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Contrasting responses of two passerine bird species to moose browsing

Mathisen, Karen Marie; Pedersen, Simen; Nilsen, Erlend Birkeland; Skarpe, Christina
Journal article, Peer reviewed
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URI
http://hdl.handle.net/11250/134470
Date
2012
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  • Artikkel - fagfellevurdert vitenskapelig / Articles - peer-reviewed [1247]
Original version
Mathisen, K. M., Pedersen, S., Nilsen, E. B., & Skarpe, C. (2011). Contrasting responses of two passerine bird species to moose browsing. European Journal of Wildlife Research, 58(3), 535-547. doi: 10.1007/s10344-011-0601-3   http://dx.doi.org/10.1007/s10344-011-0601-3
Abstract
Large herbivores may modify the ecosystem in a way that affects habitat quality and resource availability for

other fauna. The increase in wild ungulate abundance in many areas may therefore lead to ecosystem changes,

affecting distribution and reproduction of other species. Moose (Alces alces) in Scandinavia is a good example of

a herbivore that has recently increased in abundance, and has the potential to affect the ecosystem. In this study

we investigated how different levels of moose winter activity around supplementary feeding stations for moose

affect reproduction in two insectivorous passerines: great tits (Parus major) and pied flycatchers (Ficedula

hypoleuca). The two bird species showed contrasting responses to high moose activity at feeding stations. Great

tits avoided habitats with high moose activity, where fledging success and feeding frequency was lower than at

low moose activity habitats. Flycatchers nested more often at high moose activity habitats where fledging weight

and feeding frequency were higher than at low moose activity habitats. Filming of nest boxes with great tits

showed an increase in adult Lepidoptera in the diet at supplementary feeding stations for moose, and a smaller

size of caterpillar prey at intermediate moose activity. The results support the hypothesis that herbivores may

affect insectivorous passerines through changed arthropod food availability.
Description
This is the postprint version of the article. The original publication is available at www.springerlink.com
Publisher
Springer
Journal
European Journal of Wildlife Research

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