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Author Raap, T.; Pinxten, R.; Eens, M.
Title Artificial light at night disrupts sleep in female great tits (Parus major) during the nestling period, and is followed by a sleep rebound Type Journal Article
Year 2016 Publication (up) Environmental Pollution (Barking, Essex : 1987) Abbreviated Journal Environ Pollut
Volume 215 Issue Pages 125-134
Keywords Biology
Abstract Artificial light at night has been linked to a wide variety of physiological and behavioural consequences in humans and animals. Given that little is known about the impact of light pollution on sleep in wild animals, we tested how experimentally elevated light levels affected sleep behaviour of female songbirds rearing 10 day old chicks. Using a within-subject design, individual sleep behaviour was observed over three consecutive nights in great tits (Parus major), with females sleeping in a natural dark situation on the first and third night, whereas on the second night they were exposed to a light-emitting diode (1.6 lux). Artificial light in the nest box dramatically and significantly affected sleep behaviour, causing females to fall asleep later (95 min; while entry time was unaffected), wake up earlier (74 min) and sleep less (56%). Females spent a greater proportion of the night awake and the frequency of their sleep bouts decreased, while the length of their sleep bouts remained equal. Artificial light also increased begging of chicks at night, which may have contributed to the sleep disruption in females or vice versa. The night following the light treatment, females slept 25% more compared to the first night, which was mainly achieved by increasing the frequency of sleep bouts. Although there was a consistent pattern in how artificial light affected sleep, there was also large among-individual variation in how strongly females were affected. When comparing current results with a similar experiment during winter, our results highlight differences in effects between seasons and underscore the importance of studying light pollution during different seasons. Our study shows that light pollution may have a significant impact on sleep behaviour in free-living animals during the reproductive season, which may provide a potential mechanism by which artificial light affects fitness.
Address Department of Biology, Behavioural Ecology & Ecophysiology Group, University of Antwerp, Universiteitsplein 1, B-2610, Wilrijk, Belgium
Corporate Author Thesis
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Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0269-7491 ISBN Medium
Area Expedition Conference
Notes PMID:27179331 Approved no
Call Number LoNNe @ kyba @ Serial 1451
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Author Raap, T.; Casasole, G.; Pinxten, R.; Eens, M.
Title Early life exposure to artificial light at night affects the physiological condition: An experimental study on the ecophysiology of free-living nestling songbirds Type Journal Article
Year 2016 Publication (up) Environmental Pollution (Barking, Essex : 1987) Abbreviated Journal Environ Pollut
Volume 218 Issue Pages 909-914
Keywords Animals
Abstract Light pollution or artificial light at night (ALAN) is increasingly recognised to be an important anthropogenic environmental pressure on wildlife, affecting animal behaviour and physiology. Early life experiences are extremely important for the development, physiological status and health of organisms, and as such, early exposure to artificial light may have detrimental consequences for organism fitness. We experimentally manipulated the light environment of free-living great tit nestlings (Parus major), an important model species in evolutionary and environmental research. Haptoglobin (Hp) and nitric oxide (NOx), as important indicators of immunity, health, and physiological condition, were quantified in nestlings at baseline (13 days after hatching) and after a two night exposure to ALAN. We found that ALAN increased Hp and decreased NOx. ALAN may increase stress and oxidative stress and reduce melatonin which could subsequently lead to increased Hp and decreased NOx. Haptoglobin is part of the immune response and mounting an immune response is costly in energy and resources and, trade-offs are likely to occur with other energetically demanding tasks, such as survival or reproduction. Acute inhibition of NOx may have a cascading effect as it also affects other physiological aspects and may negatively affect immunocompetence. The consequences of the observed effects on Hp and NOx remain to be examined. Our study provides experimental field evidence that ALAN affects nestlings' physiology during development and early life exposure to ALAN could therefore have long lasting effects throughout adulthood.
Address Department of Biology, Behavioural Ecology and Ecophysiology Group, University of Antwerp, Wilrijk, Belgium
Corporate Author Thesis
