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02.12.2015 | Ausgabe 2/2016

Urban Ecosystems 2/2016

The effect of artificial lighting on the arrival time of birds using garden feeding stations in winter: A missed opportunity?

Zeitschrift:
Urban Ecosystems > Ausgabe 2/2016
Autoren:
Gary D. Clewley, Kate E. Plummer, Robert A. Robinson, Clare H. Simm, Mike P. Toms
Wichtige Hinweise

Electronic supplementary material

The online version of this article (doi:10.​1007/​s11252-015-0516-y) contains supplementary material, which is available to authorized users.

Abstract

The proliferation of artificial lighting at night is one of the key anthropogenic changes associated with urbanised areas as well as some non-urban areas. Disruption to natural light/dark regimes can have considerable effects on the timing of different behaviours of birds, particularly during the breeding season. However, the effect of artificial lights on the timing of behaviours during winter has received relatively little attention, despite the fact that time partitioning of foraging can have implications for avian winter survival. In this study, we assess at a landscape scale during winter, whether birds arrive at feeding stations earlier in areas with increased levels of artificial lighting using data from a citizen science project. Arrival times of the ten most commonly recorded species were associated with a combination of the density of artificial lights, temperature, rainfall and urban land cover. We found no evidence that birds advance the onset of foraging in gardens with more artificial lights nearby; contrary to our prediction, birds generally arrived later into these areas. This is possibly a response to differences in food availability or predation risk in areas with more artificial lights. We conclude that artificial light at night may not be as important for driving the timing of foraging behaviour in winter as previously thought, but it remains to be seen whether this represents a missed opportunity to extend the foraging period or an adaptive response.

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