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  • 1.
    Aaby, Susanne
    et al.
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology. 1991.
    Carlsson, Henric
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Effektivisering av timmerplan på Kinnaredsågen2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Sågverken i Sverige letar kontinuerligt efter lösningar för att kunna effektivisera produktionen. I denna studie analyseras specifikt Derome Kinnareds sågens timmerplan. Genom en stopptidsanalys, undersökningar av nya tekniska lösningar, muntliga kommunikationer med personal samt arbetsledare och andra företag införskaffades underlag till analys. Åtgärder som kan utföras för att minimera produktionskostnaderna eller öka produktionen på timmerplan är att implementera ny teknik t.ex. fjärrmätning, digitalisera mätbesked med hjälp av SDC:s arkiv, omorganisera personalstyrkan samt införskaffa bemyndigad mätare. Förslagen indikerar att implementering av dem kan förbättra Kinnaredsågens ekonomi. Beroende på hur mycket företaget är villigt att investera kan det effektiviseras i olika grad. I samband med kommunikation med företagsrepresentanter kom man dock fram till att ny teknik kan vara bättre att implementera vid en nybyggnation.

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  • 2.
    Abbas, Nadeem
    et al.
    Linnaeus University, Faculty of Technology, Department of computer science and media technology (CM).
    Awais, Mian Muhammad
    Lahore University of Management Sciences, Pakistan.
    Kurti, Arianit
    Linnaeus University, Faculty of Technology, Department of computer science and media technology (CM).
    Smart Forest Observatories Network: A MAPE-K Architecture Based Approach for Detecting and Monitoring Forest Damage2023In: Proceedings of the Conference Digital solutions for detecting and monitoring forest damage: Växjö, Sweden, March 28-29, 2023, 2023Conference paper (Other academic)
    Abstract [en]

    Forests are essential for life, providing various ecological, social, and economic benefits worldwide. However, one of the main challenges faced by the world is the forest damage caused by biotic and abiotic factors. In any case, the forest damages threaten the environment, biodiversity, and ecosystem. Climate change and anthropogenic activities, such as illegal logging and industrial waste, are among the principal elements contributing to forest damage. To achieve the United Nations' Sustainable Development Goals (SDGs) related to forests and climate change, detecting and analyzing forest damages, and taking appropriate measures to prevent or reduce the damages are essential. To that end, we envision establishing a Smart Forest Observatories (SFOs) network, as shown below, which can be either a local area or a wide area network involving remote forests. The basic idea is to use Monitor, Analyze, Plan, Execute, and Knowledge (MAPE-K) architecture from autonomic computing and self-adaptive software systems domain to design and develop the SFOs network. The SFOs are planned to collect, analyze, and share the collected data and analysis results using state-of-the-art methods. The principal objective of the SFOs network is to provide accurate and real-time data to policymakers and forest managers, enabling them to develop effective policies and management strategies for global forest conservation that help to achieve SDGs related to forests and climate change.

  • 3. Abbasi, Umar Aftab
    et al.
    Mattsson, Eskil
    IVL Swedish Environmental Research Institute.
    Nissanka, Sarath Premalal
    Ali, Arshad
    Biological, structural and functional responses of tropical forests to environmental factors2022In: Biological Conservation, ISSN 0006-3207, E-ISSN 1873-2917, Vol. 276, p. 109792-109792, article id 109792Article in journal (Refereed)
    Abstract [en]

    Here, we hypothesize that the biological, structural and functional attributes of tropical forests respond to water-related climatic and soil nutrient-related factors.

    Thus, we quantified 27 forest attributes and 20 environmental factors across 189 plots of Sri Lankan tropical forests. Our results suggest that environmental conditions were characterized by both water-related and temperature-related factors, and as such, both coarse-textured and compacted-structured soils determined soil conditions.

    Forest conditions were characterized by high species-functional diversity, structural complexity and aboveground biomass-related functions. We found strong positive effects of water-related climatic factors followed by temperature-related climatic factors but negligible positive to negative effects of textured-related and nutrient-related soil factors on most of the biological, structural and functional attributes.

    Overall the biodiversity and carbon stocks of Sri Lankan tropical forests are likely to increase with water-energy balance and improved soil conditions, and thus, studied forests could offset a substantial quantity of anthropogenic carbon emissions to achieve carbon neutrality which can have both regional and global significance if protected from anthropogenic disturbances. 

  • 4. Abbasi, Umar Aftab
    et al.
    Mattsson, Eskil
    IVL Swedish Environmental Research Institute.
    Nissanka, Sarath Premalal
    Ali, Arshad
    Species α-diversity promotes but β-diversity restricts aboveground biomass in tropical forests, depending on stand structure and environmental factors2022In: Journal of Forestry Research, ISSN 1007-662X, E-ISSN 1993-0607Article in journal (Refereed)
    Abstract [en]

    Forest plays a vital role in the global biogeochemical cycles through a high rate of carbon sequestration and harboring biodiversity. However, local species diversity is declining while also becoming increasingly homogenized across communities. Although effects of local biotic processes (e.g., species α-diversity and stand structural heterogeneity) and environmental factors on aboveground biomass (AGB) have been widely tested, there is a huge knowledge gap for the effect of regional biotic processes (i.e., taxonomic and functional β-diversity) in forests. Here, we hypothesized that regional and local environmental factors along with biotic processes jointly regulate AGB through species shifts in tropical forests.

    Using piecewise structural equation modeling (pSEM), we linked climatic water availability, soil fertility, stand structural heterogeneity (either tree DBH inequality, height inequality, or stand density), species α-diversity, taxonomic or functional β-diversity (and its two components; β-turnover and β-richness), and AGB across 189 inventory plots in tropical forests of Sri Lanka. Soil fertility and climatic water availability shaped local and regional biotic processes. Stand structural heterogeneity promoted species α-diversity but declined β-diversity (but increased β-taxonomic turnover). Species α-diversity and stand structural heterogeneity promoted AGB whereas taxonomic and functional β-diversity declined (but β-taxonomic turnover increased) AGB.

    The relationships of AGB with species α-diversity and β-diversity varied from significant to nonsignificant positive depending on the specific combinations of stand structural heterogeneity metrics used. This study shows that local biotic processes could increase AGB due to the local and regional niche complementarity effect whereas the regional biotic processes could restrict AGB due to the regional selection or functional redundancy effect under favorable environmental conditions. We argue that biotic homogenization, as well as drought conditions, may have strong divergent impacts on forest functions and that the impacts of tree diversity loss may greatly reduce carbon sequestration.

  • 5.
    Abrahamsson, Håkan
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Skogstillståndet på ön Blå Jungfrun2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The aim of the study was to investigate the forest in the national park on the Blue Maiden Island and compare with mainland forest data. The study was made in a quantitative way. The results from the field measurement were related to data from the Swedish National Forest Inventory.

    Oak, Scots pine and Lime were the most common tree species and constituted 47, 18 and 16 % of basal area, respectively, on the island.

    The mean heigt was 7 m and the volume of living trees was on average 72 m³/ha and dead wood 30 m³/ha. The average age at breast height was 137 years and the oldest tree was an oak with the age of 335 years at breast height. The amount of dead wood constituted 40 % of the total volume. Disturbances have had influence on the forest on the Island. To what extent cannot be determined without further investigations.

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  • 6.
    Ackerfors, Viktoria
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Vilken inställning har Länsstyrelserna till naturvårdsbränningar i områden med fornlämningar och övriga kulturhistoriska lämningar?2020Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Skogsbränderna har en stor betydelse för den biologiska mångfalden. Det brandpåverkade landskapet och dess dynamik skapar viktiga substrat och livsmiljöer för många pyrofila arter. På grund av att skogsbränderna har minskat i antal sedan 1800-talet, har kontrollerade naturvårdsbränningar utförts som ett komplement för dessa sedan 1980-talet. De kontrollerade naturvårdsbränningarna skapar de miljöer och substrat som många arter är beroende av. Eftersom tidigare mänsklig verksamhet satt prägel på skogarna återfinns idag ett stort antal fornlämningar och övriga kulturhistoriska lämningar i skogsmarkerna. Det är en utmaning att utföra naturvårdsbränningarna så att dessa lämningar inte skadas. Det råder också en brist på tydliga riktlinjer om hur Länsstyrelserna ska förhålla sig till naturvårdsbränningar i områden med lämningar. Denna studies syfte var att undersöka vilken inställning Länsstyrelserna har till naturvårdsbränningar i områden med fornlämningar eller övriga kulturhistoriska lämningar.

