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.
2018
Forfattere
Shane C. Frank Martin Leclerc Fanie Pelletier Frank Narve Rosell Jon Swenson Richard Bischof Jonas Kindberg Hans Geir Eiken Snorre Hagen Andreas ZedrosserSammendrag
1. There is a growing recognition of the importance of indirect effects from hunting on wildlife populations, e.g., social and behavioral changes due to harvest, which occur after the initial offtake. Nonetheless, little is known about how the removal of members of a population influences the spatial configuration of the survivors. 2. We studied how surviving brown bears (Ursus arctos) used former home ranges that had belonged to casualties of the annual bear hunting season in southcentral Sweden (2007-2015). We used resource selection functions to explore the effects of the casualty's and survivor's sex, age, and their pairwise genetic relatedness, population density, and hunting intensity on survivors' spatial responses to vacated home ranges. 3. We tested the competitive release hypothesis, whereby survivors that increase their use of a killed bear’s home range are presumed to have been released from intraspecific competition. We found strong support for this hypothesis, as survivors of the same sex as the casualty consistently increased their use of its vacant home range. Patterns were less pronounced or absent when the survivor and casualty were of opposite sex. 4. Genetic relatedness between the survivor and the casualty emerged as the most important factor explaining increased use of vacated male home ranges by males, with a stronger response from survivors of lower relatedness. Relatedness was also important for females, but it did not influence use following removal; female survivors used home ranges of higher related female casualties more, both before and after death. Spatial responses by survivors were further influenced by bear age, population density, and hunting intensity. 5. We have showed that survivors exhibit a spatial response to vacated home ranges caused by hunting casualties, even in non-territorial species such as the brown bear. This spatial reorganization can have unintended consequences for population dynamics and interfere with management goals. Altogether, our results underscore the need to better understand the shortand long-term indirect effects of hunting on animal social structure and their resulting distribution in space. Spatial response, kinship, competition, spatial reorganization, harvest, social structure
Forfattere
Nicholas Clarke Silje Skår O. Janne Kjønaas Kjersti Holt Hanssen Tonje Økland Jørn-Frode Nordbakken Toril Drabløs Eldhuset Holger LangeSammendrag
Short-term (three to four years) effects of forest harvesting on soil solution chemistry were investigated at two Norway spruce sites in southern Norway, differing in precipitation amount and topography. Experimental plots were either harvested conventionally (stem-only harvesting, SOH) or whole trees, including crowns, twigs and branches were removed (whole-tree harvesting, WTH), leaving residue piles on the ground for some months before removal. The WTH treatment had two sub-treatments: WTH-pile where there had been piles and WTH-removal, from where residues had been removed to make piles. Increased soil solution concentrations of NO3–N, total N, Ca, Mg and K at 30 cm depth, shown by peaks in concentrations in the years after harvesting, were found at the drier, less steep site in eastern Norway after SOH and WTH-pile, but less so after WTH-removal. At the wetter, steeper site in western Norway, peaks were often observed also at WTH-removal plots, which might reflect within-site differences in water pathways due largely to site topography.
2017
Sammendrag
Forskere er i ferd med å utvikle radiobrikker som gjør det mulig å øremerke reinen og overvåke dens bevegelser.
Sammendrag
Skogens helse er god – men se opp for døende asketrær, barkbiller i Midt-Norge og store skader på bjørk i nord. Det konkluderer en ny rapport.
Sammendrag
Gjødsling av skog er et svært lønnsomt tiltak – både for lommebok og klimaet på kloden.
Sammendrag
Nye satellitter gir bedre kunnskap om jord, skog, fjell og utmark
Sammendrag
Skogforskningen i Norge, representert ved Norsk institutt for bioøkonomi (NIBIO), ble tildelt Eidsvold Værks skogpris under konferansen Skog og tre 2017. Prisen deles årlig ut til en organisasjon eller en person som har gjort en spesiell innsats for å fremme skogbruk i Norge.
Sammendrag
Røye, sik og ørret kommer bedre overens enn tidligere antatt. Det er gode nyheter for fritidsfiskerne.
Sammendrag
De nye Sentinel-satellittene gir Norge flere og bedre bilder av både jord og skog. Dette kan gi økt matproduksjon, bedre utnyttelse av skogressursene og mindre forurensing.
Forfattere
Michelle Fountain Jerry Cross Catherine Baroffio David Hall D. Farman Anna-Karin Borg-Karlson Raimondas Mozuraitis Baiba Ralle Lene Sigsgaard Nina Trandem Atle WibeSammendrag
Advances in the identification of attraction of mirids to semiochemicals has provided the opportunity to exploit synthetically produced sex pheromones and plant produced compounds for controlling pest species in crops. Sex pheromones of mirids are important for long range attraction of males to females and plant volatiles indicate egg laying sites for female mirids. The European tarnished plant bug (Lygus rugulipennis) causes large yield losses (10->80%) in conventional and organic strawberry. Following the successful development of these semiochemicals in combination with effective traps we investigated the ability of a mass trapping system to reduce damage in strawberry crops in combination with another strawberry pest, strawberry blossom weevil (Anthonomus rubi). Attractive traps and lures with host plant volatiles and sex or aggregation pheromones were deployed in strawberry crops at 50 per hectare in several European countries. Trap catches were monitored in relation to fruit damage and compared to untreated crops. Traps successfully captured both target pest species. In this paper we will present the results of the potential to reduce crop damage using mass traps and discuss the benefits and difficulties in using these techniques as part of integrated or organic pest management.