Abstract
Artificial light at night disturbs the daily rhythms of many organisms. To what extent this disturbance depends on the intensity and spectral composition of light remain obscure. Here, we measured daily activity patterns of captive blue tits (Cyanistes caeruleus) exposed to similar intensities of green, red, or white light at night. Birds advanced their onset of activity in the morning under all light colors but more under red and white light than under green light. Offset of activity was slightly delayed in all light colors. The total activity over a 24-h period did not change but birds moved a part of their daily activity into the night. Since the effect of red and white lights are comparable, we tested the influence of light intensity in a follow-up experiment, where we compared the activity of the birds under different intensities of green and white light only. While in the higher range of intensities, the effects of white and green light were comparable; at lower intensities, green light had a less disturbing effect as compared with white light on daily rhythms in blue tits. Our results show that the extent of this disturbance can be mitigated by modulating the spectral characteristics and intensity of outdoor lighting, which is now feasible through the use of LED lighting.
Original language | English |
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Pages (from-to) | 323-333 |
Number of pages | 11 |
Journal | Journal of Biological Rhythms |
Volume | 32 |
Issue number | 4 |
DOIs | |
Publication status | Published - 26 Jul 2017 |
Keywords
- NIOO
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Dive into the research topics of 'Early Birds by Light at Night: Effects of Light Color and Intensity on Daily Activity Patterns in Blue Tits'. Together they form a unique fingerprint.Datasets
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Replication Data for: Early Birds by Light at Night: Effects of Light Color and Intensity on Daily Activity Patterns in Blue Tits
de Jong, M. (Creator) & Spoelstra, K. (Other), DataverseNL, 29 Jan 2019
https://hdl.handle.net/10411/4PAXWN
Dataset
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Replication Data for: Early Birds by Light at Night: Effects of Light Color and Intensity on Daily Activity Patterns in Blue Tits
de Jong, M. (Creator) & Spoelstra, K. (Rights Holder), DataverseNL, 09 Apr 2019
DOI: 10411/4PAXWN
Dataset