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| 2. |
- Bell, David, et al.
(författare)
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Forest restoration to attract a putative umbrella species, the white-backed woodpecker, benefited saproxylic beetles
- 2015
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Ingår i: Ecosphere. - 2150-8925 .- 2150-8925. ; 6:12
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Tidskriftsartikel (refereegranskat)abstract
- Umbrella species are often spatially demanding and have limited ability to adapt to environmental changes induced by human land-use. This makes them vulnerable to human encroachment. In Sweden, broadleaved trees are disadvantaged by forestry, and commercially managed forests are often deprived of dead wood. This has led to a situation where previously widespread top predators in saproxylic food webs, such as the white-backed woodpecker (Dendrocopos leucotos), have become species of conservation concern. The white-backed woodpecker is generally considered an umbrella species, and it has been linked to forests with large volumes of dead wood from broadleaved trees. In recent years, forest stands have been restored for the white-backed woodpecker, but post-treatment evaluations have rarely included other species that also occur in broad-leaved forests (co-occurring species). Many co-occurring species are saproxylic beetles. In this study, we collected saproxylic beetles and environmental data in restored and commercially managed forests to evaluate if habitat restoration for the white-backed woodpecker also benefited other species with similar habitat associations. We found that volumes of coarse woody debris were higher in restored than in commercially managed forests, and that a majority of man-made snags and downed logs were created from birch trees (Betula spp.). Most spruce trees (Picea abies) were extracted during forest restoration, and this opened up the forest canopy, and created stands dominated by broadleaved trees. Many saproxylic beetles were more common in restored forests, and there were significant differences in species composition between treatments. These differences were largely explained by species traits. Effects of sun-exposure were particularly important, but many beneficiary species were also linked to dead wood from broadleaved trees. Red-listed saproxylic beetles showed a similar pattern with more species and individuals in restored sites. The white-backed woodpecker is still critically endangered in Sweden, but important prey species are already responding to forest restoration at the stand level. We recognize that landscape-level improvements will be required to bring the white-backed woodpecker back, but also that the umbrella species concept can provide a useful framework for successful forest restoration as many co-occurring saproxylic beetle species seemingly benefitted from restoration for the white-backed woodpecker.
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| 3. |
- Bocz, György Ängelkott, et al.
(författare)
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In the Eye of the Beholder. Swedish Rural Tourism Operators' and Visitors' Views and Perceptions on Reused Agricultural Buildings
- 2012
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Ingår i: Scandinavian Journal of Hospitality and Tourism. - : Informa UK Limited. - 1502-2250 .- 1502-2269. ; 12, s. 140-163
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Tidskriftsartikel (refereegranskat)abstract
- Reutilization of agricultural buildings for rural tourism (RT) is an area that is significantly expanding today. Buildings originally constructed for agricultural production, processing and housing are an essential part of most RT operations, both as a key resource and a significant cost centre. This study compared the perceptions of RT operators about visitors' opinions of buildings with visitors' actual opinions and attempted to identify the building feature preferences of tourists. The empirical evidence was collected using a 0-4 grade Likert-scale questionnaire that was either internet-based or provided in printed form. The results showed that RT operators partially misinterpreted how visitors view and experience reused buildings and the services therein. Although visitors found building technological factors to be less important than operators did, in a comparison of aggregated tourism-related and building-related factors both operators and visitors considered building-related factors to be of higher importance. Operators correctly believed that visitors view "atmosphere" and "style/character" as the most important factors. Consequently, the use of high-tech materials (e. g. insulation) and technology (e. g. computerized ventilation) are acceptable to visitors as long as the traditional character and atmosphere of rural buildings are retained. The results can be used to guide RT operators in building renovations/re-utilizations for their operations and to make financial savings.
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| 7. |
- Bodegård, Johan, et al.
(författare)
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DEBATT: Miljövänligt äta rött kött
- 2012
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Ingår i: Land Lantbruk & Skogsland. - 2002-5580. ; , s. 33-33
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Tidskriftsartikel (populärvet., debatt m.m.)
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| 8. |
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| 9. |
- Dahlström, Niklas, et al.
(författare)
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Long-term dynamics of large woody debris in a managed boreal forest stream.
- 2005
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Ingår i: Forest Ecology and Management. - : Elsevier BV. - 0378-1127 .- 1872-7042. ; 210:1-3, s. 363-373
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Tidskriftsartikel (refereegranskat)abstract
- Little is known about how past forest management in Sweden influenced the quantity and quality of large woody debris (LWD) in streams. The present study provides information of the long-term dynamics of LWD in a reach of a boreal stream intersecting a managed forest. Dendrochronological methods were used to reconstruct mortality years of the pieces of LWD and the general history of fire and cuttings of the surrounding riparian forest. Today, spruce dominates among the living trees, whereas the LWD is dominated by birch in the forest and by pine in the stream. Fire frequency prior to active fire suppression was similar to values reported from boreal forests. Pine trees were more abundant in the riparian forest before selective logging operations and active fire suppression began in the 1800s. Many of the pieces of LWD found in the stream today died more than 200 years ago and derived from a cohort of pines that generated in the early 1600s. Pine LWD in stream channels is highly resistant to decomposition and can reside for more than 300 years. A substantial amount of the LWD found today in managed forest streams in boreal Sweden most likely derives from the time before extensive human influence and is likely to decrease further in the future. Management of riparian forests to ascertain future supply of long-lived LWD in streams should target to increase the proportion of pine trees.
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| 10. |
- De Bruijn, Paulien, et al.
(författare)
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Mechanical properties of lime-hemp concrete containing shives and fibres
- 2009
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Ingår i: Biosystems Engineering. - : Elsevier BV. - 1537-5110 .- 1537-5129. ; 103:4, s. 474-479
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Tidskriftsartikel (refereegranskat)abstract
- The effect of using different binding agents in combination with hemp shives and fibres in Lime-Hemp Concrete (LHC) building material was examined. LHC is a light composite building material with building lime as binding agents and hemp (Cannabis sativa) as a renewable raw material from agriculture. Contemporary LHC only uses the woody core part of the hemp, the shive. However, using both hemp shives and fibres may improve the mechanical strength, eliminating the need for a fibre separation process. The aim was to elucidate the feasibility of using the entire fragmented hemp stalk in an LHC, and to determine some important material properties such as compressive strength, splitting tensile strength, water sorption and frost resistance. LHC with varying inclusions of the lime-based binders were tested, as were five mixes using the binding agents hydrated lime, hydraulic lime, and cement. Specimens were cured for 12 weeks at room temperature and 40 days in a carbonation room (4.5 vol% CO2), and tested for mechanical properties, water sorption and frost resistance. Using both shives and fibres in LHC may be advantageous for countries such as Sweden where facilities for separating hemp from shives are not commercially available.
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