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  • Sjöberg, SisselLund University,Lunds universitet,Evolutionär ekologi,Biologiska institutionen,Naturvetenskapliga fakulteten,CAnMove - Centrum för forskning om djurs spridning och flyttning,Forskargrupper vid Lunds universitet,Evolutionary ecology,Department of Biology,Faculty of Science,CAnMove - Centre for Animal Movement Research,Lund University Research Groups (author)

Solar heating may explain extreme diel flight altitude changes in migrating birds

  • Article/chapterEnglish2023

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  • 2023

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  • LIBRIS-ID:oai:lup.lub.lu.se:cab68783-eff9-4f6f-a5cc-a1a2eed05c9b
  • https://lup.lub.lu.se/record/cab68783-eff9-4f6f-a5cc-a1a2eed05c9bURI
  • https://doi.org/10.1016/j.cub.2023.08.035DOI

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  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

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  • 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

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  • Andersson, ArneLund University,Lunds universitet,Evolutionär ekologi,Biologiska institutionen,Naturvetenskapliga fakulteten,CAnMove - Centrum för forskning om djurs spridning och flyttning,Forskargrupper vid Lunds universitet,Evolutionary ecology,Department of Biology,Faculty of Science,CAnMove - Centre for Animal Movement Research,Lund University Research Groups(Swepub:lu)zooe-aar (author)
  • Bäckman, JohanLund University,Lunds universitet,Evolutionär ekologi,Biologiska institutionen,Naturvetenskapliga fakulteten,CAnMove - Centrum för forskning om djurs spridning och flyttning,Forskargrupper vid Lunds universitet,Evolutionary ecology,Department of Biology,Faculty of Science,CAnMove - Centre for Animal Movement Research,Lund University Research Groups(Swepub:lu)ekol-jba (author)
  • Hansson, BengtLund University,Lunds universitet,MEMEG,Biologiska institutionen,Naturvetenskapliga fakulteten,BECC: Biodiversity and Ecosystem services in a Changing Climate,Centrum för miljö- och klimatvetenskap (CEC),Könsskillnadernas genetik,Forskargrupper vid Lunds universitet,Molekylär ekologi och evolution,CAnMove - Centrum för forskning om djurs spridning och flyttning,Department of Biology,Faculty of Science,Centre for Environmental and Climate Science (CEC),Genetics of Sex Differences,Lund University Research Groups,Molecular Ecology and Evolution Lab,CAnMove - Centre for Animal Movement Research(Swepub:lu)ekol-bhn (author)
  • Malmiga, GintarasNature Research Center (NRC)(Swepub:lu)gi5310ma (author)
  • Tarka, MajaLund University,Lunds universitet,MEMEG,Biologiska institutionen,Naturvetenskapliga fakulteten,Artbildning, anpassning och samevolution,Forskargrupper vid Lunds universitet,Molekylär ekologi och evolution,CAnMove - Centrum för forskning om djurs spridning och flyttning,Department of Biology,Faculty of Science,Speciation, Adaptation and Coevolution,Lund University Research Groups,Molecular Ecology and Evolution Lab,CAnMove - Centre for Animal Movement Research(Swepub:lu)zooe-mat (author)
  • Hasselquist, DennisLund University,Lunds universitet,MEMEG,Biologiska institutionen,Naturvetenskapliga fakulteten,Ekologisk och evolutionär fysiologi,Forskargrupper vid Lunds universitet,Molekylär ekologi och evolution,CAnMove - Centrum för forskning om djurs spridning och flyttning,Department of Biology,Faculty of Science,Ecological and Evolutionary Physiology,Lund University Research Groups,Molecular Ecology and Evolution Lab,CAnMove - Centre for Animal Movement Research(Swepub:lu)ekol-dha (author)
  • Lindström, ÅkeLund University,Lunds universitet,Biodiversitet,Biologiska institutionen,Naturvetenskapliga fakulteten,BECC: Biodiversity and Ecosystem services in a Changing Climate,Centrum för miljö- och klimatvetenskap (CEC),Biodiversitet och bevarandevetenskap,Forskargrupper vid Lunds universitet,CAnMove - Centrum för forskning om djurs spridning och flyttning,Biodiversity,Department of Biology,Faculty of Science,Centre for Environmental and Climate Science (CEC),Biodiversity and Conservation Science,Lund University Research Groups,CAnMove - Centre for Animal Movement Research(Swepub:lu)ekol-ali (author)
  • Alerstam, ThomasLund University,Lunds universitet,Evolutionär ekologi,Biologiska institutionen,Naturvetenskapliga fakulteten,CAnMove - Centrum för forskning om djurs spridning och flyttning,Forskargrupper vid Lunds universitet,Evolutionary ecology,Department of Biology,Faculty of Science,CAnMove - Centre for Animal Movement Research,Lund University Research Groups(Swepub:lu)zooe-tal (author)
  • Evolutionär ekologiBiologiska institutionen (creator_code:org_t)

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  • In:Current Biology33:19, s. 2-42370960-9822

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Sjöberg, Sissel
Andersson, Arne
Bäckman, Johan
Hansson, Bengt
Malmiga, Gintara ...
Tarka, Maja
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Hasselquist, Den ...
Lindström, Åke
Alerstam, Thomas
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NATURAL SCIENCES
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and Ecology
NATURAL SCIENCES
NATURAL SCIENCES
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Current Biology
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