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Habitat selection and food choice of white-naped cranes(Grus vipio)at stopover sites based on satellite tracking and stable isotope analysis

引用

Avian Research 2022年第4期13卷 468-476页

作者： Yunzhu Liu Lan Wu Jia Guo Shengwu Jiao Sicheng Ren Cai Lu Yuyu Wang Yifei Jia Guangchun Lei Li Wen Liying Su Centre for East Asian-Australasian Flyway Studies Beijing Forestry UniversityBeijing100083China School of Ecology and Nature Conservation Beijing Forestry UniversityBeijing100083China Research Institute of Subtropical Forestry Chinese Academy of ForestryWetland Ecosystem Research Station of Hangzhou BayHangzhou311400China Science Economics and Insights DivisionNSW Department of PlanningIndustry and EnvironmentSydney2150Australia Department of Earth and Environmental Sciences Macquarie UniversitySydney2109Australia International crane Foundation BarabooWI53913USA

By combining satellite tracking,land-cover extracted from Landsite 8 images,and the traditional stable isotope analysis,we studied the habitat selection and food preference of a vulnerable migratory waterbird,the whitenaped crane(Grus vipio),in one of its key stagging sites,the Shandian River Basin in the semi-arid northern China,to provide knowledge that is critical for its conservation in the *** results showed that the white-naped cranes used both uplands and natural wetlands in the stopover *** the cranes used farmland and natural land cover equally as night-time roosting grounds,they spent most daytime foraging at *** the extensive usage of croplands as their foraging ground,the Bayesian mixing models based on stable isotopic analysis revealed that crop residues after harvesting,such as Maize(Zea mays)and Naked Oat(Avena chinensis),were only a small fraction of the white-naped cranes’diet(~19%),and their diet composited mainly natural plants,such as Allium ledebourianum,Potentilla anserina,and ***,more than 20%of the total wetlands in the region were modelled as home range of the *** contrast,less than 10%of croplands and about 1%of the unused uplands were identified as home *** addition,the entire core habitats were located in natural *** findings demonstrated the importance of natural wetlands for the survival of the threatened ***,the satellite-derived land cover data showed that croplands increased rapidly in the last decade in this area,at the expense of natural *** the sharp decrease of white-naped crane population in China,the conservation of stopover sites becomes *** on our analysis,we recommend the following management actions:conserving adequate natural wetland area,regulating anthropogenic pressures such as the use of herbicides,expanding the duration and extent of current conservation regulations,establishing a comprehensive monitoring progr

关键词： Biased random bridge Food resource Stopover Utilization distribution white-naped crane

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