Geographic information system and climate big data applied in the research of bird migration

Climate change and habitat losses are the two most threatening factors for migratory birds and even the global ecosystem. This study analyzes the relationship between habitat loss and climate change and discusses their impacts on migratory birds. Results show that climate change causes migratory birds to advance their arrival and departure time in spring and change their egg-laying time due to prey phenology change. While habitat loss causes increase competition in winter habitat and stopovers. This will cause high winter mortality due to lack of food, and impact some species' reproduction success due to the time shift caused by habitat loss. Both climate change and habitat loss cause an impact on migratory birds, while these two factors also have impacts on each other. Climate change can not only exacerbate habitat loss but also cause habitat loss like ice habitat melting.