| 1. |
- Högberg, Karl-Anders, et al.
(författare)
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Critical factors affecting ex vitro performance of somatic embryo plants of Picea abies
- 2001
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 16:4, s. 295-304
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The potential to use somatic embryos for large-scale propagation of elite genotypes, for integration into breeding programmes and for connecting breeding and mass propagation, is receiving much attention. However, before the methods are applied it is important that the plants regenerated via somatic embryogenesis grow as expected, i.e. as seedlings or cuttings. Growth of somatic embryo plants is under a cumulative influence of a number of treatments given during the in vitro phase and during the ex vitro establishment phase. The aim of this study was to identify treatments with a negative influence on the subsequent growth of somatic embryo plants of Norway spruce (Picea abies L. Karst.). Based on the results, the time of contact with abscisic acid during somatic embryo maturation and the length of continuous light treatment (CLT) during the first growth period strongly affect the height growth during two successive growth periods. In both cases longer treatments exerted negative effects. Based on these results a new method was set up, which includes: (1) prematuration treatment of the suspension culture in a growth regulator-free medium, by which the maturation step is synchronized and contracted; and (2) a two-phase germination treatment, first on a solidified medium and then in a liquid medium. This treatment avoids extended CLT during the first growth period. Another advantage of the two-phase germination treatment is a better root-system development. Somatic embryo plants produced according to this method can be transferred directly from in vitro conditions to the greenhouse.
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| 2. |
- Abrahamsson, Sara, et al.
(författare)
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Inheritance of height growth and autumn cold hardiness based on two generations of full-sib and half-sib families of Pinus sylvestris
- 2012
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 27, s. 405-413
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Tidskriftsartikel (refereegranskat)abstract
- The genetic variability in height growth and autumn cold hardiness were evaluated in a full-sib family of Scots pine (Pinus sylvestris (L.)) in a field trial in northern Sweden and 358 open pollinated families generated from the progeny of the full-sib cross. Height and autumn cold hardiness were assessed in the progeny of the full-sib cross at 9-19 years of age and on 3995 open pollinated progenies at three years of age. The autumn cold hardiness [critical temperature (CT)] of trees and progenies was tested by artificial freeze testing of detached needles at various temperatures. Significant genetic variation was found among progenies in both height growth and cold hardiness with a narrow sense heritability of 0.16 and 0.37, respectively. There was also a significant positive genetic correlation (r(a) = 0.39) between height growth and CT with taller trees showing later autumn cold acclimation. It was concluded that there is significant additive genetic variance for height and CT which warrants a potential for mapping quantitative trait loci. Furthermore, the low heritability for height growth shows the importance of removing the environmental influence by using additive genetic predictions instead of phenotypic measurements thereby improving the accuracy of genetic associations.
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| 3. |
- Alarcon Ferrari, Cristian, et al.
(författare)
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Forest research from a critical perspective - How can it contribute to new knowledge?
- 2012
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 27, s. 108-119
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Tidskriftsartikel (refereegranskat)abstract
- This paper develops insights from critical social theory with the aim of laying some foundations for critical forest research (CFR). The authors argue that such an approach could create needed knowledge about contemporary forest issues. In doing so, the paper first delves into the distinction between forest policy and politics of forests which is identified as a conceptually relevant issue within the context of CFR. Second, it uses the outcomes of the workshop Forest research from a critical perspective - How can it contribute to new knowledge? that was convened by the authors at the first Nordic Conference on Forest Policy Science held in Uppsala October 2010 to build on the conceptualisation of politics and policy within forest research. The combined findings of both a literature review on the issue of politics of forest and forest policy and the aforementioned workshop show that the conceptual difference between policy and politics is a key theoretical issue in relation to future prospects for CFR. In addition the results of the workshop clearly identified the epistemological, normative, social change dimensions and awareness of structural barriers as being at the core of attempts to develop theoretically grounded CFR. It is argued that a clarification of the concept "critique" is important within this context.
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| 4. |
- Andersson, Elias, et al.
(författare)
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In the eye of the storm : adaptation logics of forest owners in management and planning in Swedish areas
- 2018
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Ingår i: Scandinavian Journal of Forest Research. - : Taylor & Francis. - 0282-7581 .- 1651-1891. ; 33:8, s. 800-808
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Tidskriftsartikel (refereegranskat)abstract
- With a changing climate, storm and wind throw is becoming an increasing risk to forest. However, Swedish forest management practices have so far involved relatively little consideration of adaptation to climate change. This study examined resistance and alternatives to business as usual forest management, drawing upon material obtained in interviews with individual forest owners who spontaneously identified and discussed storm and wind throw as a risk to their forest. They thereby expressed a logic differing from that of the forest industry in Sweden, which has largely normalised storm risk rather than considering it in climate change adaptation work. The present analysis illustrates the broad and largely concerned position of individual forest owners, in contrast with a more established industry position on storm as an accepted and existing risk. Overall, the study highlights the diversity, agency and power relations within Swedish forestry and the forested landscape - aspects that are vital to better understanding processes relevant to forest and climate change adaptation.
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| 5. |
- Andersson, Elias, et al.
(författare)
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Service logics and strategies of Swedish forestry in the structural shifts of forest ownership : challenging the "old" and shaping the "new"
- 2019
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Ingår i: Scandinavian Journal of Forest Research. - : Taylor & Francis. - 0282-7581 .- 1651-1891. ; 34:6, s. 508-520
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Tidskriftsartikel (refereegranskat)abstract
- Sweden is one of the most forested countries in Europe, and it has one of the highest shares of productive forest. Production in forestry is largely reliant on the private non-industrial forest owners, who own half of the forest land. As in many countries, however, forest ownership is changing towards a higher extent of urban, female or non-forestry-background owners. This poses a challenge for the forestry services sector, mainly forest owners' associations and companies, but also broadly the sector at large. By exploring the sales and marketing processes, this paper analyses the service logics and strategies of Swedish forestry under changing forest ownership, drawing on an interview study covering all the large actors in the Swedish forestry sector. The study illustrates an increased focus of forestry organizations on services from a strategic and managerial perspective, in customer-oriented relationship development and in value creation and sales processes, specifically in order to manage "new" forest owners and the demand of forest industries. The results highlight the domination of service logics associated with timber production and the challenges for the service market and the provision of diversified services to forest owners.
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| 6. |
- Andersson, Jon, et al.
(författare)
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Short-term response to stump harvesting by the ground flora in boreal clearcuts
- 2017
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 32:3, s. 239-245
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Tidskriftsartikel (refereegranskat)abstract
- We studied short-term ground vegetation responses to stump harvesting by recording the occurrence of all species of bryophytes, vascular plants and the cover of soil disturbance on 20 clearcuts in the Southern and Middle Boreal zone in northern Scandinavia. All 20 clearcuts were slash-harvested and scarified and 10 of the clearcuts were also stump-harvested. The added effect of stump harvesting was assessed by comparing stump-harvested clearcuts with non-stump-harvested clearcuts. We tested whether stump harvesting causes extra soil disturbance compared to conventional forestry and if stump harvesting is affecting the assemblage, species richness and occurrence of individual species of vascular plants and bryophytes in boreal clearcuts. Our results revealed that stump harvesting causes an increase in the area of disturbed soil surface compared to conventional harvesting. Four of the most commonly occurring plant species in this area were significantly affected by stump harvesting, and Vaccinium vitis-idaea had a median occurrence of only 20% of that in non-stump-harvested clearcuts. The large impact on some plant species from a relatively modest increase of soil disturbance caused by stump harvesting suggest that stumps, with their slightly elevated bases, contributes to the survival of certain species on clearcuts.
