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Artificial light at night, in interaction with spring temperature, modulates timing of reproduction in a passerine bird

Dominoni, Davide M. ; Kjellberg Jensen, Johan LU ; de Jong, Maaike ; Visser, Marcel E. and Spoelstra, Kamiel (2020) In Ecological Applications 30(3).
Abstract

The ecological impact of artificial light at night (ALAN) on phenological events such as reproductive timing is increasingly recognized. In birds, previous experiments under controlled conditions showed that ALAN strongly advances gonadal growth, but effects on egg-laying date are less clear. In particular, effects of ALAN on timing of egg laying are found to be year-dependent, suggesting an interaction with climatic conditions such as spring temperature, which is known have strong effects on the phenology of avian breeding. Thus, we hypothesized that ALAN and temperature interact to regulate timing of reproduction in wild birds. Field studies have suggested that sources of ALAN rich in short wavelengths can lead to stronger advances in... (More)

The ecological impact of artificial light at night (ALAN) on phenological events such as reproductive timing is increasingly recognized. In birds, previous experiments under controlled conditions showed that ALAN strongly advances gonadal growth, but effects on egg-laying date are less clear. In particular, effects of ALAN on timing of egg laying are found to be year-dependent, suggesting an interaction with climatic conditions such as spring temperature, which is known have strong effects on the phenology of avian breeding. Thus, we hypothesized that ALAN and temperature interact to regulate timing of reproduction in wild birds. Field studies have suggested that sources of ALAN rich in short wavelengths can lead to stronger advances in egg-laying date. We therefore tested this hypothesis in the Great Tit (Parus major), using a replicated experimental set-up where eight previously unlit forest transects were illuminated with either white, green, or red LED light, or left dark as controls. We measured timing of egg laying for 619 breeding events spread over six consecutive years and obtained temperature data for all sites and years. We detected overall significantly earlier egg-laying dates in the white and green light vs. the dark treatment, and similar trends for red light. However, there was a strong interannual variability in mean egg-laying dates in all treatments, which was explained by spring temperature. We did not detect any fitness consequence of the changed timing of egg laying due to ALAN, which suggests that advancing reproduction in response to ALAN might be adaptive.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
artificial light at night, light pollution, Parus major, phenology, timing of reproduction, urbanization
in
Ecological Applications
volume
30
issue
3
article number
e02062
pages
11 pages
publisher
Ecological Society of America
external identifiers
  • pmid:31863538
  • scopus:85077902144
ISSN
1051-0761
DOI
10.1002/eap.2062
language
English
LU publication?
yes
id
cf8aff3e-ada0-4463-b642-8befd5268e87
date added to LUP
2020-04-15 10:02:12
date last changed
2021-04-06 01:52:35
@article{cf8aff3e-ada0-4463-b642-8befd5268e87,
  abstract     = {<p>The ecological impact of artificial light at night (ALAN) on phenological events such as reproductive timing is increasingly recognized. In birds, previous experiments under controlled conditions showed that ALAN strongly advances gonadal growth, but effects on egg-laying date are less clear. In particular, effects of ALAN on timing of egg laying are found to be year-dependent, suggesting an interaction with climatic conditions such as spring temperature, which is known have strong effects on the phenology of avian breeding. Thus, we hypothesized that ALAN and temperature interact to regulate timing of reproduction in wild birds. Field studies have suggested that sources of ALAN rich in short wavelengths can lead to stronger advances in egg-laying date. We therefore tested this hypothesis in the Great Tit (Parus major), using a replicated experimental set-up where eight previously unlit forest transects were illuminated with either white, green, or red LED light, or left dark as controls. We measured timing of egg laying for 619 breeding events spread over six consecutive years and obtained temperature data for all sites and years. We detected overall significantly earlier egg-laying dates in the white and green light vs. the dark treatment, and similar trends for red light. However, there was a strong interannual variability in mean egg-laying dates in all treatments, which was explained by spring temperature. We did not detect any fitness consequence of the changed timing of egg laying due to ALAN, which suggests that advancing reproduction in response to ALAN might be adaptive.</p>},
  author       = {Dominoni, Davide M. and Kjellberg Jensen, Johan and de Jong, Maaike and Visser, Marcel E. and Spoelstra, Kamiel},
  issn         = {1051-0761},
  language     = {eng},
  month        = {04},
  number       = {3},
  publisher    = {Ecological Society of America},
  series       = {Ecological Applications},
  title        = {Artificial light at night, in interaction with spring temperature, modulates timing of reproduction in a passerine bird},
  url          = {http://dx.doi.org/10.1002/eap.2062},
  doi          = {10.1002/eap.2062},
  volume       = {30},
  year         = {2020},
}