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.
2021
Forfattere
Thomas Holm CarlsenSammendrag
NIBIO har foretatt en sårbarhetsanalyse i forbindelse med en mulighetsstudie for å utvikle fugleturisme på Støtt, Meløy kommune. Analysen tar utgangspunkt i kartlegging av fuglelivet under hekkesesongen i relasjon med planene om å sette opp tre fugleskjul på Innerstøtt og Svenningen. Fugleskjulene er designet av arkitektfirmaet Biotope. Det er et mål og ønske fra grunneier og driver av Støtt brygge å utvikle et reiselivskonsept basert på fuglelivet på og rundt Støtt. Utviklinga må skje i en bærekraftig kontekst der man sikrer at fuglenes tåleevne og sårbarhet blir prioritert og tatt hensyn til.
Forfattere
Thomas Holm CarlsenSammendrag
NIBIO har foretatt en sårbarhetsanalyse i forbindelse med en mulighetsstudie for å utvikle fugleturisme på Lovund, Lurøy kommune. Analysen tar utgangspunkt i kartlegging av fuglelivet under hekkesesongen i relasjon med planene om å sette opp fem fugleskjul på ulike steder på Lovund. Fugleskjulene er designet av arkitektfirmaet Biotope. Det er et mål og ønske fra driver av Lovund Hotell å utvikle et reiselivskonsept basert på fuglelivet på og rundt Lovund. Utviklinga må skje i en bærekraftig kontekst der man sikrer at fuglenes tåleevne og sårbarhet blir prioritert og tatt hensyn til.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Anne Linn HykkerudSammendrag
Det er ikke registrert sammendrag
Sammendrag
Organisms use circadian rhythms to anticipate and exploit daily environmental oscillations. While circadian rhythms are of clear importance for inhabitants of tropic and temperate latitudes, its role for permanent residents of the polar regions is less well understood. The high Arctic Svalbard ptarmigan shows behavioral rhythmicity in presence of light-dark cycles but is arrhythmic during the polar day and polar night. This has been suggested to be an adaptation to the unique light environment of the Arctic. In this study, we examined regulatory aspects of the circadian control system in the Svalbard ptarmigan by recording core body temperature (Tb) alongside locomotor activity in captive birds under different photoperiods. We show that Tb and activity are rhythmic with a 24-h period under short (SP; L:D 6:18) and long photoperiod (LP; L:D 16:8). Under constant light and constant darkness, rhythmicity in Tb attenuates and activity shows signs of ultradian rhythmicity. Birds under SP also showed a rise in Tb preceding the light-on signal and any rise in activity, which proves that the light-on signal can be anticipated, most likely by a circadian system.
Forfattere
Gunnhild SøgaardSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
To increase the annual uptake of CO2 as well as the long-term storage of carbon (C) in forests, the Norwegian government consider large-scale replacements of native, deciduous forests with faster-growing species like Norway spruce. To assess the effects of tree species change on ecosystem C and nitrogen (N) stocks and soil chemistry, we used a paired plot approach including stands of native downy birch and planted 45 – 60-year-old Norway spruce. The birch stands were used as reference for the assessment of differences following the tree species change. We found significantly higher C and N stocks in living tree biomass in the spruce stands, whereas no significant differences were found for dead wood. The cover of understory species groups, and the C and N stocks of the aboveground understory vegetation was significantly higher in the birch stands. The tree species change did not affect the soil organic carbon (SOC) stock down to 1 m soil depth; however, the significantly higher stock in the forest floor of the spruce stands suggested a re-distribution of SOC within the profile. There was a significant positive correlation between the SOC stock down to 30 cm soil depth and the total ecosystem C stock for the birch stands, and a negative correlation for the spruce stands. Significant effects of tree species change were found for C and N concentrations, C/N, exchangeable acidity, base saturation, and exchangeable Ca, K, Mg, Na, S, and Fe in the organic horizon or the upper mineral soil layer. The total ecosystem C stock ranged between 197 and 277 Mg ha-1 for the birch stands, and 297 and 387 Mg ha-1 for the spruce stands. The ecosystem C accumulation varied between 32 and 142 Mg ha-1 over the past 45-60 years, whereas the net ecosystem C capture was considerably lower and potentially negative. Our results suggest that the potential to meet the governments’ targets to increase C sequestration depend on the C debt incurred from the removed birch stands, the rotation length, and potentially also the susceptibility of the different stand types to future risk factors related to climate change.
Forfattere
Katherine Ann Gredvig NielsenSammendrag
Det er ikke registrert sammendrag
Forfattere
Kristian Muri Knausgård Siv Skar Filippo Sanfilippo Albert Buldenko Henning Lindheim Jakob Lunde Eligijus Sukarevicius Kjell Gunnar RobbersmyrSammendrag
Aquaponic systems are engineered ecosystems combining aquaculture and plant production. Nutrient rich water is continuously circulating through the system from aquaculture tanks. A biofilter with nitrifying bacteria breaks down fish metabolism ammonia into nitrite and nitrate, which plants and makes the aquaculture wastewater into valued organic fertiliser for the plants, contenting essential macro and micro elements. At the same time, plants are cleaning the water by absorbing ammonia from the fish tanks before it reaches dangerous levels for the aquatic animals. In principle, the only external input is energy, mainly in the form of light and heat, but fish food is also commonly provided. Growing fish food is potentially feasible in a closed loop system, hence aquaponic systems can possibly be an important source of proteins and other important nutrition when, for example, colonising other planets in the future. Fully autonomous aquaponic systems are currently not available. This work aims at minimising manual labour related to cleaning pipes for water transport. The cleaning process must be friendly to both plants and aquatic animals. Hence, in this work, pure mechanical cleaning is adopted. A novel belt-driven continuum robot capable of travelling through small/medium diameter pipes and manoeuvring branches and bends, is designed and tested. The robot is modular and can be extended with different cleaning modules through an interface providing CAN-bus network and electric power. The flexible continuum modules of the robot are characterised. Experimental results demonstrate that the robot is able to travel through pipes of diameter 50 mm to 75 mm, and also capable of handling T-branches of up to 90 degrees.