Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2012
Forfattere
Halvor SolheimSammendrag
Toppskader på gran i ungskog kan gi store økonomiske tap da det kan bli gankvist eller dobbelttopper i den mest verdifulle delen av stammen. Nå har to uvanlige sopper slått til, og i de mest berørte bestandene kan opp mot to tredjedeler av trærne ha fått skader.
Forfattere
Halvor SolheimSammendrag
I 2009 ble rødbandsjuke første gang registrert i norge, i Bardu og Målselv kommuner i Troms. I 2010-12 er sjukdommen observert i tre områder på Østlandet. Fram til 2012 var angrepne beskjedne, men i år var det kraftige angrep i enkelte bestand, noe som vakte stor oppmerksomhet på en internasjonal konferanse om denne sjukdommen.
Sammendrag
Damage by cone and seed insects is a severe impediment to those producing conifer seeds in seed orchards. The SNS-supported network `Nordic cone and seed insects` has been cooperating to address this problem since 2007. One of the outcomes is the coordinated monitoring of the most important insect species. The data collected form a basis for establishing strategies for pest management.
Forfattere
Andreas TreuSammendrag
Improving wood preservation techniques can contribute substantially to reducing waste and avoiding negative environmental impacts. Dr Andreas Treu outlines a promising technique to dramatically reduce or even stop wood degradation altogether by using electro-osmosis. International Innovation is the leading global dissemination resource for the wider scientific, technology and research communities, dedicated to disseminating the latest science, research and technological innovations on a global level. More information and a complimentary subscription offer to the publication can be found at: www.researchmedia.eu
Forfattere
Severin WoxholttSammendrag
Det er ikke registrert sammendrag
Forfattere
Lone Ross Gobakken Mats WestinSammendrag
Environmentally sound wooden facades with long service lives and acceptable appearance are desired. Several types of modified wood are used in building applications to fulfil those requirements, but there is a potential for using more modified wood material. In facades modified wood are often used without any surface treatment or coating, but some sort of coating are desired and requested in a segment of the potential marked. Finding suitable coating systems for modified wood can be a challenge, and the objective of this study was to evaluate the long time performance of modified wood substrates in combinations with different coating systems after 8 years of outdoors exposure. Furthermore, evaluations at 4 and 8 years were compared to study the quantitative mould growth in a very late stage of the test period to capture any deviant behaviour from the traditional growth curve. Three coating systems were applied on furfurylated Scots pine, acetylated Scots pine, thermally modified Scots pine, oil/thermally modified Scots pine, thermally modified Norway spruce, and three reference wood substrates, and exposed outdoors for 8 years to evaluate their ability to resist surface moulds and blue stain fungi, cracking and flaking. The test was carried out according to EN 927-3. After 8 years mould growth, cracking and flaking mainly varied with type of coating where the tendency was that a waterborne system had the lowest rating for both mould growth, cracking and flaking. Oil/thermally modified treated pine had the lowest mould rating of the modified substrates. Acetylated pine had a decrease in mould rating from year 4 to year 8 when coated with the best coating system and a very small increase when coated with the second best system. Acetylated pine tended to have less flaking than the other modified substrates. Furthermore, acetylated pine, thermally modified pine and thermally modified spruce tended to have the least cracking of the modified wood substrates.
Forfattere
Anne B. NilsenSammendrag
Den XXII Congress of the International Society for Photogrammetry and Remote Sensing (ISPRS) ble arrangert i Melbourne, Australia, 25. august-1. september i år. Drøye 1900 deltagere fra 74 land hadde funnet veien til Melbourne. Norge stilte sterkt med 8 deltagere og 3 foredrag.
Forfattere
Marie L. Davey Einar Heegaard Rune Halvorsen Mikael Ohlson Håvard KauserudSammendrag
Bryophytes are a dominant vegetation component of the boreal forest, but little is known about their associated fungal communities, including seasonal variation within them.Seasonal variation in the fungal biomass and composition of fungal communities associated with three widespread boreal bryophytes was investigated using HPLC assays of ergosterol and amplicon pyrosequencing of the internal transcribed spacer 2 (ITS2) region of rDNA.The bryophyte phyllosphere community was dominated by Ascomycota. Fungal biomass did not decline appreciably in winter (P = 0.272). Significant host-specific patterns in seasonal variation of biomass were detected (P = 0.003). Although seasonal effects were not the primary factors structuring community composition, collection date significantly explained (P = 0.001) variation not attributed to locality, host, and tissue. Community homogenization and a reduction in turnover occurred with the onset of frost events and subzero air and soil temperatures. Fluctuations in the relative abundance of particular fungal groups seem to reflect the nature of their association with mosses, although conclusions are drawn with caution because of potential methodological bias.The moss-associated fungal community is dynamic, exhibiting seasonal turnover in composition and relative abundance of different fungal groups, and significant fungal biomass is present year-round, suggesting a winter-active fungal community.
Forfattere
Casper Claudi Rasmussen Erlend NybakkSammendrag
This study examines the relationship between customer orientation, innovativeness, autonomy, risk taking, growth willingness and growth in low technology micro-firms. A survey was sent to 3000 CEOs in the Norwegian wood industry and resulted in 514 usable respondents. Customer orientation, innovativeness, risk taking, autonomy and growth were conceptualized and analyzed as first order constructs using confirmatory factor analysis and OLS regression. The findings showed that customer orientation, innovativeness and autonomy have a significant impact on growth in micro-firms. The study found no support for interaction effects between innovativeness, autonomy, risk taking and customer orientation, however the interaction effect between customer orientation and autonomy was significant at the 10% level.
Forfattere
Carl Gunnar Fossdal Ari M. Hietala Igor A. Yakovlev Gustav Vaaje-Kolstad Emil Stefaczyk Halvor SolheimSammendrag
The GH61 represents the most enigmatic Glycoside Hydrolase Family (GH) regarding putative enzymatic activity and importance in cellulose degradation. Heterobasidion irregulare is a necrotizing pathogen and white rot fungus, causing enormous damages in conifer forests.The genome of H. irregulare allowed identification of ten HiGH61 genes. qRT-PCR analysis separate the HiGH61 members into two groups; one that show up regulation on lignocellulosic substrates and another that show either down regulation or constitutive expression. This grouping suggests that the fungus relates different sets of GH61s for different substrates, like in the various stages of necrotizing and saprophytic growth on the host.One HiGH61 showed up to 17000 fold increase on spruce heartwood suggesting a pivotal role in cellulose decomposition during saprophytic growth. Sequence analysis of these genes reveals that all GH61s but one possess the conserved metal binding motif predicted to be essential for activity.The sequences also divide into groups having either an insert near the N-terminus or an insert near the second catalytic histidine, which both may represent extensions of the substrate binding surface. Three HiGH61s encode cellulose-binding modules (CBM1), indicating direct targeting of crystalline cellulose, two being up regulated on pure cellulose.There was a common substrate-specific induction patterns of the HiGH61s with several reference cellulolytic and hemicellulolytic GHs, this taken together with their low levels on media lacking lignocellulose, reflect the concerted nature of cell wall polymer degradation.