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Exposure to artific...
Exposure to artificial light at night alters innate immune response in wild great tit nestlings
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- Ziegler, Ann-Kathrin (författare)
- Lund University,Lunds universitet,Evolutionär ekologi,Biologiska institutionen,Naturvetenskapliga fakulteten,Molekylär ekologi och evolution,Forskargrupper vid Lunds universitet,Evolutionary ecology,Department of Biology,Faculty of Science,Molecular Ecology and Evolution Lab,Lund University Research Groups
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- Watson, Hannah (författare)
- Lund University,Lunds universitet,Evolutionär ekologi,Biologiska institutionen,Naturvetenskapliga fakulteten,Livshistoria och funktionell ekologi,Forskargrupper vid Lunds universitet,Molekylär ekologi och evolution,Evolutionary ecology,Department of Biology,Faculty of Science,Life History and Functional Ecology,Lund University Research Groups,Molecular Ecology and Evolution Lab
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- Hegemann, Arne (författare)
- Lund University,Lunds universitet,Akvatisk ekologi,Forskargrupper vid Lunds universitet,Livshistoria och funktionell ekologi,Molekylär ekologi och evolution,Aquatic Ecology,Lund University Research Groups,Life History and Functional Ecology,Molecular Ecology and Evolution Lab
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- Meitern, Richard (författare)
- University of Tartu
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- Canoine, Virginie (författare)
- University of Vienna
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- Nilsson, Jan-Åke (författare)
- Lund University,Lunds universitet,Evolutionär ekologi,Biologiska institutionen,Naturvetenskapliga fakulteten,Livshistoria och funktionell ekologi,Forskargrupper vid Lunds universitet,Evolutionary ecology,Department of Biology,Faculty of Science,Life History and Functional Ecology,Lund University Research Groups
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- Isaksson, Caroline (författare)
- Lund University,Lunds universitet,Evolutionär ekologi,Biologiska institutionen,Naturvetenskapliga fakulteten,Livshistoria och funktionell ekologi,Forskargrupper vid Lunds universitet,Molekylär ekologi och evolution,Evolutionary ecology,Department of Biology,Faculty of Science,Life History and Functional Ecology,Lund University Research Groups,Molecular Ecology and Evolution Lab
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(creator_code:org_t)
- 2021-05-14
- 2021
- Engelska 10 s.
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Ingår i: Journal of Experimental Biology. - : The Company of Biologists. - 1477-9145 .- 0022-0949. ; 224:10
- Relaterad länk:
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http://dx.doi.org/10... (free)
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The large-scale impact of urbanization on wildlife is rather well documented; however, the mechanisms underlying the effects of urban environments on animal physiology and behaviour are still poorly understood. Here, we focused on one major urban pollutant – artificial light at night (ALAN) – and its effects on the capacity to mount an innate immune response in wild great tit (Parus major) nestlings. Exposure to ALAN alters circadian rhythms of physiological processes, by disrupting the nocturnal production of the hormone melatonin. Nestlings were exposed to a light source emitting 3 lx for seven consecutive nights. Subsequently, nestlings were immune challenged with a lipopolysaccharide injection, and we measured haptoglobin and nitric oxide levels pre- and post-injection. Both haptoglobin and nitric oxide are important markers for innate immune function. We found that ALAN exposure altered the innate immune response, with nestlings exposed to ALAN having lower haptoglobin and higher nitric oxide levels after the immune challenge compared with dark-night nestlings. Unexpectedly, nitric oxide levels were overall lower after the immune challenge than before. These effects were probably mediated by melatonin, as ALAN-treated birds had on average 49% lower melatonin levels than the dark-night birds. ALAN exposure did not have any clear effects on nestling growth. This study provides a potential physiological mechanism underlying the documented differences in immune function between urban and rural birds observed in other studies. Moreover, it gives evidence that ALAN exposure affects nestling physiology, potentially causing long-term effects on physiology and behaviour, which ultimately can affect their fitness.
Ämnesord
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
- NATURVETENSKAP -- Biologi -- Zoologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Zoology (hsv//eng)
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