    Nyckelord: Naturvårdsbränningar, fornlämningar, övriga kulturhistoriska lämningar, Länsstyrelsen

    Keyword: Prescribed burnings, ancient remains, other cultural-historical remains, County Administrative Boards

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  • 7.
    Adamopoulos, Stergios
    Technological Educational Institute of Larissa, Greece.
    Νέες τεχνολογίες συγκοµιδής δασικών προϊόντων: [New technologies for harvesting forest products]2012In: "Harvesting, Supply and Trade of Woody Biomass". Centre for Renewable Energy Sources and Saving (CRES) and Department of Forestry and Management of Natural Environment, TEI of Larissa, 19 October 2012, Karditsa, Greece, 2012Conference paper (Other academic)
  • 8.
    Adjei, Prince Osei-Wusu
    et al.
    Department of Geography and Rural Development, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
    Agyei, Frank Kwaku
    Department of Silviculture and Forest Management, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
    Adjei, Joyce Osei
    Department of Agricultural Economics, Agribusiness and Extention, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
    Decentralized forest governance and community representation outcomes: analysis of the modified taungya system in Ghana2020In: Environment, Development and Sustainability, ISSN 1387-585X, E-ISSN 1573-2975, Vol. 22, p. 1187-1209Article in journal (Refereed)
  • 9. Adolf, Carole
    et al.
    Wunderle, Stefan
    Colombaroli, Daniele
    Weber, Helga
    Gobet, Erika
    Heiri, Oliver
    van Leeuwen, Jacqueline F. N.
    Bigler, Christian
    Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
    Connor, Simon E.
    Galka, Mariusz
    La Mantia, Tommaso
    Makhortykh, Sergey
    Svitavska-Svobodova, Helena
    Vanniere, Boris
    Tinner, Willy
    The sedimentary and remote-sensing reflection of biomass burning in Europe2018In: Global Ecology and Biogeography, ISSN 1466-822X, E-ISSN 1466-8238, Vol. 27, no 2, p. 199-212Article in journal (Refereed)
    Abstract [en]

    Aim: We provide the first European-scale geospatial training set relating the charcoal signal in surface lake sediments to fire parameters (number, intensity and area) recorded by satellite moderate resolution imaging spectroradiometer (MODIS) sensors. Our calibration is intended for quantitative reconstructions of key fire-regime parameters by using sediment sequences of microscopic (MIC from pollen slides, particles 10-500 mu m) and macroscopic charcoal (MAC from sieves, particles > 100 mu m). Location: North-south and east-west transects across Europe, covering the mediterranean, temperate, alpine, boreal and steppe biomes. Time period: Lake sediments and MODIS active fire and burned area products were collected for the years 2012-2015. Methods: Cylinder sediment traps were installed in lakes to annually collect charcoal particles in sediments. We quantitatively assessed the relationships between MIC and MAC influx (particles/cm(2)/year) and the MODIS-derived products to identify source areas of charcoal and the extent to which lake-sediment charcoal is linked to fire parameters across the continent. Results: Source area of sedimentary charcoal was estimated to a 40-km radius around sites for both MIC and MAC particles. Fires occurred in grasslands and in forests, with grass morphotypes of MAC accurately reflecting the burned fuel-type. Despite the lack of local fires around the sites, MAC influx levels reached those reported for local fires. Both MIC and MAC showed strong and highly significant relationships with the MODIS-derived fire parameters, as well as with climatic variation along a latitudinal temperature gradient. Main conclusions: MIC and MAC are suited to quantitatively reconstructing fire number and fire intensity on a regional scale. However, burned area may only be estimated using MAC. Local fires may be identified by using several lines of evidence, e.g. analysis of large particles (> 600 mu m), magnetic susceptibility and sedimentological data. Our results offer new insights and applications to quantitatively reconstruct fires and to interpret available sedimentary charcoal records.

  • 10.
    Adusei-Fosu, Kwasi
    et al.
    Scion, New Zealand.
    Rolando, Carol A.
    Scion, New Zealand.
    Richardson, Brian
    Scion, New Zealand.
    van Leeuwen, Rebecca
    Scion, New Zealand;Plant Protection Chemistry NZ Ltd, New Zealand.
    Gaskin, Robyn
    Plant Protection Chemistry NZ Ltd, New Zealand.
    Bader, Martin K.-F.
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology. Auckland Univ Technol AUT, New Zealand.
    Pathan, Amin K.
    Minist Primary Ind, New Zealand.
    Evaluating the efficacy of potential fungicide-adjuvant combinations for control of myrtle rust in New Zealand2021In: Journal of Plant Diseases and Protection, ISSN 1861-3829, E-ISSN 1861-3837, Vol. 128, p. 1501-1515Article in journal (Refereed)
    Abstract [en]

    Myrtle rust is a serious fungal disease caused by Austropuccinia psidii affecting a number of Myrtaceae species in New Zealand and elsewhere. Control with fungicides or biologicals provides a mechanism to reduce the build-up of inoculum in the short-term while other strategies are being developed or deployed for long-term management. This study evaluated the efficacy of fungicides for control of myrtle rust under controlled conditions and identified adjuvants that would promote spreading of fungicidal active ingredients across the leaf surface. The spread of fungicide on detached M. excelsa leaves was assessed by applying three different adjuvants in combination with seven fungicides. Subsequently, M. excelsa plants were treated with three fungicides/mixes, (azoxystrobin + epoxiconazole, triademinol or a natural tea-extract) at a single rate followed by inoculation with A. psidii urediniospores on day 0, 7, 14 or 21 days after spraying. The response to infection in M. excelsa plants based on different inoculation timings at days 0, 7 and 21 significantly differed among fungicide treatments. The fungicide azoxystrobin + epoxiconazole was the most effective with infections significantly lower on the adaxial leaf surface than abaxial, despite good surface coverage of fungicide being achieved on both leaf surfaces. There were significant differences among fungicides based on the proportion of infected leaves on M. excelsa plants. Day 21 post-spray inoculation indicated a significant interaction between inoculation time and fungicide on leaf disease ratings. However, this was not the case at either 28 or 35 days post-inoculation. This research contributes to fungicide options for myrtle rust control in New Zealand.

  • 11.
    Agostinelli, Marta
    et al.
    Swedish University of Agricultural Sciences, Sweden.
    Cleary, Michelle
    Swedish University of Agricultural Sciences, Sweden.
    Martín, Juan A
    Technical University of Madrid, Spain.
    Albrectsen, Benedicte R
    Umeå University, Sweden.
    Witzell, Johanna
    Swedish University of Agricultural Sciences, Sweden.
    Pedunculate Oaks (Quercus robur L.) Differing in Vitality as Reservoirs for Fungal Biodiversity2018In: Frontiers in Microbiology, E-ISSN 1664-302X, Vol. 9, article id 1758Article in journal (Refereed)
    Abstract [en]

    Ecological significance of trees growing in urban and peri-urban settings is likely to increase in future land-use regimes, calling for better understanding of their role as potential reservoirs or stepping stones for associated biodiversity. We studied the diversity of fungal endophytes in woody tissues of asymptomatic even aged pedunculate oak trees, growing as amenity trees in a peri-urban setting. The trees were classified into three groups according to their phenotypic vitality (high, medium, and low). Endophytes were cultured on potato dextrose media from surface sterilized twigs and DNA sequencing was performed to reveal the taxonomic identity of the morphotypes. In xylem tissues, the frequency and diversity of endophytes was highest in oak trees showing reduced vitality. This difference was not found for bark samples, in which the endophyte infections were more frequent and communities more diverse than in xylem. In general, most taxa were shared across the samples with few morphotypes being recovered in unique samples. Leaf phenolic profiles were found to accurately classify the trees according to their phenotypic vitality. Our results confirm that xylem is more selective substrate for endophytes than bark and that endophyte assemblages in xylem are correlated to the degree of host vitality. Thus, high vitality of trees may be associated with reduced habitat quality to wood-associated endophytes.

  • 12.
    Agostinelli, Marta
    et al.
    Swedish University of Agricultural Sciences, Sweden.
    Nguyen, Diem
    Uppsala University, Sweden.
    Witzell, Johanna
    Swedish University of Agricultural Sciences, Sweden.
    Cleary, Michelle
    Swedish University of Agricultural Sciences, Sweden.
    Mycobiome of Fraxinus excelsior With Different Phenotypic Susceptibility to Ash Dieback2021In: Frontiers in Forests and Global Change, E-ISSN 2624-893X, Vol. 4, article id 580514Article in journal (Refereed)
    Abstract [en]

    For the last two decades, large-scale population decline of European ash (Fraxinus excelsior) has occurred in Europe because of the introduction of the alien fungal pathogen, Hymenoscyphus fraxineus, from East Asia. Since European ash is a keystone species having critical importance for biodiversity, and only a small percentage of the ash population appears to show some tolerance against the pathogen, the loss of ash trees means that other associated organisms, especially those with high or obligate associations to ash, are at risk of further species declines. In this study, we used high throughput DNA sequencing and multivariate analysis to characterize: (i) the mycobiome in aerial tissues (i.e., leaf, bark, and xylem) of ash trees showing different phenotypic response to ash dieback, (ii) the temporal variation in fungal communities across the growing season, and (iii) the similarity in fungal community structure between ash and other common trees species that may serve as an ecological niche substitute for ash microfungi. Results showed that fungal communities differed among the three tissue types, susceptibility classes, in time and between sites. Trophic analysis of functional groups using the FUNGuild tool indicated a higher presence of pathotrophic fungi in leaves than in bark and xylem. The share of pathotrophic fungi increased along a gradient of low to high disease susceptibility in both bark and xylem tissue, while the proportion of symbiotrophic fungi correspondingly decreased in both tissue types. Neighboring, alternative host trees did not share all the fungal species found in ash, however, most microfungi uniquely associated to ash in this study are generalists and not strictly host specific. The progressive disappearance of ash trees on the landscape imposes a high risk for extinction of Red-listed macrofungal species, and breeding for resistance against ash dieback should help sustain important biodiversity associated to ash. Microfungal diversity though may be less prone to such demise since most ash-associated endophytes appear to occur on a broad range of host species.

