Rainfall-induced changes in food availability modify the spring departure programme of a migratory bird.
نویسندگان
چکیده
Climatic warming has intensified selection for earlier reproduction in many organisms, but potential constraints imposed by climate change outside the breeding period have received little attention. Migratory birds provide an ideal model for exploring such constraints because they face warming temperatures on temperate breeding grounds and declining rainfall on many tropical non-breeding areas. Here, we use longitudinal data on spring departure dates of American redstarts (Setophaga ruticilla) to show that annual variation in tropical rainfall and food resources are associated with marked change in the timing of spring departure of the same individuals among years. This finding challenges the idea that photoperiod alone regulates the onset of migration, providing evidence that intensifying drought in the tropical winter could hinder adaptive responses to climatic warming in the temperate zone.
منابع مشابه
Linking fluctuations in rainfall to nonbreeding season performance in a long-distance migratory bird, Setophaga ruticilla
Research on long-distance migratory birds has yielded some of the strongest evidence that shifts in climate are changing ecosystem processes. Much of this work has focused on understanding whether rising temperatures on temperate breeding grounds are advancing migration phenology and limiting reproductive success. However, conditions on tropical nonbreeding quarters can also shape these process...
متن کاملReconsidering the role of photoperiod in relation to effects of precipitation and food availability on spring departure of a migratory bird.
Along with many current studies investigating the impact of climatic change on the behavioural patterns of migratory birds, the paper by Studds & Mara [1] demonstrates relationships between environmental conditions and timing of departure from an overwintering site—Font Hill Nature Preserve in southwestern Jamaica—of the American Redstarts (Setophaga ruticilla), a Neotropical–Nearctic migrant. ...
متن کاملReconsidering the role of photoperiod in relation to effects of precipitation and food availability on spring departure of a migratory bird
Along with many current studies investigating the impact of climatic change on the behavioural patterns of migratory birds, the paper by Studds & Mara [1] demonstrates relationships between environmental conditions and timing of departure from an overwintering site—Font Hill Nature Preserve in southwestern Jamaica—of the American Redstarts (Setophaga ruticilla), a Neotropical–Nearctic migrant. ...
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The decline of long distance migratory songbirds has been linked to an increasing mismatch between spring arrival date and timing of food availability caused by climate change. It is unclear to what extent individuals can adjust migration timing or en route rate in response to annual variation in temperature at breeding sites. We tracked the ca. 7300 km spring migration of 52 purple martins Pro...
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The long-term advance in the timing of bird spring migration in the Northern Hemisphere is associated with global climate change. The extent to which changes in bird phenology reflect responses to weather conditions in the wintering or breeding areas, or during migration, however, remains to be elucidated. We analyse the relationships between the timing of spring migration of 9 species of trans...
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ورودعنوان ژورنال:
- Proceedings. Biological sciences
دوره 278 1723 شماره
صفحات -
تاریخ انتشار 2011