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Vad styr älgars betesmönster?: Hur älgbetesskador på tall påverkas av tallungskogars rumsliga fördelning och areal
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
2019 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Browsing damage by moose in relation to stand size and degree of stand isolation (English)
Abstract [en]

One of the largest challenges humanity faces today is reducing CO₂-emissions to mitigate climate change. Part of the solution might be to increase the use of wood products. To do this, the efficiency of forestry has to be improved. In Sweden, a large obstacle for improving the efficiency of forestry is moose, or rather the damages its browsing causes on Scots pine. The aim of this study was to investigate how stand size and stand isolation affects the intensity of moose browsing damage on Scots pine. In addition, effects from tree density, stand age, and interactions between the different factors were investigated. This was done by using data from forest companies and field data collected from 29 Scots pine stands in central Sweden. The data were analysed in a multiple regression analysis, selecting the model that best explained variation in browsing damage. Results show that browsing damage was lower in more isolated stands. Stand size, however, did not have an effect on browsing damage. The factors stand age and Scots pine density had positive effects on the amount of browsing damage, but effects from stand age decreased with increasing pine density. In total, 77% of the variance in browsing damage was explained by the best model. In order to decrease browsing damage on Scots pine, I suggest that land owners take coordinated action to avoid creating large areas of young pine stands within the same area.

Place, publisher, year, edition, pages
2019. , p. 17
Keywords [en]
moose, Scots pine, browsing damage, isolation, stand size
Keywords [sv]
älg, tall, betesskador, isolering, beståndsstorlek
National Category
Ecology
Identifiers
URN: urn:nbn:se:umu:diva-158159OAI: oai:DiVA.org:umu-158159DiVA, id: diva2:1304920
Educational program
Bachelor of Science in Biology and Earthscience
Presentation
2019-03-25, KB.G5.01, Linnaeus väg 6, Umeå, 10:00 (Swedish)
Supervisors
Examiners
Available from: 2019-05-06 Created: 2019-04-15 Last updated: 2019-05-06Bibliographically approved

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fulltext(720 kB)38 downloads
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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • de-DE
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  • en-US
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  • nn-NO
  • nn-NB
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  • Other locale
More languages
Output format
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