  • 13.
    Agostinelli, Marta
    et al.
    Southern Swedish Forest Research Centre, Swedish University of Agricultural Sciences, Alnarp, Sweden.
    Nguyen, Diem
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Systematic Biology.
    Witzell, Johanna
    Southern Swedish Forest Research Centre, Swedish University of Agricultural Sciences, Alnarp, Sweden.
    Cleary, Michelle
    Southern Swedish Forest Research Centre, Swedish University of Agricultural Sciences, Alnarp, Sweden.
    Mycobiome of Fraxinus excelsior With Different Phenotypic Susceptibility to Ash Dieback2021In: Frontiers in Forests and Global Change, E-ISSN 2624-893X, Vol. 4, article id 580514Article in journal (Refereed)
    Abstract [en]

    For the last two decades, large-scale population decline of European ash (Fraxinus excelsior) has occurred in Europe because of the introduction of the alien fungal pathogen, Hymenoscyphus fraxineus, from East Asia. Since European ash is a keystone species having critical importance for biodiversity, and only a small percentage of the ash population appears to show some tolerance against the pathogen, the loss of ash trees means that other associated organisms, especially those with high or obligate associations to ash, are at risk of further species declines. In this study, we used high throughput DNA sequencing and multivariate analysis to characterize: (i) the mycobiome in aerial tissues (i.e., leaf, bark, and xylem) of ash trees showing different phenotypic response to ash dieback, (ii) the temporal variation in fungal communities across the growing season, and (iii) the similarity in fungal community structure between ash and other common trees species that may serve as an ecological niche substitute for ash microfungi. Results showed that fungal communities differed among the three tissue types, susceptibility classes, in time and between sites. Trophic analysis of functional groups using the FUNGuild tool indicated a higher presence of pathotrophic fungi in leaves than in bark and xylem. The share of pathotrophic fungi increased along a gradient of low to high disease susceptibility in both bark and xylem tissue, while the proportion of symbiotrophic fungi correspondingly decreased in both tissue types. Neighboring, alternative host trees did not share all the fungal species found in ash, however, most microfungi uniquely associated to ash in this study are generalists and not strictly host specific. The progressive disappearance of ash trees on the landscape imposes a high risk for extinction of Red-listed macrofungal species, and breeding for resistance against ash dieback should help sustain important biodiversity associated to ash. Microfungal diversity though may be less prone to such demise since most ash-associated endophytes appear to occur on a broad range of host species. 

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  • 14.
    Agu, Johan
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Vad tycker skogsägaren? En studie av kundnöjdhet2020Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med rapporten var att undersöka hur Mellanskog arbetar med kundnöjdhet och hur de skogsägare som anlitar dem för avverkningsuppdrag upplever kundnöjdheten. Resultatet från enkätundersökningen visade att de flesta som anlitat Mellanskog för ett avverkningsuppdrag visade en hög grad av kundnöjdhet. Mellanskog arbetade inte själv aktivt med analyser av kundnöjdhet eller hade ett uttalat arbetssätt kring kundnöjdhet.

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  • 15. Aguilar, Francisco X.
    et al.
    Kelly, Matthew C.
    Danley, Brian
    Swedish University of Agricultural Sciences, Umeå, Sweden.
    Total Economic Value, Ecosystem Services and the Role of Public Policy Instruments in the Creation and Destruction of Forest Values2019In: Services in Family Forestry / [ed] Teppo Hujala; Anne Toppinen; Brett J. Butler, Cham: Springer, 2019, p. 103-118Chapter in book (Refereed)
    Abstract [en]

    Established frameworks such as the Millennium Ecosystem Assessment (MEA) and the Total Economic Value (TEV) recognize how forest ecosystems have extrinsic and intrinsic value to society. We critically discuss the appropriateness of attempting to adapt a service-dominant logic (S-D logic) framework to meet the unique characteristics of forest ecosystems by incorporating elements from the MEA and TEV. This chapter enriches the current discussion related to S-D logic and forests by including inherent values in-neglect, no-use and no-trade. These categories highlight how the value of forests can be created or destroyed when forest owners neglect values to their wellbeing or when absence of transactions fail to clearly define beneficiaries. Within an overview of Services in Family Forestry we argue and illustrate how the process of participation in public policy programs can influence individual and collective value co-creation and co-destruction. Moreover, institutions can play a critical role in the value creation process as brokers between beneficiaries.

  • 16.
    Ahlström, Anders
    et al.
    Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden.
    Canadell, Josep G.
    Global Carbon Project, CSIRO Oceans and Atmosphere, ACT, Canberra, Australia.
    Metcalfe, Daniel B.
    Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
    Widespread Unquantified Conversion of Old Boreal Forests to Plantations2022In: Earth's Future, E-ISSN 2328-4277, Vol. 10, no 11, article id e2022EF003221Article in journal (Refereed)
    Abstract [en]

    Across the boreal biome, clear-cutting of old, previously non clear-cut forests with high naturalness followed by tree planting or seeding is a major land use change. However, how much previously uncut forest has been converted to plantations remains unquantified. We combine Swedish national databases on clear-cuts and forest inventories to show that at least 19% of all clear-cuts since 2003 have occurred in old forests that were most likely not previously cut and planted or seeded. Old forests have been cut and lost at a steady rate of ∼1.4% per year for the same period, and at this rate they will disappear by the 2070s. There is further evidence that this type of unreported forest conversion is occurring across much of the world's boreal forest.

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  • 17. Akhter, Shirin
    et al.
    Kretzschmar, Warren W.
    Nordal, Veronika
    Delhomme, Nicolas
    Street, Nathaniel
    Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
    Nilsson, Ove
    Emanuelsson, Olof
    Sundström, Jens F.
    Integrative analysis of three RNA sequencing methods identifies mutually exclusive exons of MADS-box isoforms during early bud development in Picea abies2018In: Frontiers in Plant Science, E-ISSN 1664-462X, Vol. 9, article id 1625Article in journal (Refereed)
    Abstract [en]

    Recent efforts to sequence the genomes and transcriptomes of several gymnosperm species have revealed an increased complexity in certain gene families in gymnosperms as compared to angiosperms. One example of this is the gymnosperm sister Glade to angiosperm TM3-like MADS-box genes, which at least in the conifer lineage has expanded in number of genes. We have previously identified a member of this subclade, the conifer gene DEFICIENS AGAMOUS LIKE 19 (DAL19), as being specifically upregulated in cone-setting shoots. Here, we show through Sanger sequencing of mRNA-derived cDNA and mapping to assembled conifer genomic sequences that DAL19 produces six mature mRNA splice variants in Picea abies. These splice variants use alternate first and last exons, while their four central exons constitute a core region present in all six transcripts. Thus, they are likely to be transcript isoforms. Quantitative Real-Time PCR revealed that two mutually exclusive first DAL19 exons are differentially expressed across meristems that will form either male or female cones, or vegetative shoots. Furthermore, mRNA in situ hybridization revealed that two mutually exclusive last DAL19 exons were expressed in a cell-specific pattern within bud meristems. Based on these findings in DAL19, we developed a sensitive approach to transcript isoform assembly from short-read sequencing of mRNA. We applied this method to 42 putative MADS-box core regions in P abies, from which we assembled 1084 putative transcripts. We manually curated these transcripts to arrive at 933 assembled transcript isoforms of 38 putative MADS-box genes. 152 of these isoforms, which we assign to 28 putative MADS-box genes, were differentially expressed across eight female, male, and vegetative buds. We further provide evidence of the expression of 16 out of the 38 putative MADS-box genes by mapping PacBio Iso-Seq circular consensus reads derived from pooled sample sequencing to assembled transcripts. In summary, our analyses reveal the use of mutually exclusive exons of MADS-box gene isoforms during early bud development in P. abies, and we find that the large number of identified MADS-box transcripts in P. abies results not only from expansion of the gene family through gene duplication events but also from the generation of numerous splice variants.

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  • 18.
    Akram, Usman
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Biology. Linköping University, Faculty of Science & Engineering.
    Quttineh, Nils-Hassan
    Linköping University, Department of Mathematics, Applied Mathematics. Linköping University, Faculty of Science & Engineering.
    Wennergren, Uno
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Biology. Linköping University, Faculty of Science & Engineering.
    Tonderski, Karin
    Linköping University, Department of Physics, Chemistry and Biology, Biology. Linköping University, Faculty of Science & Engineering.
    Metson, Genevieve
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Biology. Linköping University, Faculty of Science & Engineering. Linköping University, Centre for Climate Science and Policy Research, CSPR.
    Author Correction: Enhancing nutrient recycling from excreta to meet crop nutrient needs in Sweden - a spatial analysis2020In: Scientific Reports, E-ISSN 2045-2322, Vol. 10, no 1, article id 361Article in journal (Other academic)
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  • 19. Akselsson, Cecilia
    et al.
    Belyazid, Salim
    Stockholm University, Faculty of Science, Department of Physical Geography.
    Critical biomass harvesting - Applying a new concept for Swedish forest soils2018In: Forest Ecology and Management, ISSN 0378-1127, E-ISSN 1872-7042, Vol. 409, p. 67-73Article in journal (Refereed)
    Abstract [en]

    The contribution of forest harvesting to base cation losses and soil acidification has increased in recent years in Sweden, as the demand for bioenergy has increased and the sulphur deposition has decreased. Thus, new policy tools are required to evaluate the progress of the recovery from acidification, and as a basis for forest management recommendations. In this study we introduce and test a concept, Critical biomass harvesting. The concept builds on the concept Critical loads, which has been used world-wide for several decades as a bridge between science and policies related to transboundary air pollution and acidification. The basis for the concept is an acidity mass balance, with sources and sinks of acidity. A critical limit defines the highest acceptable acidification status of the water leaving the root zone. Based on the critical limit, the highest allowed biomass harvesting can be calculated, keeping the other parameters constant. In this study the critical limit was set to ANC (Acid Neutralizing Capacity) = 0. Nitrogen was assumed to be affecting acidity only if it leaches from the root zone. The critical biomass harvesting was calculated for almost 12000 National Forest Inventory sites with spruce and pine forest, using the best available data on deposition, weathering and nitrogen leaching. The exceedance of critical biomass harvesting was calculated as the difference between the estimated harvest losses and the critical biomass harvesting. The results were presented as median values in merged catchments in a catchment database, with totally 2079 merged catchments in Sweden. According to the calculations, critical biomass harvesting was exceeded in the southern half of Sweden already at stem harvesting in spruce forests. Whole-tree harvesting expanded the exceedance area, and increased the exceedance levels in southern Sweden. The exceedance in pine forest was lower and affected smaller areas. It was concluded that the concept of critical biomass harvesting can be successfully applied on the same database that has been used for critical load calculations in Sweden, using basically the same approach as has been extensively applied, evaluated and discussed in a critical load context. The results from the calculations in Sweden indicate that whole-tree harvesting, without wood ash recycling, can be expected to further slow down recovery, especially in the most acidified parts of the country, in the southwest.

