Longer days enable higher diurnal activity for migratory birds
Abstract Seasonal geophysical cycles strongly influence the activity of life on Earth because they affect environmental conditions like temperature, precipitation and day length. An increase in daylight availability during summer is especially enhanced when animals migrate along a latitudinal gradie...
Published in: | Journal of Animal Ecology |
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Online Access: | http://dx.doi.org/10.1111/1365-2656.13484 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13484 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2656.13484 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13484 |
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crwiley:10.1111/1365-2656.13484 2024-09-09T19:27:33+00:00 Longer days enable higher diurnal activity for migratory birds Pokrovsky, Ivan Kölzsch, Andrea Sherub, Sherub Fiedler, Wolfgang Glazov, Peter Kulikova, Olga Wikelski, Martin Flack, Andrea 2021 http://dx.doi.org/10.1111/1365-2656.13484 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13484 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2656.13484 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13484 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Journal of Animal Ecology volume 90, issue 9, page 2161-2171 ISSN 0021-8790 1365-2656 journal-article 2021 crwiley https://doi.org/10.1111/1365-2656.13484 2024-07-25T04:21:52Z Abstract Seasonal geophysical cycles strongly influence the activity of life on Earth because they affect environmental conditions like temperature, precipitation and day length. An increase in daylight availability during summer is especially enhanced when animals migrate along a latitudinal gradient. Yet, the question of how day length (i.e. daylight availability) influences the activity patterns of long‐distance, latitudinal migrants is still unclear. Here, we ask whether migration provides benefits to long‐distance migrants by enabling them to increase their diurnal movement activities due to an increase in daylight availability. To answer this question, we tested whether four vastly different species of long‐distance migratory birds—two arctic migrants and two mid‐latitude migrants—can capitalise on day length changes by adjusting their daily activity. We quantified the relationship between daily activity (measured using accelerometer data) and day length, and estimated each species' daily activity patterns. In addition, we evaluated the role of day length as an ultimate driver of bird migration. All four species exhibited longer activity periods during days with more daylight hours, showing a strong positive relationship between total daily activity and day length. The slope of this relationship varied between the different species, with activity increasing 1.5‐fold on average when migrating from wintering to breeding grounds. Underlying mechanisms of these relationships reveal two distinct patterns of daily activity. Flying foragers showed increasing activity patterns, that is, their daytime activities rose uniformly up to solar noon and decreased until dusk, thereby exhibiting a season‐specific activity slope. In contrast, ground foragers showed a constant activity pattern, whereby they immediately increased their activity to a certain level and maintained this level throughout the day. Our study reveals that long days allow birds to prolong their activity and increase their total daily activity. These ... Article in Journal/Newspaper Arctic Wiley Online Library Arctic Journal of Animal Ecology 90 9 2161 2171 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Seasonal geophysical cycles strongly influence the activity of life on Earth because they affect environmental conditions like temperature, precipitation and day length. An increase in daylight availability during summer is especially enhanced when animals migrate along a latitudinal gradient. Yet, the question of how day length (i.e. daylight availability) influences the activity patterns of long‐distance, latitudinal migrants is still unclear. Here, we ask whether migration provides benefits to long‐distance migrants by enabling them to increase their diurnal movement activities due to an increase in daylight availability. To answer this question, we tested whether four vastly different species of long‐distance migratory birds—two arctic migrants and two mid‐latitude migrants—can capitalise on day length changes by adjusting their daily activity. We quantified the relationship between daily activity (measured using accelerometer data) and day length, and estimated each species' daily activity patterns. In addition, we evaluated the role of day length as an ultimate driver of bird migration. All four species exhibited longer activity periods during days with more daylight hours, showing a strong positive relationship between total daily activity and day length. The slope of this relationship varied between the different species, with activity increasing 1.5‐fold on average when migrating from wintering to breeding grounds. Underlying mechanisms of these relationships reveal two distinct patterns of daily activity. Flying foragers showed increasing activity patterns, that is, their daytime activities rose uniformly up to solar noon and decreased until dusk, thereby exhibiting a season‐specific activity slope. In contrast, ground foragers showed a constant activity pattern, whereby they immediately increased their activity to a certain level and maintained this level throughout the day. Our study reveals that long days allow birds to prolong their activity and increase their total daily activity. These ... |
format |
Article in Journal/Newspaper |
author |
Pokrovsky, Ivan Kölzsch, Andrea Sherub, Sherub Fiedler, Wolfgang Glazov, Peter Kulikova, Olga Wikelski, Martin Flack, Andrea |
spellingShingle |
Pokrovsky, Ivan Kölzsch, Andrea Sherub, Sherub Fiedler, Wolfgang Glazov, Peter Kulikova, Olga Wikelski, Martin Flack, Andrea Longer days enable higher diurnal activity for migratory birds |
author_facet |
Pokrovsky, Ivan Kölzsch, Andrea Sherub, Sherub Fiedler, Wolfgang Glazov, Peter Kulikova, Olga Wikelski, Martin Flack, Andrea |
author_sort |
Pokrovsky, Ivan |
title |
Longer days enable higher diurnal activity for migratory birds |
title_short |
Longer days enable higher diurnal activity for migratory birds |
title_full |
Longer days enable higher diurnal activity for migratory birds |
title_fullStr |
Longer days enable higher diurnal activity for migratory birds |
title_full_unstemmed |
Longer days enable higher diurnal activity for migratory birds |
title_sort |
longer days enable higher diurnal activity for migratory birds |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1111/1365-2656.13484 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13484 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2656.13484 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2656.13484 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Journal of Animal Ecology volume 90, issue 9, page 2161-2171 ISSN 0021-8790 1365-2656 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/1365-2656.13484 |
container_title |
Journal of Animal Ecology |
container_volume |
90 |
container_issue |
9 |
container_start_page |
2161 |
op_container_end_page |
2171 |
_version_ |
1809896976140992512 |