Decoupling of bird migration from the changing phenology of spring green- up

• 成果类型: Article
• 署名作者: Robertson, Ellen P.; La Sorte, Frank A.; Taillie, Paul J.; Mays, Jonathan D.; Robinson, Orin J.; Ansley, Robert J.; O'Connell, Timothy J.; Davis, Craig A.; Loss, Scott R.
• 署名单位: Oklahoma State University System; Oklahoma State University - Stillwater; Yale University; Yale University; Florida Fish & Wildlife Conservation Commission; University of North Carolina; University of North Carolina Chapel Hill; University of North Carolina School of Medicine; Cornell University
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-13972
• DOI: 10.1073/pnas.2308433121
• 发表日期: 2024-03-19
• 关键词: climate-change; extinction risk; resource waves; CONSEQUENCES; diversity; synchrony; shifts; winter; SPACE; index

摘要

The green - up of vegetation in spring brings a pulse of food resources that many animals track during migration. However, green - up phenology is changing with climate change, posing an immense challenge for species that time their migrations to coincide with these resource pulses. We evaluated changes in green - up phenology from 2002 to 2021 in relation to the migrations of 150 Western- Hemisphere bird species using eBird citizen science data. We found that green - up phenology has changed within bird migration routes, and yet the migrations of most species align more closely with long - term averages of green - up than with current conditions. Changing green - up strongly influenced phenological mismatches, especially for longer- distance migrants. These results reveal that bird migration may have limited flexibility to adjust to changing vegetation phenology and emphasize the mounting challenge migratory animals face in following en route resources in a changing climate.