  • 20.
    Akselsson, Cecilia
    et al.
    IVL Swedish Environmental Research Institute, Sweden.
    Westling, Olle
    IVL Swedish Environmental Research Institute, Sweden.
    Alveteg, Mattias
    Lund University, Sweden.
    Thelin, Gunnar
    Lund University, Sweden.
    Fransson, Ann-Mari
    Lund University, Sweden.
    Hellsten, Sofie
    IVL Swedish Environmental Research Institute, Sweden.
    The influence of N load and harvest intensity on the risk of P limitation in Swedish forest soils2008In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 404, no 2-3, p. 284-289Article in journal (Refereed)
    Abstract [en]

    Nitrogen (N) is often considered to be the major factor limiting tree growth in northern forest ecosystems. An increased N availability, however, increases the demand for other nutrients such as base cations and phosphorous (P) which in turn may change which nutrient is the limiting factor. If P or base cations become limiting, N will start to leach which means a risk of increased eutrophication of surface waters. As many studies focus on base cations, this study instead aims at estimating P budgets on a regional scale for different harvesting scenarios relevant for Swedish conditions.

    P budget calculations were carried out for 14,550 coniferous sites from the Swedish National Forest Inventory, as weathering+deposition–harvesting–leaching. Three scenarios with different harvest intensities were used: 1) no harvesting, 2) stem harvesting and 3) whole-tree harvesting. The input data were derived from measurements and model results.

    The P budget estimates indicate that harvesting, especially whole-tree harvesting, result in net losses of P in large parts of Sweden. The highest losses were found in southern Sweden due to high growth rate in this area. In the whole-tree harvesting scenario the losses exceeded 1 kg ha− 1 y− 1 on many sites. N budget calculations on the same sites indicate that N generally accumulates in the whole country and especially in the southern parts. Consequently, the N and P budget calculations indicate that the forests in southern Sweden are in a transition phase from N-to P-limitation to growth. This transition will proceed as long as the accumulation of N continues. These results are important in a sustainable forestry context, as a basis for assessing the risk of future N leaching, and in designing recommendations for abatement strategies of N deposition and for application of wood ash recycling and N fertilization.

  • 21.
    Aksoy, Samet
    et al.
    Istanbul Technical University, Türkiye.
    Hasan Al Shwayyat, Shouq Zuhter
    Marmara University, Türkiye.
    Nur Topgül, Şule
    Istanbul Technical University, Türkiye.
    Sertel, Elif
    Istanbul Technical University, Türkiye.
    Ünsalan, Cem
    Marmara University, Türkiye.
    Salo, Jari
    University of Helsinki, Finland.
    Holmström, Anton
    Katam Technologies, Sweden.
    Wallerman, Jörgen
    Swedish University of Agricultural Sciences, Sweden.
    Nilsson, Mats
    Swedish University of Agricultural Sciences, Sweden.
    Fransson, Johan
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Forest Biophysical Parameter Estimation via Machine Learning and Neural Network Approaches2023In: IGARSS 2023 - 2023 IEEE International Geoscience and Remote Sensing Symposium: Pasadena, CA, USA, 2023, IEEE, 2023, p. 2661-2664Conference paper (Refereed)
    Abstract [en]

    This paper presents the first results of the ongoing development of new forest mapping methods for the Swedish national forest mapping case using Airborne Laser Scanning (ALS) data, utilizing the recent findings in machine learning (ML) and Artificial Intelligence (AI) techniques. We used Random Forest (RF) and eXtreme Gradient Boosting (XGBoost) as ML models. In addition, Neural networks (NN) based approaches were utilized in this study. ALS derived features were used to estimate the stem volume (V), above-ground biomass (AGB), basal area (B), tree height (H), stem diameter (D), and forest stand age (A). XGBoost ML algorithm outperformed RF 1 % to 3 % in the R² metric. NN model performed similar to ML model, however it is superior in the estimation of V, AGB, and B parameters.

  • 22.
    Albaugh, Timothy J
    et al.
    North Carolina State University, USA.
    Bergh, Johan
    Swedish University of Agricultural Sciences.
    Lundmark, Tomas
    Swedish University of Agricultural Sciences.
    Nilsson, Urban
    Stape, José Luiz
    North Carolina State University, USA.
    Allen, H Lee
    North Carolina State University, USA.
    Linder, Sune
    Swedish University of Agricultural Sciences.
    Do biological expansion factors adequately estimate stand-scale aboveground component biomass for Norway spruce?2009In: Forest Ecology and Management, ISSN 0378-1127, E-ISSN 1872-7042, Vol. 258, no 12, p. 2628-2637Article in journal (Refereed)
    Abstract [en]

    We developed site specific component (stem, branch, and foliage) biomass functions for two sites in Sweden (64° and 57° North latitude) where four treatments (control, irrigated, fertilized, irrigated plus fertilized) were applied in the existing Norway spruce stands (Picea abies L. Karst.) for 17 years. We tested for site effects in the component biomass equations and compared site specific biomass estimates to those generated using published functions ( Lehtonen et al., 2004 and Wirth et al., 2004). Site effects were significant for all components and indicated it would be unlikely to generate equations that well estimate biomass across the Norway spruce range as implicitly indicated in our efforts to generate species biomass expansion factors. We rejected our hypothesis that the published functions would well estimate component biomass for control plots. The published functions did not compare well with site specific component biomass estimates for the other treatments; both published functions well estimated stem mass up to stem mass of 25 Mg ha−1, beyond which stem mass was overestimated, and both functions over and under estimated foliage and branch mass. Nor did the published functions compare well with each other, with stem, foliage and branch mass estimate differences of 12, 55, −8% and 11, 77, and 59% for the southern and northern sites, respectively, when averaged over all treatments and years. Adding limiting resources through fertilization increased stem, foliage and branch mass 57, 11, 18% and 120, 37, and 69% at the southern and northern sites, respectively, which would increase carbon sequestration and available stemwood and bioenergy materials. We recommend that more effort is spent in process-based modeling to better predict mass at a given site and ultimately provide better estimates of carbon sequestration and bioenergy material production changes.

  • 23.
    Albrectsen, Benedicte Riber
    et al.
    Umeå University, Faculty of Science and Technology, Department of Plant Physiology. Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC).
    Witzell, J.
    Swedish University of Agricultural Sciences, Faculty of Forest Sciences, Southern Swedish Forest Research Centre, Alnarp, Sweden.
    Disentangling functions of fungal endophytes in forest trees2012In: Fungi: types, environmental impact and role in disease / [ed] Adolfo Paz-Silva; María Sol Arias Vázquez, Nova Science Publishers, Inc., 2012, p. 235-246Chapter in book (Refereed)
    Abstract [en]

    Endophytic fungi are known to be abundant colonizers of the internal tissues of forest trees, but their ecological functions are still largely unknown. Recent studies indicate that endophytes may associate with tree's resistance and tolerance properties, and they are thus potential bio-agents that could be utilized in sustainable forest protection and management. To gain a better understanding of the endophytes' potential role in shaping forest health we need more evidence in the form of ecological studies of endophyte communities, in various tissues, across space, and time. The recent advances in molecular methods have given us new and effective tools to obtain such data. Studies of endophyte functions are further facilitated with the development of new high through-put screening methods for substrate use and competitive ability. Fungi are known as chemical factories of natural compounds with biological properties. Beside their potential as antagonists against pests and diseases, the tree-associated endophytic fungi therefore also appear as an emerging source of novel biomolecules for industrial or clinical applications outside forestry. This chapter presents some of the current methodological approaches that are likely to be valuable in studies on endophyte diversity in forest trees, and discusses the goals and impacts of the studies that aim at disentangling the beneficial potential of fungal endophytes in trees. A new concept, bioactive symbiosis, is suggested as a general framework for these studies.

  • 24. Aldea, Jorge
    et al.
    Ruiz-Peinado, Ricardo
    del Rio, Miren
    Pretzsch, Hans
    Heym, Michael
    Brazaitis, Gediminas
    Jansons, Aris
    Metslaid, Marek
    Barbeito, Ignacio
    Bielak, Kamil
    Granhus, Aksel
    Holm, Stig-Olof
    Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
    Nothdurft, Arne
    Sitko, Roman
    Lof, Magnus
    Species stratification and weather conditions drive tree growth in Scots pine and Norway spruce mixed stands along Europe2021In: Forest Ecology and Management, ISSN 0378-1127, E-ISSN 1872-7042, Vol. 481, article id 118697Article in journal (Refereed)
    Abstract [en]

    Mixed forests are suggested as a strategic adaptation of forest management to climate change. Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies (L.) Karst.) are tree species of high economic and ecological value for European forestry. Both species coexist naturally in a large part of their distributions but there is a lack of knowledge on the ecological functioning of mixtures of these species and how to manage such stands. This paper analyses these species' intra- and inter-specific competition, including size-symmetric vs. size-asymmetric competition, and explore the effect of weather conditions on tree growth and competition. We studied basal area growth at tree level for Scots pine and Norway spruce in mixed versus pure stands in 22 triplets of fully-stocked plots along a broad range of ecological conditions across Europe. Stand inventory and increment cores provided insights into how species mixing modifies tree growth compared with neighbouring pure stands. Five different competition indices, weather variables and their interactions were included and checked in basal area growth models using a linear mixed model approach. Interspecific size-asymmetric competition strongly influenced growth for both tree species, and was modulated by weather conditions. However, species height stratification in mixed stands resulted in a greater tree basal area growth of Scots pine (10.5 em(2) year(-1)) than in pure stands (9.3 em(2) year(-1)), as this species occupies the upper canopy layer. Scots pine growth depended on temperature and drought, whereas Norway spruce growth was influenced only by drought. Interspecific site-asymmetric competition increased in cold winters for Scots pine, and decreased after a drought year for Norway spruce. Although mixtures of these species may reduce tree size for Norway spruce, our results suggest that this could be offset by faster growth in Scots pine. How inter-specific competition and weather conditions alter tree growth may have strong implications for the management of Scots pine-Norway spruce mixtures along the rotation period into the ongoing climate change scenario.

