Solar heating may explain extreme diel flight altitude changes in migrating birds
Great reed warblers, Acrocephalus arundinaceus,1 and great snipes, Gallinago media,2 exhibit a diel cycle in flight altitudes—flying much higher during the day than the night—when performing migratory flights covering both night and day. One hypothesis proposed to explain this behavior is that the b...
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2023
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Online Access: | https://lup.lub.lu.se/record/cab68783-eff9-4f6f-a5cc-a1a2eed05c9b https://doi.org/10.1016/j.cub.2023.08.035 |
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ftulundlup:oai:lup.lub.lu.se:cab68783-eff9-4f6f-a5cc-a1a2eed05c9b 2024-05-19T07:40:37+00:00 Solar heating may explain extreme diel flight altitude changes in migrating birds Sjöberg, Sissel Andersson, Arne Bäckman, Johan Hansson, Bengt Malmiga, Gintaras Tarka, Maja Hasselquist, Dennis Lindström, Åke Alerstam, Thomas 2023-10-09 https://lup.lub.lu.se/record/cab68783-eff9-4f6f-a5cc-a1a2eed05c9b https://doi.org/10.1016/j.cub.2023.08.035 eng eng Elsevier https://lup.lub.lu.se/record/cab68783-eff9-4f6f-a5cc-a1a2eed05c9b http://dx.doi.org/10.1016/j.cub.2023.08.035 scopus:85173584180 pmid:37689066 Current Biology; 33(19), pp 2-4237 (2023) ISSN: 0960-9822 Ecology Zoology diel cycle in altitude flight altitude flight behavior migration multisensor data loggers shorebird solar heating solar radiation songbird temperature regulation contributiontojournal/article info:eu-repo/semantics/article text 2023 ftulundlup https://doi.org/10.1016/j.cub.2023.08.035 2024-04-23T23:58:21Z Great reed warblers, Acrocephalus arundinaceus,1 and great snipes, Gallinago media,2 exhibit a diel cycle in flight altitudes—flying much higher during the day than the night—when performing migratory flights covering both night and day. One hypothesis proposed to explain this behavior is that the birds face additional heating by solar radiation during daytime and hence must climb to very high, and thus also very cold, altitudes to avoid overheating during daytime flights.1,2 Yet, solar heat gain in birds has been shown to drastically decrease with wind speed,3,4 and the quantitative heating effect by solar radiation on a bird flying with an airspeed of 10 m/s or more is unknown. We analyzed temperature data from multisensor data loggers (MDLs)5,6 placed without direct exposure to solar radiation on great reed warblers (the logger covered by feathers on the back) and great snipes (the logger on the leg, covered from the sun by the tail). We found that logger temperatures were significantly higher (5.9°C–8.8°C in great reed warblers and 4.8°C–5.4°C in great snipes) during the day than during the night in birds flying at the same altitudes (and thus also the same expected ambient air temperatures). These results strongly indicate that the heat balance of the flying birds is indeed affected by solar radiation, which is in accordance with the hypothesis that solar radiation is a key factor causing the remarkable diel cycles in flight altitude observed in these two long-distance migrant bird species.1,2 Article in Journal/Newspaper Gallinago media Lund University Publications (LUP) Current Biology 33 19 4232 4237.e2 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Ecology Zoology diel cycle in altitude flight altitude flight behavior migration multisensor data loggers shorebird solar heating solar radiation songbird temperature regulation |
spellingShingle |
Ecology Zoology diel cycle in altitude flight altitude flight behavior migration multisensor data loggers shorebird solar heating solar radiation songbird temperature regulation Sjöberg, Sissel Andersson, Arne Bäckman, Johan Hansson, Bengt Malmiga, Gintaras Tarka, Maja Hasselquist, Dennis Lindström, Åke Alerstam, Thomas Solar heating may explain extreme diel flight altitude changes in migrating birds |
topic_facet |
Ecology Zoology diel cycle in altitude flight altitude flight behavior migration multisensor data loggers shorebird solar heating solar radiation songbird temperature regulation |
description |
Great reed warblers, Acrocephalus arundinaceus,1 and great snipes, Gallinago media,2 exhibit a diel cycle in flight altitudes—flying much higher during the day than the night—when performing migratory flights covering both night and day. One hypothesis proposed to explain this behavior is that the birds face additional heating by solar radiation during daytime and hence must climb to very high, and thus also very cold, altitudes to avoid overheating during daytime flights.1,2 Yet, solar heat gain in birds has been shown to drastically decrease with wind speed,3,4 and the quantitative heating effect by solar radiation on a bird flying with an airspeed of 10 m/s or more is unknown. We analyzed temperature data from multisensor data loggers (MDLs)5,6 placed without direct exposure to solar radiation on great reed warblers (the logger covered by feathers on the back) and great snipes (the logger on the leg, covered from the sun by the tail). We found that logger temperatures were significantly higher (5.9°C–8.8°C in great reed warblers and 4.8°C–5.4°C in great snipes) during the day than during the night in birds flying at the same altitudes (and thus also the same expected ambient air temperatures). These results strongly indicate that the heat balance of the flying birds is indeed affected by solar radiation, which is in accordance with the hypothesis that solar radiation is a key factor causing the remarkable diel cycles in flight altitude observed in these two long-distance migrant bird species.1,2 |
format |
Article in Journal/Newspaper |
author |
Sjöberg, Sissel Andersson, Arne Bäckman, Johan Hansson, Bengt Malmiga, Gintaras Tarka, Maja Hasselquist, Dennis Lindström, Åke Alerstam, Thomas |
author_facet |
Sjöberg, Sissel Andersson, Arne Bäckman, Johan Hansson, Bengt Malmiga, Gintaras Tarka, Maja Hasselquist, Dennis Lindström, Åke Alerstam, Thomas |
author_sort |
Sjöberg, Sissel |
title |
Solar heating may explain extreme diel flight altitude changes in migrating birds |
title_short |
Solar heating may explain extreme diel flight altitude changes in migrating birds |
title_full |
Solar heating may explain extreme diel flight altitude changes in migrating birds |
title_fullStr |
Solar heating may explain extreme diel flight altitude changes in migrating birds |
title_full_unstemmed |
Solar heating may explain extreme diel flight altitude changes in migrating birds |
title_sort |
solar heating may explain extreme diel flight altitude changes in migrating birds |
publisher |
Elsevier |
publishDate |
2023 |
url |
https://lup.lub.lu.se/record/cab68783-eff9-4f6f-a5cc-a1a2eed05c9b https://doi.org/10.1016/j.cub.2023.08.035 |
genre |
Gallinago media |
genre_facet |
Gallinago media |
op_source |
Current Biology; 33(19), pp 2-4237 (2023) ISSN: 0960-9822 |
op_relation |
https://lup.lub.lu.se/record/cab68783-eff9-4f6f-a5cc-a1a2eed05c9b http://dx.doi.org/10.1016/j.cub.2023.08.035 scopus:85173584180 pmid:37689066 |
op_doi |
https://doi.org/10.1016/j.cub.2023.08.035 |
container_title |
Current Biology |
container_volume |
33 |
container_issue |
19 |
container_start_page |
4232 |
op_container_end_page |
4237.e2 |
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1799480208022044672 |