Factors influencing fall departure phenology in migratory birds that bred in northeastern North America
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...
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ftzenodo:oai:zenodo.org:4245061 2023-05-15T15:15:08+02:00 Factors influencing fall departure phenology in migratory birds that bred in northeastern North America Côté, Pascal Brisson-Curadeau, Émile Elliott, Kyle 2020-10-29 https://zenodo.org/record/4245061 https://doi.org/10.5061/dryad.8cz8w9gk6 unknown https://zenodo.org/communities/dryad https://zenodo.org/record/4245061 https://doi.org/10.5061/dryad.8cz8w9gk6 oai:zenodo.org:4245061 info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode info:eu-repo/semantics/other dataset 2020 ftzenodo https://doi.org/10.5061/dryad.8cz8w9gk6 2023-03-11T00:56:23Z 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 two mechanisms. We used 22 years 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 1-2d/°C), while the migration timing of none of the eight 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 might benefit more from postponing their departure in warm weather. Funding provided by: Environment and Climate Change CanadaCrossref Funder Registry ID: http://dx.doi.org/10.13039/501100008638Award Number: Funding provided by: Ministère des Forêts, de la Faune et des ParcsCrossref Funder Registry ID: ... Dataset Arctic Climate change Zenodo Arctic |
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description |
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 two mechanisms. We used 22 years 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 1-2d/°C), while the migration timing of none of the eight 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 might benefit more from postponing their departure in warm weather. Funding provided by: Environment and Climate Change CanadaCrossref Funder Registry ID: http://dx.doi.org/10.13039/501100008638Award Number: Funding provided by: Ministère des Forêts, de la Faune et des ParcsCrossref Funder Registry ID: ... |
format |
Dataset |
author |
Côté, Pascal Brisson-Curadeau, Émile Elliott, Kyle |
spellingShingle |
Côté, Pascal Brisson-Curadeau, Émile Elliott, Kyle Factors influencing fall departure phenology in migratory birds that bred in northeastern North America |
author_facet |
Côté, Pascal Brisson-Curadeau, Émile Elliott, Kyle |
author_sort |
Côté, Pascal |
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 |
publishDate |
2020 |
url |
https://zenodo.org/record/4245061 https://doi.org/10.5061/dryad.8cz8w9gk6 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change |
genre_facet |
Arctic Climate change |
op_relation |
https://zenodo.org/communities/dryad https://zenodo.org/record/4245061 https://doi.org/10.5061/dryad.8cz8w9gk6 oai:zenodo.org:4245061 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.8cz8w9gk6 |
_version_ |
1766345510144180224 |