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  • 25.
    Aldea, Jorge
    et al.
    Southern Swedish Forest Research Centre, Swedish University of Agricultural Sciences, Lomma, Sweden.
    Ruiz-Peinado, Ricardo
    Forest Research Center, INIA, CSIC, Madrid, Spain; iuFOR, Sustainable Forest Management Research Institute, University of Valladolid & INIA, Valladolid, Spain.
    del Río, Miren
    Forest Research Center, INIA, CSIC, Madrid, Spain; iuFOR, Sustainable Forest Management Research Institute, University of Valladolid & INIA, Valladolid, Spain.
    Pretzsch, Hans
    Chair of Forest Growth and Yield Science, School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany.
    Heym, Michael
    Chair of Forest Growth and Yield Science, School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany.
    Brazaitis, Gediminas
    Department of Forest Science, Vytautas Magnus University, Kaunas, Lithuania.
    Jansons, Aris
    Latvian State Forest Research Institute Silava, Salaspils, Latvia.
    Metslaid, Marek
    Chair of Silviculture and Forest Ecology, Institute of Forestry and Rural Engineering, Estonian University of Life Sciences, Tartu, Estonia.
    Barbeito, Ignacio
    Department of Forest Resources Management, Faculty of Forestry, The University of British Columbia, BC, Vancouver, Canada.
    Bielak, Kamil
    Department of Silviculture, Institute of Forest Sciences, Warsaw University of Life Sciences, Warsaw, Poland.
    Hylen, Gro
    NIBIO, Norwegian Institute of Bioeconomy Research, Ås, Norway.
    Holm, Stig-Olof
    Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
    Nothdurft, Arne
    Department of Forest- and Soil Sciences, Institute of Forest Growth, BOKU, University of Natural Resources and Life Sciences Vienna, Vienna, Austria.
    Sitko, Roman
    Technical University in Zvolen, Faculty of Forestry, Department of Forest Resource Planning and Informatics, Zvolen, Slovakia.
    Löf, Magnus
    Southern Swedish Forest Research Centre, Swedish University of Agricultural Sciences, Lomma, Sweden.
    Timing and duration of drought modulate tree growth response in pure and mixed stands of Scots pine and Norway spruce2022In: Journal of Ecology, ISSN 0022-0477, E-ISSN 1365-2745, Vol. 110, no 11, p. 2673-2683Article in journal (Refereed)
    Abstract [en]
    1. Climate change is increasing the severity and frequency of droughts around the globe, leading to tree mortality that reduces production and provision of other ecosystem services. Recent studies show that growth of mixed stands may be more resilient to drought than pure stands. The two most economically important and widely distributed tree species in Europe are Norway spruce (Picea abies (L.) Karst) and Scots pine (Pinus sylvestris L.), but little is known about their susceptibility to drought when coexist.
    2. This paper analyses the resilience (resistance, recovery rate and recovery time) at individual-tree level using a network of tree-ring collections from 22 sites along a climatic gradient from central Europe to Scandinavia. We aimed to identify differences in growth following drought between the two species and between mixed and pure stands, and how environmental variables (climate, topography and site location) and tree characteristics influence them.
    3. We found that both the timing and duration of drought drive the different responses between species and compositions. Norway spruce showed higher vulnerability to summer drought, with both lower resistance and a longer recovery time than Scots pine. Mixtures provided higher drought resistance for both species compared to pure stands, but the benefit decreases with the duration of the drought. Especially climate sensitive and old trees in climatically marginal sites were more affected by drought stress.
    4. Synthesis. Promoting Scots pine and mixed forests is a promising strategy for adapting European forests to climate change. However, if future droughts become longer, the advantage of mixed stands could disappear which would be especially negative for Norway spruce.
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  • 26.
    Algotsson, Elin
    et al.
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Östman, Hanna
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Svensk contortatall (Pinus contorta) på en amerikansk marknad?2023Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Tack vare vissa önskade egenskaper gjordes en storsatsning på contortatall (Pinus contorta) i Sverige på 70-talet. Idag finns cirka 600 000 ha i Sverige som det gjorts provsågningar på och är nu dags att hitta användningsområden till. Syftet med denna studie var att undersöka skillnaden i utbyte mellan contortatall och gran (Picea abies) efter hyvling. Målet var att undersöka om sidobrädor av contortatall kan vara ett substitut till sidobrädor av gran vid hyvling ämnat för den amerikanska marknaden.Efter skanning av brädor samt manuell visuell sortering visade det sig att 92 % av granbrädorna var utan defekt medan 24 % av contortatallen var det. 34 % av contortatallen nedklassades för hål och 3 % av granen. Slutsatsen av studien visar att mängden och storleken på kvistarna är ett problem för contortatallvirket. För att få ett högkvalitativt virke behövs en djupare översyn av tillvägagångssättet för torkning och trädens tillväxtförhållanden.

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  • 27.
    Aliabad, Fahime Arabi
    et al.
    Yazd Univ, Fac Nat Resources & Desert Studies, Dept Arid Lands Management, Yazd 8915818411, Iran..
    Shojaei, Saeed
    Univ Tehran, Fac Nat Resources, Dept Arid & Mountainous Reg Reclamat, Tehran 1417935840, Iran..
    Mortaz, Morad
    Univ Calif Davis, Dept Plant Sci, Davis, CA 95616 USA..
    Ferreira, Carla Sofia Santos
    Stockholm Univ, Dept Phys Geog, S-10691 Stockholm, Sweden.;Stockholm Univ, Bolin Ctr Climate Res, S-10691 Stockholm, Sweden.;Polytech Inst Coimbra, Res Ctr Nat Resources Environm & Soc CERNAS, Agr Sch Coimbra, P-3045601 Coimbra, Portugal..
    Kalantari, Zahra
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Water and Environmental Engineering. Stockholm Univ, Dept Phys Geog, S-10691 Stockholm, Sweden.;Stockholm Univ, Bolin Ctr Climate Res, S-10691 Stockholm, Sweden..
    Use of Landsat 8 and UAV Images to Assess Changes in Temperature and Evapotranspiration by Economic Trees following Foliar Spraying with Light-Reflecting Compounds2022In: Remote Sensing, E-ISSN 2072-4292, Vol. 14, no 23, p. 6153-, article id 6153Article in journal (Refereed)
    Abstract [en]

    Pistachio is an important economic crop in arid and semi-arid regions of Iran. A major problem leading to a reduction in crop quality and reduced marketability is extreme air temperature in summer, which causes sunburn of pistachio leaves and fruit. A solution proposed to deal with the negative effects of high temperatures and increase water consumption efficiency in pistachio orchards is use of light-reflecting compounds. This study investigated the effect of foliar application of gypsum, sulfur, and NAX-95 (calcium-based suspension coating) to trees in a pistachio orchard (150 ha) in central Iran. The effect of these foliar products is assessed at plot scale, using control plots sprayed with calcium sulfate, based on temperature and evapotranspiration changes analyzed through remote sensing. Landsat 8 sensor images and RGB images collected by UAVs (spatial resolution of 30 m and 20 cm, respectively), on the same dates, before and after foliar spray application, were merged using the PCA method and bilinear interpolation re-sampling. Land surface temperature (LST) was then estimated using the split-window algorithm, and daily evapotranspiration using the surface energy balance algorithm for land (SEBAL) algorithm. A land use map was prepared and used to isolate pistachio trees in the field and assess weed cover, whose effect was not accounted. The results showed that temperature remained constant in the control plot between the spraying dates, indicating no environmental changes. In the main plots, gypsum had the greatest effect in reducing the temperature of pistachio trees. The plots with foliar spraying with gypsum displayed a mean tree temperature (47-48 degrees C) decrease of 3.3 degrees C in comparison with the control plots (>49 degrees C), leading to an average decline in evapotranspiration of 0.18 mm/day. NAX-95 and sulfur reduced tree temperature by on average 1.3 degrees C and 0.6 degrees C, respectively. Thus, gypsum is the most suitable foliar-spraying compound to lower the temperature of pistachio trees, reduce the water requirement, and increase crop productivity.

