Factors influencing fall departure phenology in migratory birds that bred in northeastern North America
Abstract The phenology of migrating birds is shifting with climate change. For instance, short-distance migrants wintering in temperate regions tend to delay their migration in fall during spells of warmer temperature. However, some species do not show strong shifts, and the factors determining whic...
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croxfordunivpr:10.1093/auk/ukz064 2023-10-29T02:34:39+01:00 Factors influencing fall departure phenology in migratory birds that bred in northeastern North America Brisson-Curadeau, Émile Elliott, Kyle H Côté, Pascal 2019 http://dx.doi.org/10.1093/auk/ukz064 http://academic.oup.com/auk/advance-article-pdf/doi/10.1093/auk/ukz064/30351843/ukz064.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model The Auk ISSN 0004-8038 1938-4254 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 2019 croxfordunivpr https://doi.org/10.1093/auk/ukz064 2023-09-29T10:54:35Z Abstract The phenology of migrating birds is shifting with climate change. For instance, short-distance migrants wintering in temperate regions tend to delay their migration in fall during spells of warmer temperature. However, some species do not show strong shifts, and the factors determining which species will react to temperature changes by delaying their migration are poorly known. In addition, it is not known whether a slower migration or a postponed departure creates the observed delays in fall migration because most studies occur far south of the boreal breeding areas making it difficult to separate those 2 mechanisms. We used 22 yr of data at a northern observatory in eastern North America, at the southern edge of the boreal forest, to examine how 21 short-distance migrants responded to changing temperatures. We investigated if those species responding to temperature share life-history features (i.e. diet, size, total migration distance, breeding habitat, timing of migration). The period of migration in each species was, by far, the most important factor predicting the response of a species to temperature. Eight of the 13 species migrating in October changed their migration onset with temperature (usually by delaying migration by 1–2 days/°C), while the migration timing of none of the 8 species migrating in September was dependent on temperature. Furthermore, the absence of a greater migration delay by birds breeding farther from the study site (i.e. Arctic-breeding birds) suggests the mechanism is a postponed departure rather than a slower migration. We conclude that temperature variations in late fall influence the conditions on the breeding grounds, so that birds still present at that time benefit more from postponing their departure in warm weather. Article in Journal/Newspaper Arctic Climate change Oxford University Press (via Crossref) The Auk |
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Open Polar |
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Oxford University Press (via Crossref) |
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English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
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Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Brisson-Curadeau, Émile Elliott, Kyle H Côté, Pascal Factors influencing fall departure phenology in migratory birds that bred in northeastern North America |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Abstract The phenology of migrating birds is shifting with climate change. For instance, short-distance migrants wintering in temperate regions tend to delay their migration in fall during spells of warmer temperature. However, some species do not show strong shifts, and the factors determining which species will react to temperature changes by delaying their migration are poorly known. In addition, it is not known whether a slower migration or a postponed departure creates the observed delays in fall migration because most studies occur far south of the boreal breeding areas making it difficult to separate those 2 mechanisms. We used 22 yr of data at a northern observatory in eastern North America, at the southern edge of the boreal forest, to examine how 21 short-distance migrants responded to changing temperatures. We investigated if those species responding to temperature share life-history features (i.e. diet, size, total migration distance, breeding habitat, timing of migration). The period of migration in each species was, by far, the most important factor predicting the response of a species to temperature. Eight of the 13 species migrating in October changed their migration onset with temperature (usually by delaying migration by 1–2 days/°C), while the migration timing of none of the 8 species migrating in September was dependent on temperature. Furthermore, the absence of a greater migration delay by birds breeding farther from the study site (i.e. Arctic-breeding birds) suggests the mechanism is a postponed departure rather than a slower migration. We conclude that temperature variations in late fall influence the conditions on the breeding grounds, so that birds still present at that time benefit more from postponing their departure in warm weather. |
format |
Article in Journal/Newspaper |
author |
Brisson-Curadeau, Émile Elliott, Kyle H Côté, Pascal |
author_facet |
Brisson-Curadeau, Émile Elliott, Kyle H Côté, Pascal |
author_sort |
Brisson-Curadeau, Émile |
title |
Factors influencing fall departure phenology in migratory birds that bred in northeastern North America |
title_short |
Factors influencing fall departure phenology in migratory birds that bred in northeastern North America |
title_full |
Factors influencing fall departure phenology in migratory birds that bred in northeastern North America |
title_fullStr |
Factors influencing fall departure phenology in migratory birds that bred in northeastern North America |
title_full_unstemmed |
Factors influencing fall departure phenology in migratory birds that bred in northeastern North America |
title_sort |
factors influencing fall departure phenology in migratory birds that bred in northeastern north america |
publisher |
Oxford University Press (OUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1093/auk/ukz064 http://academic.oup.com/auk/advance-article-pdf/doi/10.1093/auk/ukz064/30351843/ukz064.pdf |
genre |
Arctic Climate change |
genre_facet |
Arctic Climate change |
op_source |
The Auk ISSN 0004-8038 1938-4254 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/auk/ukz064 |
container_title |
The Auk |
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1781057321844080640 |