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| 7. |
- Andersson, Jon, et al.
(författare)
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Tree cavity densities and characteristics in managed and unmanaged Swedish boreal forest
- 2018
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 33, s. 233-244
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Tidskriftsartikel (refereegranskat)abstract
- In forests worldwide, similar to 10-40% of bird and mammal species require cavities for nesting or roosting. Although knowledge of tree cavity availability and dynamics has increased during past decades, there is a striking lack of studies from boreal Europe. We studied the density and characteristics of cavities and cavity-bearing trees in three categories of forest in a north-Swedish landscape: clearcuts with tree retention, managed old (>100 years) forest, and unmanaged old forest. Unmanaged old forests had significantly higher mean density of cavities (2.4 +/- 2.2(SD) ha(-1)) than managed old forest (1.1 +/- 2.1 ha(-1)). On clearcuts the mean cavity density was 0.4 +/- 2.3 ha(-1). Eurasian aspen (Populus tremula) had a higher probability of containing excavated cavities than other tree species. There was a greater variety of entrance hole shapes and a higher proportion of cavities with larger entrances in old forest than on clearcuts. Although studies of breeding success will be necessary to more accurately assess the impact of forest management on cavity-nesting birds, our results show reduced cavity densities in managed forest. To ensure future provision of cavities, managers should retain existing cavity-bearing trees as well as trees suitable for cavity formation, particularly aspen and dead trees.
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| 8. |
- Andersson, Kjell, et al.
(författare)
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Green infrastructures and intensive forestry: Need and opportunity for spatial planning in a Swedish rural-urban gradient
- 2013
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 28, s. 143-165
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Tidskriftsartikel (refereegranskat)abstract
- There is a current industrial and societal interest in Europe to further intensify the yield of wood for the forest industry and biomass. At the same time, green infrastructures for ecological and sociocultural values in forest landscapes should be functional. Municipalities have exclusive responsibility for comprehensive planning in Sweden. We modelled the spatial distribution of green infrastructures in terms of three forest types with high ecological values, and three sociotopes with high sociocultural values in 119 municipalities in a ruralurban gradient in Sweden. Forest land without such values should be available for intensive forestry with lower conflict risk. We also estimated the municipalities' potential for physical planning in terms of financial and social capital, and ownership category structure. The area of functional green infrastructures varied considerably among municipalities. Municipalities with a high proportion of functional green infrastructure, thus less available for intensive forestry, were characterised by a stronger tax base, higher population density and lower demographic dependency ratio, and lower proportions of industrial and state forest ownership. We discuss the need for and opportunities of introducing collaborative physical planning to accommodate multiple demands on forest landscapes. We conclude that to accommodate both functional green infrastructures and intensive forestry, a landscape approach including knowledge-based collaboration is needed at multiple-levels of governance and management.
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| 9. |
- Andersson, Mats, et al.
(författare)
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Non-industrial private forest owners' financial risk taking : Does gender matter?
- 2010
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 25, s. 6-13
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Tidskriftsartikel (refereegranskat)abstract
- Male and female non-industrial private forest (NIPF) owners differ in inheritance positions, valuations and forest management style. A survey of Swedish NIPF owners found that male and female owners differ in their willingness to take a financial risk. The preliminary analysis, looking only at gender, revealed no difference in the willingness to take risk. Dividing the population according to dependence on income from forestry, however, showed that female NIPF owners increased their willingness to take financial risk when the dependence of income from forestry changed from insubstantial to notable. Females' tolerance towards risk was also significantly higher than males' at the notable level of dependence of forestry income. Having or not having economic yield as one of the most important objectives of ownership seemed to have a little effect on the willingness to take financial risk; however, the results were further strengthened when adding this dimension. A gender perspective was applied to explain identified differences between male and female forest owners concerning their willingness to take financial risks. Whether these differences emanate from real differences in willingness to take risk, or whether they are effects from other differences in male and female forest ownership, is discussed.
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| 10. |
- Andersson, Solbritt, et al.
(författare)
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Effects of lime (CaCO3) on ectomycorrhizal colonization of Picea abies (L.) Karst. - seedlings planted in a spruce forest
- 1995
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 10:2, s. 149-154
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Tidskriftsartikel (refereegranskat)abstract
- In two consecutive years, seedlings of Norway spruce (Picea abies) were planted in a 50-yr-old Norway spruce forest in limed (3.8 tons CaCO3 ha-1) and control plots. After 6 months they were harvested and the mycorrhizal status of the roots was analysed. Six types of mycorrhiza were distinguished. Three decreased after liming, two increased and one was not affected consistently by the liming. The effects on the total mycorrhizal colonization of the roots were opposite for the two years, indicating that the effects of liming are influenced strongly by other environmental factors. Statistical analysis also revealed pronounced natural variation in space. An inventory of the sporocarp-producing fungi showed that the number of saprotrophic species producing sporocarps was significantly higher in the limed plots whereas the number of ectomycorrhizal species was lower in the limed plots, compared with the control plots. It is concluded that more information is needed concerning the effects of liming on different soil types before any general conclusions can be made about its effects on mycorrhizal colonization.
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| 11. |
- Andersson, Stefan
(författare)
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Soil and soil-solution chemistry after burning a clear-felled area in boreal Sweden
- 2013
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 28, s. 735-745
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Tidskriftsartikel (refereegranskat)abstract
- In Scandinavian forestry, prescribed burning is carried out to promote biodiversity. This study was initiated to examine how burning of a clear-felled area affected the soil and soil-solution chemistry in a nitrogen-limited coniferous forest in boreal Sweden. The stand was clear-felled and the logging residues were left on site. The harvested area was divided into two parts: one part was burnt within three months after clear-felling while the other part was left as a control. Soil and soil-solution samples were collected before and after felling and burning. In the FH layer, pH and the concentration of K and P tended to increase immediately after burning. Six years later, only small effects on soil chemistry were indicated, but the N concentration in the FH layer appeared lower in the burnt area even after 11 years. In the deep soil solution, the total organic carbon concentration was lower in the burnt area than in the unburnt area. The NO3--N concentration in the burnt area peaked at 0.50 mg l(-1) and the mean concentration during the first seven seasons was 0.13 mg l(-1). In the unburnt area, the NO3--N concentration peaked at 3.1 mg l(-1) and the corresponding mean concentration was 1.0 mg l(-1). Although the general level of NO3--N was low in this study, burning largely counteracted the increase in NO3--N concentration that usually follows final felling.
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| 12. |
- Anerud, Erik, et al.
(författare)
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Fuel quality of Norway spruce stumps - influence of harvesting technique and storage method
- 2011
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 26, s. 257-266
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Tidskriftsartikel (refereegranskat)abstract
- The interest in using stump biomass as a biofuel has recently increased in Sweden. The uneven consumption of wood fuel during the year creates a need for storage. This study examined the properties of stump biomass and how they vary at two sites in Sweden depending on harvesting technique, storage method and storage period. Norway spruce stumps, extracted using three different stump harvesting heads (Pallari, Rotary Cutter and Aalto), were stored in windrows or heaps. After 3 months, stumps stored in heaps were gathered into windrows. The fuel quality parameters moisture content (MC), ash content (AC) and calorific value (CV) were evaluated on five occasions in the period May 2008-September 2009. After 16 months of storage, the MC in all treatments had decreased to <25% (wet basis). Average AC decreased from 3.8% to around 1% (dry basis), whereas CV marginally increased. Stumps split during harvesting dried better than those harvested in one piece. The influence of storage method was minimal, although initial storage in heaps allowed better drying in the stumps harvested in one piece. In general, fuel quality improved in all treatments after storage.