  • 28.
    Almstedt, Åsa
    et al.
    Umeå University, Faculty of Social Sciences, Department of Geography and Economic History.
    Keskitalo, E. Carina H.
    Umeå University, Faculty of Social Sciences, Department of Geography and Economic History.
    The role of market measures in forest governance: the example of forest certification in boreal forests2017In: CABI Reviews: Perspectives in Agriculture, Veterinary Science, Nutrition and Natural Resources, E-ISSN 1749-8848, Vol. 12, no 11, p. 1-11Article in journal (Refereed)
  • 29.
    Almstedt, Åsa
    et al.
    Umeå University, Faculty of Social Sciences, Department of Geography and Economic History, Economic and social geography.
    Reed, Maureen G.
    Introducing a framework for good and adaptive governance: an application to fire management planning in Canada's boreal forest2013In: Forestry Chronicle, ISSN 0015-7546, Vol. 89, no 5, p. 664-674Article in journal (Refereed)
    Abstract [en]

    Planning for and managing disturbances in protected areas requires governance arrangements that are both adaptive to changing conditions and effective in dealing with multiple challenges. This paper presents a framework composed of principles and criteria of good and adaptive governance that pays attention to inclusiveness, responsibility, fairness, strategic vision, performance orientation, and adaptiveness. The framework was empirically tested on fire management planning in Prince Albert National Park, Saskatchewan, Canada, involving interactions between Parks Canada and Saskatchewan Environment. Our results suggest that while the principle of performance orientation was upheld, principles such as inclusiveness and adaptiveness were only partially supported. Additional testing beyond fire management planning can help determine the utility of the framework for other environmental management situations.

  • 30.
    Alvskog, Kristina
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Rotstock av tall: Hur blir den framtida virkeskvaliteten?2014Independent thesis Basic level (degree of Bachelor), 180 HE creditsStudent thesis
    Abstract [en]

    In Sweden the quality of Scots pine (Pinus sylvestris) saw timber has decreased. It is especially due to increased labour cost that has led to rational and effective forest management.

    This study investigated the quality of Scots pine and the potential to produce high quality stems in 9 stands in Bergslagen, Sweden. Two different stand types were investigated: Pruned stands and conventional managed stands. The outcome was a high percentage of valuable stems in the pruned stands (72-94 %), and 46-56 % in the conventional managed stands. It is possible to produce high quality timber of Scots pine with active management, for example by pruning and careful selection of stems in thinnings.

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  • 31.
    Amiandamhen, Stephen
    et al.
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Kumar, Anuj
    Natural Resources Institute Finland (Luke), Finland.
    Adamopoulos, Stergios
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Jones, Dennis
    Luleå university of technology, Sweden;Czech university of life sciences Prague, Czech Republic.
    Nilsson, Bengt
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Bioenergy production and utilization in different sectors in Sweden: A state of the art review2020In: BioResources, E-ISSN 1930-2126, Vol. 15, no 4, p. 9834-9857Article in journal (Refereed)
    Abstract [en]

    In the continual desire to reduce the environmental footprints of human activities, research efforts to provide cleaner energy is increasingly becoming vital. The effect of climate change on present and future existence, sustainable processes, and utilizations of renewable resources have been active topics within international discourse. In order to reduce the greenhouse gases emissions from traditional materials and processes, there has been a shift to more environmental friendly alternatives. The conversion of biomass to bioenergy, including biofuels has been considered to contribute to the future of climate change mitigation, although there are concerns about carbon balance from forest utilization. Bioenergy accounts for more than one-third of all energy used in Sweden and biomass has provided about 60% of the fuel for district heating. Apart from heat and electricity supply, the transport sector, with about 30% of global energy use, has a significant role in a sustainable bioenergy system. This review presents the state of the art in the Swedish bioenergy sector based on literature and Swedish Energy Agency’s current statistics. The review also discusses the overall bioenergy production and utilization in different sectors in Sweden. The current potential, challenges, and environmental considerations of bioenergy production are also discussed

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  • 32.
    Ampoorter, Evy
    et al.
    Univ Ghent, Dept Environm, Forest & Nat Lab, Campus Gontrode, Geraardsbergsesteenweg 267, BE-9090 Melle Gontrode, Belgium.
    Barbaro, Luc
    Univ Toulouse, DYNAFOR, INRA, INPT, INPT EL PURPAN, Castanet Tolosan, France.
    Jactel, Hervé
    Univ Bordeaux, INRA, Biogeco, Cestas, France.
    Baeten, Lander
    Univ Ghent, Dept Environm, Forest & Nat Lab, Campus Gontrode, Geraardsbergsesteenweg 267, BE-9090 Melle Gontrode, Belgium; Sorbonne Univ, CNRS, Museum Natl Hist Nat, CESCO, Paris, France.
    Boberg, Johanna
    Swedish Univ Agr Sci, Dept Forest Mycol & Plant Pathol, Uppsala, Sweden.
    Carnol, Monique
    Univ Liege, Lab Plant & Microbial Ecol, InBioS, Dept Biol, Ecol, Evolut, Liege, Belgium.
    Castagneyrol, Bastien
    Univ Bordeaux, INRA, Biogeco, Cestas, France.
    Charbonnier, Yohan
    Univ Bordeaux, INRA, Biogeco, Cestas, France.
    Dawud, Seid Muhie
    Wollo Univ, Coll Agr, Dept Forestry, Dessie, Ethiopia.
    Deconchat, Marc
    Univ Toulouse, DYNAFOR, INRA, INPT, INPT EL PURPAN, Castanet Tolosan, France.
    De Smedt, Pallieter
    Univ Ghent, Dept Environm, Forest & Nat Lab, Campus Gontrode, Geraardsbergsesteenweg 267, BE-9090 Melle Gontrode, Belgium.
    De Wandeler, Hans
    Katholieke Univ Leuven, Dept Earth & Environm Sci, Leuven, Belgium.
    Guyot, Virginie
    Univ Toulouse, DYNAFOR, INRA, INPT, INPT EL PURPAN, Castanet Tolosan, France; Univ Bordeaux, INRA, Biogeco, Cestas, France.
    Hättenschwiler, Stephan
    Univ Paul Valery Montpellier, Univ Montpellier, Ctr Evolutionary & Funct Ecol, UMR5175, CNRS, EPHE 1919, Montpellier, France.
    Joly, Francois-Xavier
    Univ Stirling, Biol & Environm Sci, Stirling, Scotland.
    Koricheva, Julia
    Royal Holloway Univ London, Sch Biol Sci, Egham, Surrey, England.
    Milligan, Harriet
    Royal Holloway Univ London, Sch Biol Sci, Egham, Surrey, England.
    Muys, Bart
    Katholieke Univ Leuven, Dept Earth & Environm Sci, Leuven, Belgium.
    Nguyen, Diem
    Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Systematic Biology. Dept of Forest Mycology and Plant Pathology, Swedish Univ. of Agricultural Sciences, Uppsala, Sweden.
    Ratcliffe, Sophia
    Univ Leipzig, Dept Systemat Bot & Funct Biodivers, Leipzig, Germany.
    Raulund-Rasmussen, Karsten
    Univ Copenhagen, Dept Geosci & Nat Resource Management, Frederiksberg, Denmark.
    Scherer-Lorenzen, Michael
    Univ Freiburg, Geobot, Fac Biol, Freiburg, Germany.
    van der Plas, Fons
    Univ Leipzig, Dept Systemat Bot & Funct Biodivers, Leipzig, Germany.
    Van Keer, J.
    Kapelle‐op‐den‐Bos, Belgium.
    Verheyen, Kris
    Univ Ghent, Dept Environm, Forest & Nat Lab, Campus Gontrode, Geraardsbergsesteenweg 267, BE-9090 Melle Gontrode, Belgium.
    Vesterdal, Lars
    Univ Copenhagen, Dept Geosci & Nat Resource Management, Frederiksberg, Denmark.
    Allan, Eric
    Univ Bern, Inst Plant Sci, Bern, Switzerland.
    Tree diversity is key for promoting the diversity and abundance of forest-associated taxa in Europe2020In: Oikos, ISSN 0030-1299, E-ISSN 1600-0706, Vol. 129, no 2, p. 133-146Article in journal (Refereed)
    Abstract [en]

    Plant diversity is an important driver of diversity at other trophic levels, suggesting that cascading extinctions could reduce overall biodiversity. Most evidence for positive effects of plant diversity comes from grasslands. Despite the fact that forests are hotspots of biodiversity, the importance of tree diversity, in particular its relative importance compared to other management related factors, in affecting forest-associated taxa is not well known. To address this, we used data from 183 plots, located in different forest types, from Mediterranean to Boreal, and established along a climatic gradient across six European countries (FunDivEUROPE project). We tested the influence of tree diversity, tree functional composition (i.e. functional trait values), forest structure, climate and soil on the diversity and abundance/activity of nine taxa (bats, birds, spiders, microorganisms, earthworms, ungulates, foliar fungal pathogens, defoliating insects and understorey plants) and on their overall diversity and abundance/activity (multidiversity, multiabundance/activity). Tree diversity was a key driver of taxon-level and overall forest-associated biodiversity, along with tree functional composition, forest structure, climate and soil. Both tree species richness and functional diversity (variation in functional trait values) were important. The effects of tree diversity on the abundance/activity of forest-associated taxa were less consistent. Nonetheless, spiders, ungulates and foliar fungal pathogens were all more abundant/active in diverse forests. Tree functional composition and structure were also important drivers of abundance/activity: conifer stands had lower overall multidiversity (although the effect was driven by defoliating insects), while stands with potentially tall trees had lower overall multiabundance/activity. We found more synergies than tradeoffs between diversity and abundance/activity of different taxa, suggesting that forest management can promote high diversity across taxa. Our results clearly show the high value of mixed forest stands for multiple forest-associated taxa and indicate that multiple dimensions of tree diversity (taxonomic and functional) are important.

  • 33.
    Andersson, Adrian
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Faktorer som bidragit till nyetablering av ädellövskog i Dalsland2023Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Sett över hela landet växer ädellövskog endast på en procent av den produktiva skogsmarken. I det studerade området Dalsland utgörs virkesförrådet uppskattningsvis av tre procent ädla lövträd. Dess förekomst är därför att betrakta som relativt sällsynt. Denna studie hade för avsikt att intervjua markägare som har valt att nyetablera med ädellövskog och genom det förstå vad det är som bidragit till att de föryngrat med dessa trädslag.

