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Long-term effects of supplementary feeding of moose on browsing impact at a landscape scale

Mathisen, Karen Marie; Milner, Jos M.; van Beest, Floris M.; Skarpe, Christina
Journal article, Peer reviewed
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URI
http://hdl.handle.net/11250/134660
Date
2014
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  • Artikkel - fagfellevurdert vitenskapelig / Articles - peer-reviewed [1561]
Original version
Mathisen, K. M., Milner, J. M., van Beest, F., & Skarpe, C. (2013). Long-term effects of supplementary feeding of moose on browsing impact at a landscape scale. Forest Ecology and Management, 314C, 104-111.   10.1016/j.foreco.2013.11.037
Abstract
Supplementary feeding of wildlife is a common management practice, increasingly used to

reduce or divert herbivore impact from sensitive habitats, forestry or agriculture. The

landscape-scale spatial distribution of herbivory in relation to supplementary or diversionary

feeding stations is of particular relevance to wildlife and land management, yet has never been

quantified. We considered multiple hypotheses, based on central-place foraging theory, to

investigate how landscape-scale browsing impact changed as a function of distance from

feeding stations and thereby test the effectiveness of diversionary feeding. We assessed the

landscape-scale browsing impact of moose by quantifying browsing patterns and moose

density in commercially-valuable young Scots pine stands in an area of south-east Norway

with a long history of winter feeding. We also used positions from GPS-collared female

moose to investigate the spatial distribution of individuals across the landscape. Moose

density and browsing impact at a fine spatial scale (<1km) followed an exponential decrease

with distance from diversionary feeding stations. However, at a landscape scale (1-10 km),

browsing impact did not show any relationship with distance to feeding stations. Leader stem

browsing on Scots pine trees was high at both the local (< 1 km; 68 ± 12 %) and landscape (1-

10 km; 56 ± 7 %) scales. In addition, browsing on commercially valuable Norway spruce,

which is normally avoided by moose, was locally high around feeding stations. As currently

practiced, long-term diversionary feeding of moose was ineffective in diverting browsing

impact from young pine stands at the landscape scale. Browsing on commercially-important

tree species was sufficiently high that economic consequences could be expected. To avoid

further conflict, we suggest a combination of reducing the moose density and increasing the

availability of natural or more attractive supplementary forage.
Description
This is the author's version before it was send to the publisher. Therefore it can differ slightly from the published version. For the published version, please go to: http://www.sciencedirect.com/science/article/pii/S0378112713007925
Publisher
Elsevier Science
Journal
Forest Ecology and Management

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