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| 13. |
- Appelstrand, Marie
(författare)
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Developments in Swedish forest policy and administration – from a 'policy of restriction' towards a 'policy of cooperation'
- 2012
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 27:2, s. 186-199
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Tidskriftsartikel (refereegranskat)abstract
- New tools and forms of cooperation at the landscape level are needed in order for forestry and environmental conservation to co-exist in areas with many land owners. Awareness has existed for several years in Sweden that cooperation at the landscape level is essential for protecting areas of high environmental value. This awareness has come to expression in several projects and initiatives. One of these projects is the Östra Vätterbranterna Partnership, a successful example of the new orientation towards environmental management as formulated in the government bill Sustainable protection of nature areas: new working methods with a focus on collaboration and increased dialogue by involving more actors and utilizing a greater combination of steering instruments. This development resonates with the growing trend towards deregulation and less state intervention in environmental management, implying a stronger emphasis on new governance structures and market-driven processes. This paper examines the preconditions for a development towards governance-oriented forms of steering in the area of environmental policy and law, with specific emphasis on the protection of forestry areas with high environmental value. Paralleling this development, the transformation of environmental public administration is analyzed, using a model representing three different perspectives on administration’s role, values and meaning, showing state action’s progressive transition from ‘rowing’ to ‘steering’ to ‘serving’ and facilitating.
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| 14. |
- Appelstrand, Marie, et al.
(författare)
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Women entrepreneurship - a shortcut to a more competitive and equal forestry sector?
- 2015
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 30:3, s. 226-234
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Tidskriftsartikel (refereegranskat)abstract
- This article discusses the potential for soft-governance instruments and processes such as the National Gender Equality Strategy to implement a strategy aiming at improved competiveness through gender equality. A central question addressed is how to create a women entrepreneurial identity within the framework of the dominant gender order in the forest sector? The literature review and policy analysis upon which this article is based shows that both structural and individual factors in combination are important for women to be motivated to develop a business in the green sectors. While fully agree with the above, this article takes the discussion one step further by pointing out how policy programs designed to support rural business often have been carried out in a top-down fashion without sufficient knowledge about specific target groups, and have primarily focused on men's businesses within the primary business areas. In order not to be "genderblind," specific support built from the grassroots level with sufficient knowledge about the target group, i.e. women forest owners, is crucial. Several studies also show that in order for programs or strategies with vague effect goals to work, they have to be legitimate and accepted by the stakeholders, which has shown to be one of the most fundamental weaknesses of this type of soft-governance approach. The essential factor is not the goal itself, but rather which tools are available for implementation. Otherwise, this type of soft policy instruments will only work on those who already believe - that is to say, it is seducing the already seduced.
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| 15. |
- Ara, Mostarin, et al.
(författare)
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Regeneration failure of Scots pine changes the species composition of young forests
- 2022
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 37, s. 1445-1457
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Tidskriftsartikel (refereegranskat)abstract
- How seedling mortality and browsing affects species composition of regenerating forests has been mostly studied on a small scale. Yet, large-scale analyses based on extensive data are essential for robust prediction of species composition in young forests. In this study, we used a dataset from a national inventory of young forests (1-4 metres in height) to investigate the species composition of young forests across Sweden. We found that most of the regenerated forest area (almost 90%) was planted with Norway spruce (southern Sweden) and Scots pine (northern Sweden). Regeneration of Norway spruce was generally relatively successful but as a consequence of seedling mortality and browsing, almost 40% of the area regenerated with Scots pine will probably not develop into pine-dominated stands. Thus, low survival of Scots pine seedlings and trees can profoundly change the trajectory of species composition of the young forest from what was originally intended, and a large proportion of the young stands may develop into mixtures of conifers and broadleaves. While such mixtures may benefit certain biodiversity and ecosystem services, a loss of Scots pine dominated stands may also have adverse impacts on the economic returns as well as pine-dependent biodiversity and recreational values.
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| 16. |
- Arhipova, Natalija, et al.
(författare)
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Heart-rot and associated fungi in Alnus glutinosa stands in Latvia
- 2012
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 27, s. 327-336
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Tidskriftsartikel (refereegranskat)abstract
- The interest in Alnus glutinosa (L.) Gaertn. as plantation species has increased during last years, but its prospects should be evaluated from the perspective of forest health. The aims of the present study were to: (1) estimate the incidence of stem decay in Latvian A. glutinosa stands, (2) measure the extent of decay within individual stems and on a stand level and (3) identify decay-causing fungi. In four A. glutinosa stands, 450 trees were randomly sampled with an increment borer and the presence/absence of decay was recorded. As a result, 112 sound-looking and 338 decayed trees were detected, and a corresponding number of wood samples were collected for fungal isolations. A total of 34 stems with decay symptoms were cut to measure the extent of internal decay. The incidence of decayed stems in studied stands was 75.1% on average. The length of the decay column was 7.7 +/- 5.4 m on average, and that of spongy rot was 4.2 +/- 4.5 m on average, implying that yield losses for fully stocked 80-years-old A. glutinosa stand would comprise 49.2% of the total stand volume, and the losses from spongy rot alone -30.5%. In total, 1134 isolates representing 68 fungal taxa were obtained. The most common decay-causing fungi were Inonotus radiatus and Armillaria sp.
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| 17. |
- Arnebrant, Kristina, et al.
(författare)
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Soil microbial activity in eleven Swedish coniferous forests in relation to site fertility and nitrogen fertilization
- 1996
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 11:1, s. 1-6
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Tidskriftsartikel (refereegranskat)abstract
- The effect of forest fertilization on soil microbial activity and biomass was studied in 11 coniferous forests with different site fertility. Soil microbial activity was measured as respiration rate and the microbial biomass was estimated using ATP content and substrate-induced respiration rate (SIR). At all sites, except those with the highest site fertility, the microbial activity and biomass were reduced in the fertilized treatments compared with the control. The general trend indicated that the lower the site fertility, the more pronounced was the reduction of microbial biomass and activity. Some possible explanations for this effect are discussed.
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| 18. |
- Arnerup, Jenny, et al.
(författare)
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Variation in growth of Heterobasidion parviporum in a full-sib family of Picea abies
- 2010
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Ingår i: Scandinavian Journal of Forest Research. - : Taylor & Francis. - 0282-7581 .- 1651-1891. ; 25:2, s. 106-110
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Tidskriftsartikel (refereegranskat)abstract
- Heterobasidion parviporum (Fr.) Niemelä & Korhonen and Heterobasidion annosum (Fr.) Bref. sensu lato are some of the major forest pathogens in the northern hemisphere causing root and butt rot to conifers. The relative susceptibility to H. parviporum was investigated in a full-sib family of Norway spruce [Picea abies (L.) Karst.] by inoculating a set of 252 cloned progenies from a controlled cross. Four ramets of each progeny were used and the 2-year-old rooted cuttings were incubated for 6 weeks under greenhouse conditions. The condition of the cuttings was assessed visually and all the plants were in excellent vigour with no mortality recorded during the experiment. To score the relative susceptibility, lesion length in the inner bark and fungal growth in the sapwood were measured. Among the progenies, significant differences were found for fungal growth in the sapwood (p<0.0005). There was no significant difference for lesion length; however, there was a significant positive correlation between fungal growth and lesion length. The broad-sense heritability was 0.11 for fungal growth. This shows that the genetic component for susceptibility to H. parviporum can be detected even within a full-sib family of Norway spruce and that there is a potential for mapping quantitative trait loci for this trait in Norway spruce.