    Undersökningen utfördes genom att sex individer som nyetablerat med ädellövskog intervjuades. Resultatet sammanställdes därefter genom att se på gruppen som en helhet och lyfta fram samtliga påverkande faktorer. Utifrån resultatet kunde 13 faktorer identifieras som bidragande och en förståelse kring dem redogöras för. 

    Det kan konstateras att ett flertal faktorer påverkat markägarna i valet att plantera ädellövskog.

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    Ädellövskogsbruk
  • 34.
    Andersson, Andreas
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Hur noggrant skattar Katam DGV och GY jämfört med ALS?2020Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Skattning av skogliga variabler är inte längre begränsade till datainsamling genom manuell fältmätning. Numera kan skattningar göras genom insamling av data från såväl laserskanning (Airborne Laser Scanning, ALS) som mobilapplikationen Katam Forest (KF) som företaget Katam utvecklat. Dessutom kan varje enskilt träd skattas genom att kombinera Katam Treemap (KT), som använder sig av fotogrammetri för att mäta trädhöjd och identifiera träd, med KF (KF+KT) . I denna studie jämfördes skattningar av grundytevägd medeldiameter (DGV) och grundyta (GY) utförda med manuell fältmätning, ALS, KF samt KF+KT, i tre olika grandominerande bestånd. KF+KT beräknades felaktigt varför inga slutsatser kan dras om metoden. KF visade ett lägre relativt RMSE än ALS, 7,8 % jämfört med 9,6 % vid skattning av DGV. För GY var relativ RMSE 22,5 % vid KF, och 23 % vid ALS. KF bedöms med fördel kunna användas likvärdigt med manuell fältmätning.

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  • 35.
    Andersson, Anton
    et al.
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Davidsson, Adrian
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Hur mycket står risskotare stilla på grund av kommunikationsproblem?2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The communicative interaction between contractor and subcontractor of residue forwarder plays a crucial role in the efficiency of handling forest residue. Since that type of work is at the end of the harvesting process, it may be that it is not as prioritized as the previous harvesting measures. The study investigates the communicative interaction between subcontractor that drives a residue forwarder and contractor and its connection to work-related production stops. The study was accomplished by a web-based survey and quantitative interviews conducted with eight selectively selected residue forwarder drivers in southern Sweden. The result of the survey showed that the average of all total production stops was one hour and 52 minutes under an average stop period of 25 working days. Most of the stops were caused by other work-related problems. Communication problems accounted for 20% of the number of production stops and the average stop duration was one hour and five minutes. The time when a residue forwarder was inactive seventeen minutes per day. In conclusion, the communicative problems are not the main reason to inactivity for residue forwarders. However, communication plays an important role in productive harvesting and represent the biggest possibility for improvement in the communication between residue forwarder drivers and contractor, which could lead to fewer production stops.  

     

    Residue Forwarders, Communication Problems, Production Stop and Forest residue. 

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  • 36.
    Andersson, Björn
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Utvärdering och utveckling av Fiskarhedens Trävaru AB:s traktdirektiv för slutavverkning2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Gross felling has accelerated in recent decades, and as a consequence, the requirements for forestry have increased. Today a comprehensive environmental consideration needs to be taken. This also imposes higher demands on the contractors. In order for contractors to be able to live up to the requirements, it is important that the customer of the service hands over a work instruction in connection to the removal of region assignments. This work instruction and work order is created in the form of a region directive. A qualitative region directive is considered important for Fiskarhedens Trävaru AB and for their contractors. A case study has been conducted to evaluate and describe the company's current region directive. The results show that the current region directive is sometimes inadequate due to that they are poorly completed. Important content is therefore not communicated as needed. A proposal of a new improved region directive, where the content is intended to be filled in better, has therefore been developed. With the help of this region directive, Fiskarheden can maintain sustainable forestry.

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  • 37. Andersson, Elias
    et al.
    Keskitalo, E. Carina H.
    Umeå University, Faculty of Social Sciences, Department of Geography and Economic History.
    Adaptation to climate change?: Why business-as-usual remains the logical choice in Swedish forestry2018In: Global Environmental Change, ISSN 0959-3780, E-ISSN 1872-9495, Vol. 48, p. 76-85Article in journal (Refereed)
    Abstract [en]

    The two latest IPCC assessment reports have concluded that knowledge is not sufficient for inducing action on climate change. This study problematizes the issue of going beyond business-as-usual through a study of the forestry sector in Sweden, which is a large economic sector and could be expected to be an early adapter, given that newly planted forest may stand some 70-90 years into the future. Therefore resources, economic motivation in the longer term and environmental foundations for early adaptation action could be expected to exist. This study draws upon the Foucauldian conceptualization of governmentality to explain the particular institutional logics that nevertheless lead to business-as-usual arguments dominating discussion on adaptation in the case of Swedish forestry. The study emphasizes that adaptation must be seen as steered and limited by existing institutional, social system logics, rather than by externally defined "rational" motivations. Efforts on adaptation to climate change must thus be considered in relation to, and seek to change, existing institutionally based motivational and incentive structures, and must thus be conceived through social rather than environmental logics. In fact, social logics may even define the types of actions that may be regarded as adaptations.

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  • 38.
    Andersson, Elias
    et al.
    Department of Forest Resource Management, Swedish University of Agricultural Sciences, Umeå, Sweden.
    Keskitalo, E Carina H
    Umeå University, Faculty of Social Sciences, Department of Geography.
    Service logics and strategies of Swedish forestry in the structural shifts of forest ownership: challenging the "old" and shaping the "new"2019In: Scandinavian Journal of Forest Research, ISSN 0282-7581, E-ISSN 1651-1891, Vol. 34, no 6, p. 508-520Article in journal (Refereed)
    Abstract [en]

    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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  • 39. Andersson, Elias
    et al.
    Keskitalo, E Carina H
    Umeå University, Faculty of Social Sciences, Department of Geography and Economic History.
    Bergstén, Sabina
    Umeå University, Faculty of Social Sciences, Department of Geography and Economic History.
    In the eye of the storm: adaptation logics of forest owners in management and planning in Swedish areas2018In: Scandinavian Journal of Forest Research, ISSN 0282-7581, E-ISSN 1651-1891, Vol. 33, no 8, p. 800-808Article in journal (Refereed)
    Abstract [en]

    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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  • 40.
    Andersson, Elias
    et al.
    Department of Forest Resource Management, Swedish University of Agricultural Sciences, Umeå, Sweden.
    Keskitalo, E. Carina H.
    Umeå University, Faculty of Social Sciences, Department of Geography and Economic History. Department of Forest Resource Management, Swedish University of Agricultural Sciences, Umeå, Sweden.
    Lawrence, Anna
    Adaptation to climate change in forestry: a perspective on forest ownership and adaptation responses2017In: Forests, E-ISSN 1999-4907, Vol. 8, no 12, article id 493Article in journal (Refereed)
    Abstract [en]

    Adaptation to climate change has often been discussed from the perspectives of social vulnerability and community vulnerability, recognising that characteristics at local level will influence the particular adaptations undertaken. However, the extent to which national-level systemic factors influence and shape measures defined as adaptations has seldom been recognised. Focusing on adaptation to climate change in forestry, this study uses the example of two countries in the northern hemisphere with different forest ownership structures, forestry industry and traditions: Sweden, with strong private, non-industrial ownership, dominant forest industry and long forestry traditions; and Scotland, with forest ownership dominated by large estates and investment forestry based on plantations of exotic conifer species. The study shows how adaptation to climate change is structurally embedded and conditioned, which has resulted in specific challenges and constraints for different groups of forest owners within these two different contexts. This produces a specific set of political spaces and policy tools by rendering climate change in relation to forestry manageable, negotiable and practical/logical in specific ways. It is recommended that the focus of future work on climate-related issues and development of adaptation measures and policy should not be primarily on climate-related factors, but on institutional analysis of structural factors and logics in target sectors, in order to critically explore concepts of agency and power within these processes.

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  • 41.
    Andersson, Elias
    et al.
    Department of Forest Resource Management Swedish University of Agricultural Sciences, Umeå, Sweden.
    Keskitalo, E. Carina H.
    Umeå University, Faculty of Social Sciences, Department of Geography.
    Westin, Kerstin
    Umeå University, Faculty of Social Sciences, Department of Geography.
    Managing place and distance: Restructuring sales and work relations to meet urbanisation-related challenges in Swedish forestry2020In: Forest Policy and Economics, ISSN 1389-9341, E-ISSN 1872-7050, Vol. 118, article id 102267Article in journal (Refereed)
    Abstract [en]

    Drawing upon interviews with representatives of all the major forestry organisations in Sweden, this paper explores how, in their sales and services, they work to overcome the growing distance between forest owners and forests. The results indicate that increasing distance to forest owners in terms of sales and services work is largely dealt with by reorganisation of the sales process. Through trust-building activities such as modifying office structure and local work processes, and use of new technologies such as personalised forest websites/apps, previously local trust-building processes are being deliberately digitized and implemented through new technology and, in some cases, offices in cities. However, the results also suggest that these processes potentially affect the way in which forest as a resource and a place is constructed and interacted with. For example, it can be treated as an object of desire that is produced and marketed; as a place of knowledge and expertise that produces specific social and sales relations; and as a place of production to legitimize modern industrial forestry. Through this, forest management is constructed as an economic or technical issue that can be managed at a distance from the property.

