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.
2025
Forfattere
Anna Skarin Minna Turunen Svein Eilertsen Heidi Rautiainen Tim Horstkotte Camilla Risvoll Anna-Marja Kaddik Tom Lifjell Majken Paulsen Laura Post Sirpa Rasmus Hans Tømmervik Birgitta ÅhmanSammendrag
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Forfattere
Jutta KapferSammendrag
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Sammendrag
Bestandsskogbruket ga grunnlaget for store mengder elg. Hogstflater ble elgens spiskammers. Men er nirvana i ferd med å bli nemesis? Hogstflatene er i endring, og det ser ut til å gå i disfavør av elgen. Dette kan skogbruket bidra til å motvirke.
Sammendrag
Climatic changes have led to an increased need for development of green energy and subsequent use of areas for such development, areas that historically have been used by Sami reindeer herders as grazing areas for their animals. Parallel to this, climatic changes and development of new technology, has, and will most likely continue to affect and change the traditional way of herding reindeer. This report has investigated if the necessary advisory services are available for reindeer herders in Norway to meet these changes and if the advisory services available today needs to be reorganized, strengthened or expanded in order to be sufficient for the reindeer herders needs.
Forfattere
Erling MeisingsetSammendrag
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Forfattere
Erling MeisingsetSammendrag
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Sammendrag
The timing of migration is fundamental for species exploiting seasonally variable environments. For ungulates, earlier spring migration is expected with earlier vegetation green-up. However, other drivers, such as access to agricultural farmland and variation in local conditions, are also known to affect migration. We investigated the timing of spring migration for 96 male and 201 female red deer (Cervus elaphus) using a long-term dataset (2005–2020). Overall, the timing of migration was mainly characterized by large individual variability between and within years (95% range 6 April to 18 June). The spring migration timing was, as expected, later with colder winter and spring conditions (North Atlantic Oscillation (NAO) winter and April indices) and later peak vegetation green-up (NDVI), with a five-day delay in green-up causing a migration delay of 1.2 days. Timing was also influenced by local conditions in summer and winter home ranges. Red deer with greater access to farmland and a more variable topography (hence variable plant phenology) in winter delayed migration. Similarly, individuals with higher-elevation summer ranges (with delayed onset of plant growth) also delayed migration. Our analyses highlight that the timing of red deer migration is determined by multiple drivers affecting foraging conditions in the landscape, indicative of considerable phenotypic plasticity.
Sammendrag
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Sammendrag
Large herbivores at northern latitudes often forage on agricultural farmland. In these populations, the presence of both resident and migrant individuals (termed partial migration) is common, but how migrants and residents differ in their selection of farmland is not well-understood. Higher access to farmland may provide benefits to residents compensating for not following the ‘green wave’ of emerging vegetation such as migrants. According to sexual segregation theory, males and females differ in body-size-related nutritional needs and risk sensitivity associated with farmland. Yet, how the sexes differ in the selection of farmland through an annual cycle remains unclear. We quantified seasonal variation in the selection of farmland by partially migratory red deer (Cervus elaphus) at broad, landscape scale and at fine, within-home range scale using 16 years of data (2005–2020) from 329 females and 115 males in Norway. We tested predictions related to the partial migration and sexual segregation theories using resource selection functions. We predicted higher selection for farmland by residents than by migrants, and higher selection by females than by males due to higher nutritional needs, but that higher perceived predation risk would impact their diurnal selection patterns. The time spent on farmland was higher in winter (14%–18%) than in summer (8%–14%). Residents selected farmland more than migrants mainly at broad, landscape scale, while differences were smaller and less consistent at a fine, within-home range scale. Females showed higher broad-scale selection for farmland in winter, whereas males showed higher selection in summer. At a fine, within-home range scale, females selected farmland more in summer during darkness, whereas sex differences were small otherwise. The fine-scale selection of farmland was markedly higher during low-light conditions than in daylight. A high population density index was correlated with high broad-scale selection of farmland, i.e. high farmland availability in the home ranges, whereas the effect of the density index was weak at a fine, within-home range scale. Our study emphasises how hypotheses deriving from the theories of partial migration and sexual segregation can improve our understanding of ungulates' selection of farmland. The higher selection by residents during summer highlights the importance of retaining landscape connectivity, allowing for migration and reducing pressure on local resources.
Foredrag – Status hjorteforvaltningen i Møre og Romsdal - Hvordan ser framtida ut?
Erling Meisingset
Forfattere
Erling MeisingsetSammendrag
Det er ikke registrert sammendrag