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| 19. |
- Arora Jonsson, Seema
(författare)
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Particular and wider interests in natural resource management: Organizing together but separately
- 2010
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 25, s. 33-44
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Tidskriftsartikel (refereegranskat)abstract
- The focus that scholars have put on mainstream institutions for resource management, i.e. those recognized by the community and development agents as the primary organizations for resource management, has tended to mask alternative, less visible, but equally robust, organizational forms in which resources are managed and development is carried out at the local level. Mainstream institutions are often inadequate as arenas for negotiating contested interests. By directing attention to women's organizing in contexts in the south (India) and the north (Sweden), it is argued in this paper that although inclusive and heterogeneous structures are essential for the sustainable and equitable management of natural resources such as forests, in order to be able to be so, mainstream institutions need to be able to relate to other structures and forms that are exclusive and represent particular interests. This study of institutional contexts in such different places informs thinking on resource management, development and gender equality, and has practical implications for sustainable and equitable resource management. Importantly, it draws attention to the need to redefine how we study institutions for natural resource management.
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| 20. |
- Attocchi, Giulia, et al.
(författare)
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Crown radius of pedunculate oak (Quercus robur L.) depending on stem size, stand density and site productivity
- 2015
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 30, s. 289-303
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Tidskriftsartikel (refereegranskat)abstract
- Crown size is a good indicator of the growth potential of trees and is often used in forest management for outlining thinning guidelines or constructing forest growth models. The aim of this study was to analyse mean crown radius as a function of stem size, stand density and site productivity in even-aged stands of pedunculate oak (Quercus robur L.). Data included measurements of 620 trees from 53 plots in nine thinning experiments and one operational stand in Sweden, Denmark and Great Britain, representing a wide spectrum of thinning practices ranging from the strictly unthinned control to extremely heavy thinning with essentially solitary trees. Three sets of models were constructed based on different predictor variables, including indicators of individual stem size (diameter at breast height, DBH), stand density/thinning grade (quadratic mean diameter and stand basal area) and site productivity (stand top height). Preliminary results indicated a significant effect of DBH and (nominal) thinning grade on crown radius. The response pattern of the final models indicated an increasing crown radius with increasing DBH, with increasing thinning grade (decreasing stand density) and with decreasing site productivity. The models are valid for predicting the crown radius of pedunculate oak in even-aged forest stands.
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| 21. |
- Backman, Fredrik, 1969-, et al.
(författare)
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Is there a Nordic Model for the treatment of introduced tree species? : A comparison of the use, policy, and debate concerning introduced tree species in the Nordic countries
- 2016
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Ingår i: Scandinavian Journal of Forest Research. - : Taylor & Francis. - 0282-7581 .- 1651-1891. ; 31:2, s. 222-232
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Forskningsöversikt (refereegranskat)abstract
- This article compares the use, policy, and debate concerning introduced tree species in the five Nordic countries (Finland, Sweden, Norway, Denmark, and Iceland). These countries have a long common history and are culturally similar. They are often framed under the benchmark of the Nordic Model or even the Nordic Forestry Model. Therefore, we hypothesize that the Nordic countries' treatment of introduced tree species share common aspects, and that global environmental agreements and international currents in science and policy have reinforced these similarities. The comparison shows that globalization is strong and it seems, at least at a first glimpse, that the Nordic countries follow a kind of Nordic Model in their approach to introduced tree species. However, the history and importance of forestry, ecological conditions, afforestation campaigns, traditions of using introduced trees, understandings, and stakeholder positions have shaped different national and even regional path dependencies and circumstances. This, in turn, has transmuted international policy-making, regulations, and discussions into different specific ways to interpret, control, and implement the use of introduced trees in practice. This article concludes that global environmental agreements and international currents in science and policy adapt to diverse national contexts.
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| 22. |
- Backman, J.S.K., et al.
(författare)
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Increased Nitrification in Acid Coniferous Forest Soil Due to High Nitrogen Deposition and Liming
- 2003
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 18:6, s. 514-524
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Tidskriftsartikel (refereegranskat)abstract
- This study investigated whether liming stimulates the potential nitrification of acid forest soils in southern Sweden, and whether such stimulation (if present) is more pronounced in areas receiving high nitrogen (N) deposition. A short-term (30 h) soil-slurry incubation technique was used, which reduces the risk of bacterial growth, nitrate immobilization and denitrification during the incubation. The nitrate and nitrite produced were measured after biological conversion to nitrous oxide. The investigation was performed 6-7 yrs after the liming at four coniferous forest sites in the central and western parts of southern Sweden, which receive low and high deposition of N, respectively. Overall, liming had increased pH significantly down to 10 cm soil depth, but at 20 cm depth there was no difference between the limed and non-limed soil. In cases when liming had affected the total N pool and the potential nitrification, this was also limited to the uppermost 10 cm. It seems likely that the effects of liming on the potential nitrification were dependent on N availability, which is in turn influenced by N mineralization, trees' demands for N, and atmospheric N inputs. The strongest stimulatory effect of liming on the potential nitrification was seen on the west coast, indicating that these sites had the highest availability of ammonia for nitrifiers. However, liming also increased nitrification at one of the sites in south-central Sweden, which could have been mediated by increased rates of N mineralization.
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| 23. |
- Bakys, Remigijus, et al.
(författare)
-
Root rot, associated fungi and their impact on health condition of declining Fraxinus excelsior stands in Lithuania
- 2011
-
Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 26, s. 128-135
-
Tidskriftsartikel (refereegranskat)abstract
- Dieback of Fraxinus excelsior L. associated with Chalara fraxinea is observed in Europe, and in some areas dying trees exhibit symptoms of root and butt rot. Our study was conducted (1) to estimate the impact of the rot on F. excelsior dieback severity; (2) to identify fungi colonizing roots of dieback-affected trees; (3) to check their pathogenicity to F. excelsior; and (4) to estimate sprouting incidence and sprout health condition in relation to presence/absence of rot. The extent of rot was measured in 33 trees with different dieback intensity, 150 fungal isolations were attempted from roots of 50 trees, 26 fungi were tested for pathogenicity to 286 saplings, and sprouting was evaluated for 328 stumps on three clear-felled sites. Root rot was mainly caused by Armillaria cepistipes, and the extent of rot correlated positively with dieback severity although it played a secondary role in tree decline. Four years after tree felling, root rot had a negative impact on sprouting frequency, yet rot did not enter sprouts from stumps, and when experimentally inoculated, fungi associated with root rot in mature ash had no visible impact on tree vigor, showing that after formation of sprouts, rot does not affect the subsequent phytosanitary condition. Sprouts on investigated sites exhibited Chalara dieback symptoms on leaves and bark irrespectively of presence/absence of rot, indicating that vigorous natural regeneration of F. excelsior in dieback-affected areas could not be expected.
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| 24. |
- Beland Lindahl, Karin, et al.