  • 42.
    Andersson, Erik
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Noggrannhet och precision vid beståndsuppskattning av mobilapplikationen KATAM2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this essay was to evaluate the mobile application KATAM of accuracy, time, precision and practical use in comparison to volume estimation with data Digital Caliper and harvester report. The result of the diameter comparison showed similar estimates from KATAM and the Digital Caliper respectively. KATAM had a higher mean basel area, 7% and coarser mean diameter, 3.7%, compared to the Digital Caliper. KATAM also had overestimations in volume as compared to the harvesting report and the Digital Caliper concerning the mean stem, from 2.5% to 17.6%, depending on which sample areas were included and which version of KATAM was used. However, the basis of volume estimates was small and had error sources, which made the results of the measurements uncertain. Although the study shows an overestimation of the diameter, the mutual precision indicates that KATAM could be an alternative to the Digital Caliper when estimating the mean diameter.

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  • 43.
    Andersson, Frida
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Kolkrediters påverkan på den enskilde skogsägarens ekonomi och kolsänkan i skogen2023Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Skogen spelar en viktig roll för att minska framtida klimatförändringar. Genom att enskilda skogsägare förlänger omloppstiden på skogsbestånd som uppnått lägsta slutavverkningsålder kommer skogen att bidra till att mer koldioxid binds upp. Detta scenario kan komma att hjälpa till så att Sverigesnår klimatmålet netto noll i koldioxidytsläpp till år 2045.Syftet med denna studie var därför att undersöka vilken ekonomiskt ersättning en enskild skogsägare kan få vid en förlängd omloppstid på 20 år men även om en förlängning av omloppstiden leder till att skogen blir en kolkälla i stället för att vara en aktiv kolsänka.Resultaten visade att vid högre ståndortsindex ökande och koldioxidinlagringen vilket genererade en högre subvention. Under den förlängda omloppstiden var skogen en aktiv kolsänka men att dess kapacitet att binda in koldioxid hade börjar minska. 

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  • 44.
    Andersson, Haidi
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology. 1965.
    Hur upplevs estetik i skogsbruket?: How is aesthetics in forestry perceived?2016Independent thesis Basic level (degree of Bachelor), 180 HE creditsStudent thesis
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  • 45.
    Andersson, Ida
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Distansskogsägares nöjdhet med Södras tjänsteutbud och kvalité på tjänster2015Independent thesis Basic level (degree of Bachelor), 180 HE creditsStudent thesis
    Abstract [en]

    The development of technology and the mechanization in the Swedish forestry has during the last 60 years resulted in depopulation of the country side and due to that the amount of distance forest owners has increased. Therefore the forest companies need to make some adjustments in order to keep the distance forest owners as customers and to attract new ones. The purpose of this essay was to examine and analyze the distance forest owners satisfaction with Södras service offering and quality of service and further develop some proposals for action. A web-based survey was sent out to 634 distance forests owners in Stockholm, Sweden, all members of Södra. 269 respondents participated in the survey and of them, 27 did also participate in a follow-up telephone interview. The results show that the members generally was satisfied with the service offering and the quality of service. Suggestions for improvement regarding the service offering is all about implementing forest management courses in Stockholm and including providing financial and generational counseling, also on location in Stockholm. The quality of service can be improved if the inspector changes the way of working towards an even more customer adapted way and also improve the dialogue with the entrepreneurs. Further suggestions for improvement is to a greater extent welcome complaints and to give some compensation and/or apologize when it is motivated.

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  • 46.
    Andersson, Isac
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Riskhantering vid naturvårdsbränning: En critical incident studie (CIT)2023Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Naturvårdsbränning är en åtgärd som avser att återskapa effekterna avnaturliga skogsbränder genom att påverka det ekologiska systemet. Trotsfördelarna föreligger risker, såsom oönskad eskalering och spridning av eld,rök och glöd, vilket kan negativt påverka mark, människor och samhällen.Studiens syfte var att undersöka hur ansvariga inom Länsstyrelsen hanterarrisker genom identifiering av kritiska incidenter utifrån Critical IncidentTechnique (CIT) baserad på intervjuer, samt att bidra till att öka den allmännakunskapen kring åtgärden.Resultatet visade att naturvårdsbränningsansvariga tar stor hänsyn till riskeroch arbetar kontinuerligt för att minimera dem. Dock identifierades treförbättringsområden inom riskhanteringsarbetet: säkerhet under bränningar,kommunikation under bränningar och kommunikation med samhället.Förbättringar inom dessa områden kan minimera risker under bränningar,minska oron i samhället och antalet falsklarm samt öka tryggheten igenomförandet för allmänheten och naturvårdsbränningspersonal vidnaturvårdsbränningar.

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    Riskhantering vid naturvårdsbränning
  • 47.
    Andersson, Jonas
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Föryngring med tallsådd- ett underskattat alternativ?2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The aim of this study was to investigate the attitudes of forest owners to direct sowing of pine (Pinus sylvestris L.) and also why so few have used the method. The study also aimed to identify reasons for forest owners to use or not to use the method. A questionnaire was sent to 240 non-industrial private forest owners (NIPFs) all over Sweden. As a complement, interviews were performed with forest companies from the north and middle parts of Sweden. The results showed that 15 % of the NIPFs respond that they had used the method direct sowing of pine at some occasion in the past. No forest owner origination from Götaland had used the method though. It was more common among those who owned a forest property of 100 hectares or more than among those who owned 49 hectares or less. Most of those who had used direct sowing in the past were satisfied with the outcome of the regeneration, 92 %, and 73 % were willing to use the method again. They also showed a more positive attitude to direct sowing, 86 %, compared to those who had not tried the method, where 23 % were positive and 69 % were neither positive nor negative. The main reason for not have used the method showed to be that the NIPFs answering this questionnaire had not thought about it. Of the companies interviewed in this study, Sveaskog and Holmen were the ones that have used direct sowing the most: Sveaskog sow 27 % of the yearly pine regeneration area and Holmen just over 20 % of the yearly pine regeneration area, including lodge pole pine (Pinus contorta Douglas ex Loudon). The main reason to why the companies have used direct sowing was that they consider the method cost effective. The also appreciate that the method results in a lot of stems per hectare which has been positive in areas where browsing is a problem. The results from the questionnaire showed that those had sown pine in the past tended to have a more positive attitude to the method than the forest owner that had not sown. This indicates that they have had a positive experience of the method. Nearly half of those who had not sown had neither a positive nor a negative attitude to it. One possible reason for it is that they had no experience of the method and therefore no opinion. Direct sowing works well to combine with other methods and can be adapted to different conditions. In a time when damage from browsing can cause big problems to regenerations of pine, sowing could be an important tool in the toolbox.

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  • 48.
    Andersson, Jonatan
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Jämförelse av betesskador på sådda och planterade tallplantor - under en tvåårsperiod i södra Östergötland2022Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Denna studie har jämfört betesskadorna i sådda och planterade tallbestånd över en tvåårsperiod. Totalt inventerades sex olika bestånd, varav tre sådda och tre planterade, enligt samma metod som ÄBIN. Resultatet visar en trend mot mindre andel skador i de sådda bestånden men endast en signifikant skillnad i år tvås mätningar för andelen gamla skador och andelen obetade stammar. Skadenivåerna för ÄFO 5 Kinda i Östergötlands län är också enligt ÄBIN betydligt högre än vad studiens resultat visar.

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  • 49.
    Andersson, Kjell
    et al.
    School for Forest Management, Faculty of Forest Sciences, Swedish University of Agriculture.
    Angelstam, Per
    School for Forest Management, Faculty of Forest Sciences, Swedish University of Agriculture / Department of Forestry and Wildlife Management, Inland Norway University of Applied Sciences.
    Brandt, S. Anders
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Geospatial Sciences.
    Axelsson, Robert
    County Administrative Board Västmanland.
    Bax, Gerhard
    Limited GIS skills hamper spatial planning for green infrastructures in Sweden2022In: Geografiska Notiser, ISSN 0016-724X, Vol. 80, no 1, p. 16-35Article in journal (Other academic)
    Abstract [en]

    The term green infrastructure captures the need to conserve biodiversity and to sustain landscapes’ different ecosystem services. Maintaining green infrastructures through protected areas, management and landscape restoration requires knowledge in geography, spatial data about biophysical, anthropogenic and immaterial values, spatial comprehensive planning, and thus geographical information systems (GIS). To understand land use planning practices and planning education regarding GIS in Sweden we interviewed 43 planners and reviewed 20 planning education programmes. All planners used GIS to look at data but did not carry out spatial analyses of land covers. BSc programmes included more GIS than MSc programmes but very few taught analyses for spatial planning. As key spatial planning actors, municipalities’ barriers and bridges for improved GIS use for collaborative learning about green infrastructures are discussed. A concluding section presents examples of how GIS can support spatial planning for green infrastructures.

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    Limited-GIS-skills-hamper-spatial-planning
  • 50.
    Andersson, Maria
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Hur påverkas vårt välmående av korta vistelser i skogen?2021Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Psykisk ohälsa är det vanligaste hälsoproblemet i Sverige och framför allt bland unga. Det är alarmerande siffror som ses öka. Brist på regelbunden återhämtning kan vara en orsak och leda till psykisk ohälsa och utmattning.Vårt ursprung nära naturen påverkar oss även idag och i skogen finns många hälsofördelar att hämta. Där får hjärnan vila från alla intryck vi dagligen utsätts för och vi kan få känna lugn och ro.Denna studie undersökte om och hur korta skogsvistelser påverkar välmående. 10 deltagare fick göra korta skogsvistelser och besvara enkäter före och efter skogsvistelsen för att skatta olika aspekter på välmående. Studien visade att korta skogsvistelser hade en momentan positiv effekt på alla efterfrågade aspekter. Efter 15 min i skogen kände deltagarna sig mer avspända, glada, harmoniska lugna och klartänkta än innan. Långtidseffekter sågs främst på koncentrationsförmåga. Samtliga deltagare uppger att de har fått ett förbättrat välmående efter sina skogsvistelser och åtta av tio uppger ett förbättrat välmående efter studien.

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