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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.

2019

Sammendrag

Nordland fagskole utvikler utdanning innen bærekraftige matopplevelser, på bakgrunn av erfaringer fra studietilbud Mat og matkultur ved Høgskolen i Nesna/Bioforsk (2005-2014). Prosjektgruppa inviterer fagskoler med relaterte fag til samarbeid. Fagskolen i Hordaland, Trondheim fagskole, Nordland reiselivsfagskole og Fagskolen Innlandet ønsker å utfylle hverandre slik at bransjene får et samlet utdanningstilbud med god faglig bredde og dybde.

Sammendrag

Påskelam er et kjent begrep, men kan ha ulike betydninger. Påsken forbindes med lam rundt om på sauegårdene i Norge – men da i sprell levende live, hoppende og lekende i full fart, når de ikke spiser eller sover. Påskelam på tallerkenen er imidlertid også å finne, og nest etter "fårikål-sesongen" har nordmenn størst forbruk av lam i påsken. Lammelår til påske har ingen lang tradisjon i Norge. Vil du vite hvorfor?

Sammendrag

Den økte interessen for lokalmat og autentiske matopplevelser gir konkurransefortrinn for spisesteder som tilbyr denne type særegne kvaliteter. Miljøutfordringene verden står overfor, styrker oppmerksomheten omkring bruk av natur- og kulturverdier i opplevelsesproduksjonen. Det er derfor en voksende trend å tilby lokale råvarer og lokale spesialiteter. Dette åpner for muligheter for økt bærekraftig verdiskaping i utkantstrøk, der matproduksjonen foregår – som igjen gir grunnlag for bosetting og levende bygder. Hvis mulighetene fullt ut skal la seg realisere, kreves tverrfaglig kompetanseheving langs verdikjeden fra jord og fjord til bord.

Til dokument

Sammendrag

Interspecific brood parasitism is common in many animal systems. Brood parasites enter the nests of other species and divert host resources for producing their own offspring, which can lead to strong antagonistic parasite–host coevolution. Here, we look at commonalities among social insect species that are victims of brood parasites, and use phylogenetic data and information on geographical range size to predict which species are most probably to fall victims to brood parasites in the future. In our analyses, we focus on three eusocial hymenopteran groups and their brood parasites: (i) bumblebees, (ii) Myrmica ants, and (iii) vespine and polistine wasps. In these groups, some, but not all, species are parasitized by obligate workerless inquilines that only produce reproductive-caste descendants.We find phylogenetic signals for geographical range size and the presence of parasites in bumblebees, but not in ants and wasps. Phylogenetic logistic regressions indicate that the probability of being attacked by one or more brood parasite species increases with the size of the geographical range in bumblebees, but the effect is statistically only marginally significant in ants. However, non-phylogenetic logistic regressions suggest that bumblebee species with the largest geographical range sizes may have a lower likelihood of harbouring social parasites than do hosts with medium-sized ranges. Our results provide new insights into the ecology and evolution of host–social parasite systems, and indicate that host phylogeny and geographical range size can be used to predict threats posed by social parasites, as well to design efficient conservation measures for both hosts and their parasites. This article is part of the theme issue ‘The coevolutionary biology of brood parasitism: from mechanism to pattern’.

Til dokument

Sammendrag

Surface mould growth contributes to the colour changes of outdoor exposed wood over time. Modelling mould growth can thus help visualize wooden facades’ colour development, which can improve facade design and service life. However, existing wood mould models do not consider transient wetting effects that occur outdoors due to precipitation and condensation. To address this, four mould models were evaluated using laboratory experimental data that included exposure to transient wetting. First, the models (the original and the updated VTT model, the biohygrothermal model and the mould resistance design (MRD) model) were evaluated for Scots pine sapwood. For this evaluation, the transient wetting effect was implemented in the models by using hourly wood surface relative humidity (RH), calculated from electrical resistance measurements, as input. This showed that the original and the updated VTT model gave best fit to the experimental data. However, further evaluation of these two models for more wood materials showed that the updated VTT model was sensitive to the choice of material parameters. Large discrepancies occurred when varying the material parameters in the updated VTT model. Finally, different estimates of RH were tested in the original VTT model. Using wood surface RH as input gave best fit to the experimental data, and ambient air RH gave poorest fit. Overall, the results indicate that the original VTT model is fairly reliable and can be used to predict mould growth on wooden claddings exposed to transient wetting as long as the wood surface climate is used as climatic input data.