(författare)
-
Future forests: Perceptions and strategies of key actors
- 2012
-
Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 27, s. 154-163
-
Tidskriftsartikel (refereegranskat)abstract
- Abstract This paper investigates how key actors perceive the future of the forest sector: how they position themselves in relation to climate, energy and demography related trends. Actors’ perceptions of future challenges and opportunities influence their choice of strategy and action. Actors’ relative capacity to realise their visions, in turn, shape future forest use. Frame analysis is used to explore selected actor’s perceptions and strategies and the existence of major divisions, i.e. frame conflicts. Empirically, the study is based on the case of Sweden as a typical boreal forest producing region. Actors’ perceptions of the challenges facing the forest sector diverge widely. Yet, most actors see the future of the forest sector as linked to broader issues of climate mitigation and energy transition. These issues trigger fundamental discussions about social change and the role of forests in future society. A major division separates actors who perceive biomass supply as unlimited, or at least not constraining, and those who stress scarcity and re-distribution of resources. This difference, or frame conflict, is reflected in actors’ forest related strategies and may fuel future forest debates and conflicts
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| 25. |
- Berg, Simon
(författare)
-
Comparison of ground disturbance of frozen peatland during stump harvesting using a stump drill and rake
- 2019
-
Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 34, s. 436-444
-
Tidskriftsartikel (refereegranskat)abstract
- Tree stumps could be a source of renewable energy, contributing to a reduced dependence on fossil fuels. In Finland, stumps are currently harvested when the ground is not frozen to avoid co-removal of large amounts of soil and stones. Hence, the machinery used for stump extraction is not operated year-round. On peatlands, stumps could potentially be harvested when the ground is frozen. However, peatlands are highly sensitive to ground disturbance. There is, therefore, a need to identify equipment that causes low ground disturbance. In this study, peatland ground disturbance at stump level caused by stump harvesting using either a stump drill or a conventional stump rake was evaluated and compared in winter conditions. Results show that the stump drill caused up to 90% less ground disturbance per harvested stump than the conventional stump rake, but harvested 32-53% of the stump wood. Additionally, the size and shape of the disturbed areas changed between the harvesting year and following year, indicating that frost heaving plays a role in filling holes caused by stump extraction. The stump drill also consumed similar time to the conventional stump rake when harvesting Scots pine stumps on mineral soils, but far more when harvesting Norway spruce stumps.
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| 26. |
- Berg, Simon, et al.
(författare)
-
The cost of closed terminals in the supply chain for a potential biorefinery in northern Sweden
- 2020
-
Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 35, s. 165-176
-
Tidskriftsartikel (refereegranskat)abstract
- Establishment of biorefineries for processing forest biomass in the Nordic region is extremely costly due to the high investment, running, and procurement costs. Procurement costs could be reduced by allowing all actors to open access to all available terminals in an area (regardless of ownership) and allowing trucks with higher gross weight. These impacts of changes were evaluated for deliveries of logging residue and energy wood chips to a potential biorefinery, from two suppliers in northern Sweden. Open access to all terminals reduced the terminal-procurement costs by 2-6% and the terminal-to-biorefinery transportation costs by 7-9%. When 74 tonnes trucks were used instead of 60 tonnes, the terminal-to-biorefinery transportation costs were reduced by 4 and 3%, in the current situation and with open access to terminals, respectively. However, the largest effect of open access was that the fraction of short-distance transportation to terminals and train transportation from terminals increased significantly. This indicated that open access to terminals and relatively heavy trucks between terminals and the biorefinery are preferable from both environmental and economic perspectives. Furthermore, the estimated cost saving was adequate and should allow the deliverers to pay a reasonable fee for the use of terminal space.
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| 27. |
- Berg, Simon, et al.
(författare)
-
Torque required to twist and cut loose Scots pine stumps
- 2012
-
Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 27, s. 724-733
-
Tidskriftsartikel (refereegranskat)abstract
- Stump wood is a possible source of renewable energy, but before its potential as a fuel can be utilised to a high degree, new harvesting techniques should be developed to reduce the environmental impact (notably ground disturbance) of harvesting stumps. The forces required to lift and drag stumps out of the soil are known. In this study, two unknown and important parameters were addressed: the torque required to uproot stumps by twisting them and the torque required to cut lateral roots around stumps. A new, improved stump-twisting rig was designed and used in trials with 28 Scots pine (Pinus sylvestris) trees (breast-height diameter over bark, 153-427 mm). The measured torque requirements ranged from 10 to 50 kNm. Twisting stumps required more torque than cutting lateral roots around stumps and the required torque increased with increases in stump size. The results indicate that a wrist on a big feller-buncher, but not a conventional rotator used on forest machines, should be able to generate sufficient torque to cut the roots around stumps such as those used in this study.
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| 28. |
- Berglund, Anders, et al.
(författare)
-
Customer adapted grading of Scots pine sawn timber using a multivariate method
- 2015
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 30:1, s. 87-97
-
Tidskriftsartikel (refereegranskat)abstract
- To define new grading rules, or to customize the ones in use in a rule-based automatic grading system of boards, is a time-consuming job for a sawmill engineer. This has the effect that changes are rarely made. The objective of this study was to continue the development of a method that replaces the calibration of grading rule settings by a holistic-subjective automatic grading, using multivariate models. The objective was also to investigate if this approach can improve sawmill profitability and at the same time have a satisfied customer. For the study, 323 Scots pine (Pinus sylvestris L.) boards were manually graded according to preferences of an important customer. That is, a customer that regularly purchases significant volumes of sawn timber. This manual grading was seen as reference grading in this work. The same boards were also scanned and graded by a rule-based automatic grading system, calibrated for the same customer. Multivariate models for prediction of board grade based on aggregated knot variables, obtained from the scanning, were calibrated using partial least squares regression. The results show that prediction of board grades by the multivariate models were more correct, with respect to the manual grading, than the grading by the rule-based automatic grading system. The prediction of board grades based on multivariate models resulted in 76-87% of the boards graded correctly, according to the manual grading, while the corresponding number was 63% for the rule-based automatic grading system.
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| 29. |
- Berglund, Håkan
(författare)
-
Spatial distribution of dead wood and the occurrence of five saproxylic fungi in old-growth timberline spruce forests in northern Finland
- 2009
-
Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 24, s. 527-540
-
Tidskriftsartikel (refereegranskat)abstract
- Adequate understanding of the factors that determine the establishment and survival of dead-wood-dependent species in natural forests is a prerequisite to the successful maintenance of these species in managed forests. This study investigated the factors affecting the occurrence of five wood-inhabiting polypores in old-growth timberline spruce forests in northern Finland, including the substrate availability and the spatial arrangement of large-diameter logs. The volume of coarse woody debris (CWD) varied significantly between the sites (range 15-30 m3 ha-1), large-diameter logs comprising on average 35% of the total CWD volume. However, the within-site variation in CWD volume was 10-15 times larger than the between-site variation. The spatial distribution of large-diameter logs was aggregated or initially aggregated on four sites and random on one site, creating local patches of high CWD volume. An individual target species occurred on average on 8% of all large-diameter logs, and on 11% of optimal logs (as determined by the decay stage). The characteristics of the logs and stand variables explained partly the occurrence of the target species; furthermore, the mortality pattern of trees (stem breakage versus uprooting) and the presence of primary decomposers also significantly affected the occurrence of the target species. The results indicate that besides substrate availability and quality, local habitat factors and species interactions also play a role in the occurrence of wood-inhabiting fungi in boreal timberline forests.
