Migration of Brown-headed Gulls on the Qinghai-Tibet Plateau:Potential transmission routes for highly pathogenic H5Nx virusOA
The Qinghai-Tibet Plateau serves as a critical hub along the Central Asian Flyway(CAF)and a recognized hotspot for the emergence of highly pathogenic avian influenza(HPAI)viruses.Despite recurrent outbreaks,the migratory dynamics of key reservoir species,such as the Brown-headed Gull(Chroicocephalus brunnicephalus)and their potential contributions to viral dissemination remain poorly understood.Here,we integrated highresolution GPS telemetry with Bayesian discrete phylogeographic analyses to investigate the potential association between migration and HPAI H5Nx dissemination.Based on tracking data from 11 individuals,we identified 5 major life-history stages and 12 important stopover sites used during migration,including 6 in autumn and 6 in spring,and characterized their spatiotemporal distribution patterns.Phylogenetic reconstruction showed that three independent introductions of HPAI H5Nx viruses occurred on the Qinghai-Tibet Plateau between 2021 and 2024,all involving strains associated with Brown-headed Gulls and classified into the 2021-H5N8Ⅰ,2021-H5N8Ⅱ,and 2022-H5N1 clusters.These viral clusters were distributed primarily along the CAF and the East Asian–Australasian Flyway(EAAF),with diffusion patterns broadly consistent with the spatiotemporal dynamics of migratory birds.Notably,the spread of the 2022-H5N1 cluster along the CAF was highly concordant with the migratory route and phenology of Brown-headed Gulls,while host transition analysis suggested that gulls may serve as bridging hosts in interspecies transmission.Together,these findings suggest that Brown-headed Gulls may contribute to the cross-regional dissemination and interspecies transmission of HPAI H5Nx viruses,and highlight the value of combining tracking data with viral genomics for cross-border surveillance.
Mengdan Fei;Yi Li;Shunmeng Qu;Xinru Lv;Chuanxiu Li;Xuyang Zhao;Yang Xiu;Qing An;Guofeng Zhang;Xiang Li;Siyuan Yang;Linhong Xie;Hongliang Chai
College of Wildlife and Protected Area,Northeast Forestry University,Harbin,150040,ChinaCollege of Wildlife and Protected Area,Northeast Forestry University,Harbin,150040,ChinaCollege of Wildlife and Protected Area,Northeast Forestry University,Harbin,150040,ChinaCollege of Wildlife and Protected Area,Northeast Forestry University,Harbin,150040,ChinaCollege of Wildlife and Protected Area,Northeast Forestry University,Harbin,150040,ChinaQinghai Wildlife Epidemic Source and Disease Monitoring Station,Xining,ChinaCollege of Wildlife and Protected Area,Northeast Forestry University,Harbin,150040,ChinaCollege of Wildlife and Protected Area,Northeast Forestry University,Harbin,150040,ChinaCollege of Wildlife and Protected Area,Northeast Forestry University,Harbin,150040,ChinaCollege of Wildlife and Protected Area,Northeast Forestry University,Harbin,150040,ChinaDepartment of Animal Science and Technology,Heilongjiang Vocational College for Nationalities,Harbin,150066,ChinaBiological Disaster Prevention and Control Center,National Forestry and Grassland Administration,Shenyang,110034,ChinaCollege of Wildlife and Protected Area,Northeast Forestry University,Harbin,150040,China
农业科技
Annual cycleGullsHighly pathogenic avian influenzaMigratory birdsSatellite trackingViral transmission
《Avian Research》 2026 (3)
P.714-722,9
supported by Heilongjiang Provincial Natural Science Foundation of China(ZL2025H001)National Natural Science Foundation of China(32500447)Prevention and Control of Emerging and Major Infectious Diseases-National Science and Technology Major Project(2025ZD01900100)Major Project of Guangzhou National Laboratory(GZNL2023A01001)State Key Laboratory for Animal Disease Control and Prevention Foundation(SKLADCPKF2024XX)the National Forestry and Grassland Administration,China。
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