 2020， the ecological comprehensive evaluation index of the Yellow River Basin showed an upward trend， and there were obvious spatial differences in the ecosystem status. The comprehensive index of ecosystem in the central and western and southern parts of the basin was relatively high. ② In 2020， the number of ecological sources in the Yellow River Basin reached 119， showing an increase of 23 compared to that in 2000. The spatial distribution showed a trend of discretization， mainly distributed in Sanjiangyuan Nature Reserve， Weihe River Basin， Fenhe River Basin， and the Qilian mountains. ③ The ecological network structure of the Yellow River Basin was relatively stable. In the past 20 years， 53 corridors have been added， extending to the west of the basin as a whole. The number of ecological pinch points has decreased by 12， and the number of ecological obstacle points has increased by 29. ④ The ecological security optimization strategy of "three zones， three districts， and multiple points" was proposed for the Yellow River Basin to offer a scientific reference for the high-level protection of its ecological environment.