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| 30. |
- Bergsten, Urban
(författare)
-
Effects of site preparation and reindeer grazing on the early-stage success of Scots pine regeneration from seeds in northern Finland and Sweden
- 2022
-
Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 37, s. 338-351
-
Tidskriftsartikel (populärvet., debatt m.m.)abstract
- The importance of sufficient soil scarification to ensure the regeneration of Scots pine on sub-dry and more fertile sites has been emphasized in many studies. Here we aimed to study, how site preparation intensity affects the early success of natural regeneration and sowing (bare seeds and seed pellets) of Scots pine with or without the reindeer grazing. The study area was located in northern Finland and Sweden where five site preparation methods were compared: unprepared control, logging machine tracks, Huminmix (mixing the mineral soil and organic layer), disc trenching and intensive disc trenching. In each of these we used direct seeding, seed pellets and natural regeneration. Results revealed that even the lightest site preparation methods can provide sufficient regeneration results while the reindeer grazing limits the optimal regeneration result. Huminmix and even the track of the logging machine could provide satisfactory regeneration results both in direct seeding and natural regeneration. This could facilitate the coexistence of forest management, reindeer herding and other land use forms in the same stands and area. The use of seed pellets needs further research, but it may have potential due to lower consumption of seeds and less need for site preparation.
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| 31. |
- Bergström, Dan, et al.
(författare)
-
Comparison of the cost and energy efficiencies of present and future biomass supply systems for young dense forests
- 2014
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 29, s. 793-812
-
Tidskriftsartikel (refereegranskat)abstract
- The objective was to study the effect of future harvesting and handling technologies on the cost and energy efficiency of supply chains for young dense thinnings. The system costs and energy requirements were modeled using type of stands, products delivered, and transport distances as variables. In total, 14 systems were analyzed, of which five represented future systems. The effects of increasing the payloads of off-road and road transportation of whole tree (WT) parts by 10%, 20%, and 30% were also analyzed. If boom-corridor thinning technologies, optimized bundle-harvesters, and loadcompression devices are developed, on average, costs are reduced by 12 compared with present systems. For example, at an average harvested tree size of 22 dm technologies would reduce the cost by up to 15% and the energy requirements by 21%. These effects increase with reduced tree sizes and increased transportation distances. The effects of future technologies are especially significant for tree sizes below 30 dm Thus, there should be increased research and development of boom-corridor felling technology, bundle-harvesters, and load-compression devices.–27% and 11–30% less energy is required when3, the supply of WT using future3, representing a significant part of the potential that could be harvested annually in Sweden.
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| 32. |
- Bergström, Dan, et al.
(författare)
-
Continuous felling of small diameter trees in boom-corridors with a prototype felling head
- 2012
-
Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 27, s. 474-480
-
Tidskriftsartikel (refereegranskat)abstract
- Simulations of the continuous felling of trees in boom-corridors have suggested that it may be possible to increase harvester productivity by a factor of 2.4 when thinning young dense stands. A prototype boom-tip mounted felling head for harvesting in this fashion was therefore built and tested in the field. Using the new head, stands with a density of 10,000 trees ha(-1) and a mean diameter at breast height (dbh) of 7 cm were felled at a speed of 0.4 m s(-1), with an efficiency of 3.5 s tree(-1). The felling speed was limited by the speed of movement of the harvester crane's boom. However, additional tests suggested that the new head could be operated at felling speeds of up to 1.3 m s(-1) when cutting trees with dbh values of up to 8 cm. The simulation that prompted this study focused on multiple felling with the crane in continuous motion at speeds of 1 m s(-1); the results obtained in this work suggest that the new felling head is capable of sustaining these speeds and so further technical development of the design (e.g. to incorporate accumulating functionality) is warranted.
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| 33. |
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| 34. |
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| 35. |
- Birkedal, Maria, et al.
(författare)
-
Rodent impact on establishment of direct-seeded Fagus sylvatica, Quercus robur and Quercus petraea on forest land
- 2009
-
Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 24, s. 298-307
-
Tidskriftsartikel (refereegranskat)abstract
- Seed predation by granivorous rodents constitutes a major problem during reforestation using direct seeding. Acorns or beech nuts were sown at 14 different sites in Denmark and southern Sweden, and seedling establishment was inventoried during the first three growing seasons. Around the time of sowing, rodents were either snap-trapped or live-trapped. At some sites, perches for raptors were installed, and at other sites, signs of predation were investigated or predation was monitored by camera surveillance. Granivorous rodents had a profound negative influence on sowings, and the removal of beech nuts occurred rapidly following sowing. Establishment of oak was better when surroundings consisted of mixed forests rather than broadleaved forests. Fewer rodents were caught, and establishment was better, in large reforestation areas. Rodent captures indicated that forest edges, slash piles and stone wall remains were suitable rodent microhabitats. Snap-trapping or raptor perches did not result in increased oak establishment. Neither sowing in summer nor increased seeding depth decreased predation by rodents on beech nuts. In conclusion, seeds need protection from rodents immediately at the time of sowing. Choosing large regeneration areas combined with removal of suitable rodent habitats seems to be a practical alternative for the development of successful strategies for direct seeding.
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| 36. |
- Bjärstig, Therese, Docent, 1978-, et al.
(författare)
-
A struggling collaborative process : revisiting the woodland key habitat concept in Swedish forests
- 2019
-
Ingår i: Scandinavian Journal of Forest Research. - : Taylor & Francis Group. - 0282-7581 .- 1651-1891. ; 34:8, s. 699-708
-
Tidskriftsartikel (refereegranskat)abstract
- The term woodland key habitat (WKH) was launched in Sweden in 1990. Definitions for the concept have changed over the years, and today the WKH concept and its application are issues of debate in Sweden. Consequently, the Swedish Forestry Agency (SFA) initiated a collaborative process including forest stakeholders with the purpose to clarify the application and develop the inventory methodology of WKH. We have studied, by means of interviews and observations, participant perceptions of how endogenous and exogenous factors affect the collaborative process. During our research, we identified three game changers: the pause in WKH registration in northwestern Sweden that caused several participants to drop out of the process; budget allocations for new nationwide WKH inventories that put the process on hold; and formal instructions from the government that came nine months later and essentially re-initiated the collaborative process. Altogether, this not only affected the participants’ abilities, understanding and willingness to participate, but also the overall legitimacy of the process – indicating the difficulty of conducting policy development in collaborative form, especially when it is highly politicized since it impact on the participants’ anticipation of the process and its end results.
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| 37. |
- Björkdahl, Joakim, 1975, et al.
(författare)
-
Organizational climate and capabilities for innovation: a study of nine forest-based Nordic manufacturing firms
- 2011
-
Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 26:5, s. 488-500
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Tidskriftsartikel (refereegranskat)abstract
- Forest-based manufacturing firms are currently under pressure to achieve higher margins and increased profits. Many firms have tried to maintain profits by cutting costs, however, the effects of this, in markets suffering from overcapacity and declining demand, are temporary. Instead, innovation is seen as being the key to firm growth and sustained profit. This article presents a study of nine large Nordic (Swedish and Norwegian) forest-based manufacturing firms, with operations ranging from pulp and paper chemicals, pulp production, packaging boards, packaging paper, and specialty paper to food processing and packaging solutions. The purpose of this study is to investigate the prerequisites for innovation at firm level in terms of firms' organizational climate and capabilities for innovation, and how these firms could improve their innovation processes. The paper draws on data from a collaborative research project that includes these nine firms, derived from interviews and questionnaires. The results show that forest-based firms are creative and have the potential to be innovative. However, the capabilities for innovation, that is the capabilities to do things differently and to exploit ideas, differ among firms. The study highlights two capabilities that may be obvious but are critical for innovation - management willingness and awareness, and the implementation of a strategy for innovation - and that the potential exists for increased output through appropriate managerial action. © 2011 Taylor & Francis.
