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
Tannaz Alizadeh AshrafiSammendrag
Bottom trawling is highly reliant on fossil fuel combustion due to the energy demands of towing heavy nets across the seabed and long-distance steaming. Consequently, it significantly contributes to greenhouse gas emissions and global warming. The volume of CO2 emissions released is influenced by fishers’ harvesting behaviors, shaped by the bioeconomic conditions of the fishery, including fish availability at various locations, distances to home ports, market dynamics, fishing quotas, and regulatory frameworks. In response to increasing concerns over climate change, regulators have proposed fuel taxation as a mitigation strategy. This policy is expected to drive trawlers to adopt new fishing strategies to maintain maximum expected profits while operating under quota management constraints. To explore this dynamic, we developed a system dynamics model to examine how fuel taxation impacts the profit-maximizing harvest patterns of the Norwegian cod trawl fleet. Specifically, we investigate how decisions regarding when, where, and how much cod to fish per trip are influenced by such taxation. Our analysis utilizes haul-by-haul fishing data from 32 Norwegian cod trawlers, spanning the period 2011–2023. Additionally, we assess the effectiveness of fuel taxation in reducing CO2 emissions from the trawl fleet. The findings provide valuable insights into the interplay between regulatory measures and fishers' behavior, with detailed discussions on relevant policy implications.
Forfattere
Jørgen A.B. MølmannSammendrag
Potato with origins from temperate/alpine regions of South America is well suited for agricultural production in the cool climates at high latitudes in Greenland, Iceland, Faroe Islands and northern Fennoscandia. Here, the importance of potato as a staple crop is likely to increase in the future due to global warming. Potentially contributing to a larger share in food production from the north. As well as providing local food security under the risks of unstable geopolitics or natural disasters. Earlier snowmelt and ground thaw extending the growth season within the Midnight Sun period, and a larger accumulated degree day sum is likely to improve production at high latitudes. We have studied the influence of temperature on the minimum light requirement for potato growth under Arctic day lengths. Our results show that the radiation required for high yields increases as temperatures decrease below the optimum for tuber growth. On the other hand, at increasing temperatures the requirement for high irradiance decreases. This means that potato plants may utilize the very long daily photosynthesis periods more efficiently under warmer temperatures at high latitudes in the future. Thus, resulting in potential higher yields and increased profitability for northern potato producers. The latter may counteract some of the current logistical challenges for the potato industry in the high north. This together with agricultural policies centered on self-sufficiency can give cause for optimism among potato producers at high latitudes.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Tannaz Alizadeh AshrafiSammendrag
Det er ikke registrert sammendrag
Forfattere
Jørgen A.B. MølmannSammendrag
Omvisning med orientering om potetforsøk ved BIologisk klimalaboratorium i Tromsø
Forfattere
Helge BerglannSammendrag
Det er ikke registrert sammendrag
Sammendrag
The 2025 update of the Norwegian Red List shows that coastal heathlands remain threatened. Key ongoing threats include abandonment of traditional land use and development of the areas. Recently compiled statistics from habitat mapping provide insights into the ecological condition of the heathlands. The data reveal that more than half of the remaining coastal heathland areas lack active management, putting them at risk of encroachment in the coming years. Moreover, data show that the proportion of areas in the late successional phase is surprisingly low, just over ten percent, despite widespread degradation due to encroachment. This suggests that degraded coastal heathlands are difficult to identify and are likely being misclassified as other habitat types, such as forest. To help field surveyors avoid misidentification, a map illustrating the potential distribution of coastal heathlands in Norway has been developed, along with clear inclusion and exclusion principles. The map extends the previously known northern range of heathlands and reaches south eastward toward heathland areas in Sweden. Norway currently lacks representative monitoring of coastal heathland, as existing programs miss rare habitats. It is therefore a welcome step that the Norwegian Environment Agency now proposes the development of a dedicated monitoring program.
Forfattere
Paal KrokeneSammendrag
Det er ikke registrert sammendrag
Forfattere
Belachew Asalf TadesseSammendrag
Det er ikke registrert sammendrag
Forfattere
Wiktoria Kaczmarek-DerdaSammendrag
Det er ikke registrert sammendrag