Publisher Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0269-7491 ISBN Medium
Area Expedition Conference
Notes PMID:27531621 Approved no
Call Number LoNNe @ kyba @ Serial 1514
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Author Luarte, T.; Bonta, C.C.; Silva-Rodriguez, E.A.; Quijon, P.A.; Miranda, C.; Farias, A.A.; Duarte, C.
Title Light pollution reduces activity, food consumption and growth rates in a sandy beach invertebrate Type Journal Article
Year 2016 Publication (up) Environmental Pollution (Barking, Essex : 1987) Abbreviated Journal Environ Pollut
Volume 218 Issue Pages 1147-1153
Keywords Animals
Abstract The continued growth of human activity and infrastructure has translated into a widespread increase in light pollution. Natural daylight and moonlight cycles play a fundamental role for many organisms and ecological processes, so an increase in light pollution may have profound effects on communities and ecosystem services. Studies assessing ecological light pollution (ELP) effects on sandy beach organisms have lagged behind the study of other sources of disturbance. Hence, we assessed the influence of this stressor on locomotor activity, foraging behavior, absorption efficiency and growth rate of adults of the talitrid amphipod Orchestoidea tuberculata. In the field, an artificial light system was assembled to assess the local influence of artificial light conditions on the amphipod's locomotor activity and use of food patches in comparison to natural (ambient) conditions. Meanwhile in the laboratory, two experimental chambers were set to assess amphipod locomotor activity, consumption rates, absorption efficiency and growth under artificial light in comparison to natural light-dark cycles. Our results indicate that artificial light have significantly adverse effects on the activity patterns and foraging behavior of the amphipods, resulting on reduced consumption and growth rates. Given the steady increase in artificial light pollution here and elsewhere, sandy beach communities could be negatively affected, with unexpected consequences for the whole ecosystem.
Address Departamento de Ecologia y Biodiversidad, Facultad de Ecologia y Recursos Naturales, Universidad Andres Bello, Republica no. 440, Santiago, Chile; Center for the Study of Multiple-drivers on Marine Socio-ecological Systems (MUSELS), Universidad de Concepcion, Concepcion, Chile. Electronic address: cristian.duarte@unab.cl
Corporate Author Thesis
Publisher Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0269-7491 ISBN Medium
Area Expedition Conference
Notes PMID:27589894 Approved no
Call Number LoNNe @ kyba @ Serial 1516
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Author Schroer, S.; Hölker F.; Corcho, O.
Title The impact of citizen science on research about artificial light at night Type Journal Article
Year 2016 Publication (up) Environmental Scientist Abbreviated Journal
Volume 25 Issue 2 Pages 18-24
Keywords citizen science; light pollution research
Abstract
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Notes Approved no
Call Number LoNNe @ schroer @ Serial 1571
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Author Daoud-Opit, S.; Jones, D.N.
Title Guided by the light: Roost choice and behaviour of urban Rainbow Lorikeets (Trichoglossus haematodus) Type Journal Article
Year 2016 Publication (up) European Journal of Ecology Abbreviated Journal
Volume 2 Issue 1 Pages 72-80
Keywords Animals
Abstract 1. The formation of large communal roosts is a conspicuous phenomenon associated with a wide range of bird species successfully exploiting urban environments. In many Australian cities, the abundance of the Rainbow Lorikeet (Trichoglossus haematodus), a native parrot, has increased markedly in recent decades, with the species roosting in very large numbers within suburban sites. These roosting locations are noisy and cause significant fouling of the land beneath, resulting in conflict with humans.

2. We investigated the selection of roosting sites in this species in Brisbane, Australia, by comparing characteristics of both the general sites of these roosts as well as individual trees used within roosting sites and trees that were avoided.

3. Lorikeets used a wide variety of tree types for roosting but demonstrated a clear preference for clumped trees within sparsely treed areas that received significantly more artificial light at night than otherwise suitable sites and trees nearby.

4. These features of roosting sites may enhance the detection of nocturnal predators by Rainbow Lorikeets, suggesting a potential positive impact of anthropogenic lighting. Our findings provide valuable insights into the management of roost-related conflicts in urban areas. We encourage further investigations into the possible benefits of artificial light.
Address
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1339-8474 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number LoNNe @ kyba @ Serial 1641
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