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| 38. |
- Björklund, Niklas, et al.
(författare)
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Erroneous conclusions about current geographical distribution and future expansion of forest insects in Northern Sweden: comments on Hof and Svahlin (2015)
- 2016
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 31, s. 126-127
-
Tidskriftsartikel (refereegranskat)abstract
- We question the validity of the results and the conclusions from a study entitled The potential effect of climate change on the geographical distribution of insect pest species in the Swedish boreal forest that was recently published in Scandinavian Journal of Forest Research. The main problem is that for several of the species the current geographical distributions presented in the paper (based on modeling of a limited set of occurrence data) are vastly underestimated compared with distribution maps in standard reference literature and other available occurrence data. As a consequence of that the predicted major future range expansions of these important pest species are also erroneous.
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| 39. |
- Bohlin, Jonas, et al.
(författare)
-
Deciduous forest mapping using change detection of multi-temporal canopy height models from aerial images acquired at leaf-on and leaf-off conditions
- 2016
-
Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 31, s. 517-525
-
Tidskriftsartikel (refereegranskat)abstract
- Discrimination of deciduous trees using spectral information from aerial images has only been partly successfully due to the complexity of the reflectance at different view angles, times of acquisition, phenology of the trees and inter-tree radiance. Therefore, the objective was to evaluate the accuracy of estimating the proportion of deciduous stem volume (P) utilizing change detection between canopy height models (CHMs) generated by digital photogrammetry from leaf-on and leaf-off aerial images instead of using spectral information. The study was conducted at a hemiboreal study area in Sweden. Using aerial images from three seasons, CHMs with a resolution of approximately 0.5 m were generated using semi-global matching. For training plots, metrics describing the change between leaf-on and leaf-off conditions were calculated and used to model the continuous variable P, using the Random Forest approach. Validated at sub-stands, the estimation accuracy of P in terms of root mean square error and bias was found to be 18% and −6%, respectively. The overall classification accuracy, using four equally wide classes, was 83% with a kappa value of 0.68. The validation plots in classes of high proportion of coniferous or deciduous stem volume were well classified, whereas the mixed forest classes showed lower classification accuracies.
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| 40. |
- Bohlin, Jonas, et al.
(författare)
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Forest variable estimation using photogrammetric matching of digital aerial images in combination with a high-resolution DEM
- 2012
-
Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 27, s. 692-699
-
Tidskriftsartikel (refereegranskat)abstract
- The rapid development in aerial digital cameras in combination with the increased availability of high-resolution Digital Elevation Models (DEMs) provides a renaissance for photogrammetry in forest management planning. Tree height, stem volume, and basal area were estimated for forest stands using canopy height, density, and texture metrics derived from photogrammetric matching of digital aerial images and a high-resolution DEM. The study was conducted at a coniferous hemi-boreal site in southern Sweden. Three different data-sets of digital aerial images were used to test the effects of flight altitude and stereo overlap on an area-based estimation of forest variables. Metrics were calculated for 344 field plots (10 m radius) from point cloud data and used in regression analysis. Stand level accuracy was evaluated using leave-one-out cross validation of 24 stands. For these stands the tree height ranged from 4.8 to 26.9 m (17.8 m mean), stem volume 13.3 to 455 m3 ha-1 (250 m3 ha-1 mean), and basal area from 4.1 to 42.9 m2 ha-1 (27.1 m2 ha-1 mean) with mean stand size of 2.8 ha. The results showed small differences in estimation accuracy of forest variables between the data-sets. The data-set of digital aerial images corresponding to the standard acquisition of the Swedish National Land Survey (Lantma¨teriet), showed Root Mean Square Errors (in percent of the surveyed stand mean) of 8.8% for tree height, 13.1% for stem volume and 14.9% for basal area. The results imply that photogrammetric matching of digital aerial images has significant potential for operational use in forestry.
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| 41. |
- Boman, Mattias, et al.
(författare)
-
The hunting value of game in Sweden: Have changes occurred over recent decades?
- 2012
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 27, s. 669-674
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Tidskriftsartikel (refereegranskat)abstract
- This short communication deals with the hunting value of all game in Sweden, specifically changes over time in value and value components, and differences between the northern and southern parts of the country. The investigation was based on two mail surveys, one conducted in 1987 and the other in 2006. The results suggested that the gross hunting value and the hunting cost share of this value increased over the two decades. The consumer surplus (net value) share decreased correspondingly, while the recreation share and the meat share of the hunting value were more stable over time. It appeared that in 1987 as well as in 2006 the southern Swedish hunters tended to value their hunting higher than the hunters in northern Sweden, especially when it came to the recreation. The results should be relevant in the context of game management, adaptive game management in particular.
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| 42. |
- Bostedt, Göran, 1966-, et al.
(författare)
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An Empirical Model for Forest Landscape Planning and its Financial Consequences for Landowners
- 2021
-
Ingår i: Scandinavian Journal of Forest Research. - : Taylor & Francis. - 0282-7581 .- 1651-1891. ; 36:7-8, s. 626-638
-
Tidskriftsartikel (refereegranskat)abstract
- Despite well-formulated goals for environmental protection in the forestry sector, the biodiversitycrisis remains. Protected habitats are often small, isolated and lack continuity. We studied forestplanning at a landscape scale as a method to increase habitat connectivity, and improveconservation values whilst maintaining high levels of forest production. We assessed the financialimpacts of landscape planning for the landowners, and present a fee-fund system to solveunequal burdens among them. As case studies, we used three landscapes along a latitudinalgradient in Sweden. The results demonstrate some variation between the landscapes in terms ofthe total cost for set asides and large differences in terms of the financial impact per landowner.Our conclusion is that forest landscape planning may be a way forward to improve conservationefforts, but given the variation in financial impacts, we propose to combine landscape planningwith economic tools for compensation.
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| 43. |
- Bostedt, Göran, 1966-, et al.
(författare)
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Increasing Forest Biomass Supply in Northern Europe – Countrywide Estimates and Economic Perspectives
- 2016
-
Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 31:3, s. 314-322
-
Tidskriftsartikel (refereegranskat)abstract
- Woody biomass is the largest source of renewable energy in Europe, and the expected increase in demand for wood for energy purposes was the stimulus for writing this paper. Opportunities to increase the supply of forest biomass in the short and long term are discussed, as well as environmental side effects of intensive forest management. Focusing on northern Europe, national estimates of potential annual fellings and the corresponding potential amounts, simulated by the European Forest Information Scenario model, are then presented, as well as reported fellings. For the region as a whole, there seems to be substantial unused biophysical potential, although recent data from some countries indicate underestimated annual felling rates. We argue that an economic perspective is lacking in the debate about wood production for energy purposes in Europe and harvest potentials, and we discuss the effects of biophysical capacity limits in forest yield from a partial equilibrium perspective. Using a larger proportion of the biophysical potential in northern Europe than at present will entail trade-offs with environmental and social values, which means that strategies are needed to protect and account for the benefits and costs of all forms of ecosystem services.
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| 44. |
- Brandt, P. H., et al.
(författare)
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"Profitability is sustainability:" framing of forest management practices by the Swedish forest industry
- 2023
-
Ingår i: Scandinavian Journal of Forest Research. - : Taylor & Francis. - 0282-7581 .- 1651-1891. ; 38:7/8, s. 429-441
-
Tidskriftsartikel (refereegranskat)abstract
- This article investigates how the Swedish forest industry, as represented by the three largest Swedish private forest companies (Svenska Cellulosa AB, Stora Enso, and Holmen), through their main public relations (PR) channels frame the current dominant Swedish forestry model and alternative models that are promoted by the European Union (EU). The content analysis of the three companies' trade magazines published between 2019 and 2022 explores the patterns in the PR framing of the forest management models with respect to economic, environmental, and social aspects. The time interval is centered by the July 2021 announcement of the EU's new Forest Strategy for 2030. The magazines' target audience is private forest owners, from whom Svenska Cellulosa AB, Stora Enso, and Holmen buy 40-50% of the timber used in production. The main finding of the study is that these corporations did not present alternative methods as viable options to replace the Swedish forestry model. The magazines, with some individual variations, respond to the alternative methods promoted by the EU and environmental associations by an increased emphasis on the benefits, mainly environmental, of the Swedish forestry model - framing the model as not only the most profitable but also the most ecologically sustainable.
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| 45. |
- Brandtberg, Per-Olov, et al.
(författare)
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Effects of wood ash, green residues and N-free fertiliser on naturally regenerated birch and field vegetation in a young Norway spruce stand in SW Sweden
- 2021
-
Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 36, s. 364-373
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Tidskriftsartikel (refereegranskat)abstract
- Treatments added to young conifer stands aiming to compensate for the loss of nutrients and alkalinity associated with whole-tree harvesting for bioenergy purposes have the potential to affect the growth of competitors to the conifers. Three different nutrient compensation treatments were applied to a young Picea abies (L.) Karst. stand in south-west Sweden, 2 or 3 years following final felling. The treatments were; fine fraction of harvest residues (15 Mg dw ha(-1)); granulated wood ash (4.1 Mg dw ha(-1)); nitrogen-free vitality fertiliser (twice 1.5 Mg ha(-1)); untreated control. Root biomass and total biomass of graminoids (mainly Deschampsia flexuosa (L.) Trin) were significantly greater in the wood ash and vitality fertiliser treatments than in the residues and control treatments. The aboveground and coarse root biomass of naturally regenerated birch (Betula spp.) and the aboveground biomass of dwarf shrubs (mainly Calluna vulgaris (L.) Hull.) and bottom layer were not affected by the treatments. Calcium and magnesium concentrations in the aboveground biomass of graminoids and phosphorus concentration in the biomass of bottom layer were significantly the highest in the vitality fertiliser treatment. Thus, nutrient compensation with vitality fertiliser or granulated wood ash may increase competition from graminoids in the establishment phase.
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| 46. |
- Brege, Staffan, et al.
(författare)
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Value-added strategies and forward integration in the Swedish sawmill industry: positioning and profitability in the high-volume segment
- 2010
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 25:5, s. 482-493
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Tidskriftsartikel (refereegranskat)abstract
- The changing market conditions for the Swedish sawmill industry place a focus on a better understanding of the pros and cons of value-added and forward integration strategies. The purpose of this article is to describe and explain recent value-added strategies in the Swedish sawmill industry. The study includes strategies from 13 of the 15 largest sawmill companies for the period between 2002 and 2005, describing a differentiation between value added in primary sawmill production and forward integration into secondary production. It also aims to relate some basic conditions, such as company size, company growth and corporate strategy, to value added and forward integration to profitability. The results show strong positive and significant correlations between forward integration, value added in primary production (somewhat weaker) and unit revenue, and profitability measured as return on investment. There were no strong or significant correlations between size and profitability, playing down the importance of economies of scale (among these already large companies). An interesting result is the much higher profitability of the buying sawmill companies compared with the forest corporations, stressing the importance of both a long-term strategy when investing in value-added activities and ultimately the priorities of ownership.
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| 47. |
- Brukas, Vilis
(författare)
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Forest owner is more than her goal: a qualitative typology of Lithuanian owners
- 2015
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 30, s. 478-491
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Tidskriftsartikel (refereegranskat)abstract
- In contrast to quantitative surveys up to date, this study employs in-depth interviews and qualitative analyses aiming to provide detailed contextualized portrayals of private forest owners (PFOs) in Lithuania, where forest ownership underwent crucial changes in the last two decades. We scrutinized narrations of 18 owners, focusing on the background and goals of forest possession, actually applied management practices and informants' future plans. Content analysis of the narrations revealed three classes of goals: ideational rationale, i.e. immaterial justification for owning and managing forest, financial goals referring to monetary benefits from selling forest products and own material use for household needs. Reported practices differ widely among PFOs, ranging from largely absent management to intensive silvicultural regimes. Syntheses of each informant's goals and practices enabled discerning four types of PFOs. Forest Businessmen typically own largest estates (>100 ha) and regard forest as an investment to get long-term financial benefits; they resort to forest management for timber and often intend to enlarge their possessions. Household Foresters primarily use timber for own needs, regularly applying selective tree cutting; such forestry results in frequent but small-scale management interventions. Passive Forest Lovers aspire for recreational or environmental values, being largely uninterested in timber harvesting. Ad Hoc Owners usually are small scale, have vague goals and rarely engage in forest management. The study concludes with discussing policy implications of the identified diversity of PFOs.
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| 48. |
- Brukas, Vilis, et al.
(författare)
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Forests in a bioeconomy: bridge, boundary or divide?
- 2017
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 32, s. 582-587
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Tidskriftsartikel (refereegranskat)abstract
- Bioeconomy is an emerging concept that is gaining momentum both in science and policy. Within the forest sector, the bioeconomy discourse is already shaping the international forest policy debate. Given the sector's importance for the national economy, this study investigates the perceptions of bioeconomy by forest owners, forest industry and ENGOs in Sweden. Drawing on cognitive and ideological dimensions of political bargaining, we analyse to which extent the bioeconomy serves as a bridging concept, a dividing concept or a boundary object. The results show that the bioeconomy is a broadly accepted concept, perceived as a natural extension of the Swedish forestry model. Results indicate that bioeconomy is well aligned with the key characteristics of a boundary object, that is, serving specific interests of different forest stakeholders under the generally accepted conceptual umbrella. We did not identify dividing effects of any substance. On the contrary, the interviews provide a strong indication that bioeconomy serves the Swedish forest sector as a bridging concept that brings closer rather than antagonises the different actors.
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| 49. |
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| 50. |
- Bryngemark, Elina, 1987-
(författare)
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Bioenergy versus forest conservation : a partial equilibrium analysis of the Swedish forest raw materials market
- 2020
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Ingår i: Scandinavian Journal of Forest Research. - : Taylor & Francis. - 0282-7581 .- 1651-1891. ; 35:7, s. 367-382
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Tidskriftsartikel (refereegranskat)abstract
- This paper presents an economic assessment of two different policies – both implying an increased demand for forest ecosystem services – and how these could affect the competition for forest raw materials. A forest sector trade model is updated to a new base year (2016), and then employed to analyze the consequences of a more intense use of bioenergy and increased forest conservation in Sweden. These scenarios are assessed individually and in combination. A particularly interesting market impact is that bioenergy promotion and forest conservation tend to have opposite effects on forest industry by-product prices. Moreover, combining the two policies mitigates the forest industry by-product price increase compared to the case where only the bioenergy-promoting policy is implemented. Namely, the energy using sector (heat and power) is less negatively affected in terms of increased feedstock prices if bioenergy demand targets are accompanied by increased forest conservation. This effect is due to increasing pulpwood prices, which reduces pulp, paper and board production, and in turn mitigates the competition for the associated by-products. Overall, the paper illustrates the complexity of the forest raw material market, and the importance of considering demand and supply responses within and between sectors in energy and forest policy decision-making.
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