Institutt for arktisk og marin biologi: Nye registreringer
Viser treff 241-260 av 2012
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Analyzing the Geometry and Dynamics of Viral Structures: A Review of Computational Approaches Based on Alpha Shape Theory, Normal Mode Analysis, and Poisson–Boltzmann Theories
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-13)The current SARS-CoV-2 pandemic highlights our fragility when we are exposed to emergent viruses either directly or through zoonotic diseases. Fortunately, our knowledge of the biology of those viruses is improving. In particular, we have more and more structural information on virions, i.e., the infective form of a virus that includes its genomic material and surrounding protective capsid, and ... -
Estimating Surface Concentrations of Calanus finmarchicus Using Standardised Satellite-Derived Enhanced RGB Imagery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-08)Calanus finmarchicus is a keystone zooplankton species that is commercially harvested and is critical in sustaining many important fisheries in the North Atlantic. However, due to their patchy population distributions, they are notoriously difficult to map using traditional ship-based techniques. This study involves the use of a combined approach of standardized ocean colour imagery and radiative ... -
Weak seasonality in benthic food web structure within an Arctic inflow shelf region
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-08-23)The Arctic Ocean is characterized by pronounced seasonality in the quantity and quality of organic matter exported from the surface ocean. While it is well established that changes in food availability can alter the abundance, biomass and function of benthic organisms, the impact on food web structure is not well studied. We used bulk carbon and nitrogen stable isotope analysis to assess the quantity ... -
The One Ocean Expedition: Science and Sailing for the Ocean We Want
(Research report; Forskningsrapport, 2023-08-24)The One Ocean Expedition (OOE) was a 20-month long circumnavigation of the globe by the Norwegian sail training vessel Statsraad Lehmkuhl, and a recognised part of the UN decade of Ocean Science for Sustainable Development. The ship was equipped with modern instrumentation to collect high-quality data on ocean physics, chemistry, and biology. Many of the data series were available in near real time ... -
Cruise report Hywind Tampen 13 to 28 March 2023 - Cruise no. 2023001004 G.O. Sars
(Research report; Forskningsrapport, 2023)There is very little knowledge related to how floating windfarms effect the marine environment as this is such a new “product”. Thus, the data that we gathered on this cruise will be novel in that sense. The aim of the cruise was to look at possible effects of the windfarm on the marine environment. Based on limited cruise time and tough weather conditions around Hywind Tampen we had to be selective ... -
Potential effects of petroleum pollution and increasing water temperature on life-history traits in polar cod (Boreogadus saida)
(Conference object; Konferansebidrag, 2017) -
Earlier sea-ice melt extends the oligotrophic summer period in the Barents Sea with low algal biomass and associated low vertical flux
(Journal article; Tidsskriftartikkel, 2023-03-27)The decrease in Arctic sea-ice extent and thickness as a result of global warming will impact the timing, duration, magnitude and composition of phytoplankton production with cascading effects on Arctic marine food-webs and biogeochemical cycles. Here, we elucidate the environmental drivers shaping the composition, abundance, biomass, trophic state and vertical flux of protists (unicellular eukaryotes), ... -
Seafloor warm water temperature anomalies impact benthic macrofauna communities of a high-Arctic cold-water fjord
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-05)Amid the alarming atmospheric and oceanic warming rates taking place in the Arctic, western fjords around the Svalbard archipelago are experiencing an increased frequency of warm water intrusions in recent decades, causing ecological shifts in their ecosystems. However, hardly anything is known about their potential impacts on the until recently considered stable and colder northern fjords. We ... -
Fifteen research needs for understanding climate change impacts on ecosystems and society in the Norwegian High North
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-07)There is an urgent need to understand and address the risks associated with a warming climate for ecosystems and societies in the Arctic and sub-Arctic regions. There are major gaps in our understanding of the complex effects of climate change—including extreme events, cascading impacts across ecosystems, and the underlying socioecological dynamics and feedbacks—all of which need collaborative efforts ... -
Pathogen Exposure in White Whales (Delphinapterus leucas) in Svalbard, Norway
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-29)The Svalbard white whale (Delphinapterus leucas) population is one of the smallest in the world, making it particularly vulnerable to challenges such as climate change and pathogens. In this study, serum samples from live captured (2001-2016) white whales from this region were investigated for influenza A virus (IAV) antibodies (Abs) (n = 27) and RNA (n = 25); morbillivirus (MV) Abs (n = 3) and RNA ... -
Assessing public perception and willingness to pay for renewable energy in Pakistan through the theory of planned behavior
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-16)With growing urbanization and increasing world population, energy demand also increases. A significant portion of the world’s energy comes from fossil fuels, and these sources of energy are declining rapidly at the current consumption rate. There are also growing environmental concerns on the use of fossil fuels increasing greenhouse gas emissions. In this regard, renewable energy (RE) shows promising ... -
The circumpolar impacts of climate change and anthropogenic stressors on Arctic cod (Boreogadus saida) and its ecosystem
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-08-08)Arctic cod biomass are predicted. In most Arctic seas, the relative abundance of Arctic cod within the fish community will likely fluctuate in accordance with cold and warm periods. A reduced abundance of Arctic cod will negatively affect the abundance, distribution, and physiological condition of certain predators, whereas some predators will successfully adapt to a more boreal diet. Regional ... -
Spring phytoplankton distributions and primary productivity in waters off northern Norway
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-04-13)The distributions of phytoplankton, zooplankton and hydrographic features off the coast of northern Norway were assessed in late April – early May 2019 using ship-based observations (CTD casts and Moving Vessel Profilers) and autonomous vehicles. A satellite chlorophyll climatology was generated to place our in-situ observations within a longer temporal sequence. Substantial spatial and temporal ... -
Limited predatory effects on infaunal macrobenthos community patterns in intertidal soft-bottom of Arctic coasts
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-01-24)Predation shapes marine benthic communities and affects prey species population dynamics in tropic and temperate coastal systems. However, information on its magnitude in systematically understudied Arctic coastal habitats is scarce. To test predation effects on the diversity and structure of Arctic benthic communities, we conducted caging experiments in which consumers were excluded from plots at ... -
Salmon-lice as a potential threat to anadromous Arctic charr populations
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-01-25)Salmon-lice have the potential to change the behaviour and growth of their salmonid host species. Here, the baseline infection levels of salmon-lice of post-smolts (n = 815) and veteran migrants (n = 875) of sea-run Arctic charr (Salvelinus alpinus Linnaeus, 1758) were monitored over two successive years in a sub-Arctic Norwegian fjord without farming of salmonids. All Arctic charr were collected ... -
Quantitative fatty acid signature analysis reveals a high level of dietary specialization in killer whales across the North Atlantic
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-04-13)Quantifying the diet composition of apex marine predators such as killer whales (Orcinus orca) is critical to assessing their food web impacts. Yet, with few exceptions, the feeding ecology of these apex predators remains poorly understood. <p>Here, we use our newly validated quantitative fatty acid signature analysis (QFASA) approach on nearly 200 killer whales and over 900 potential prey to model ... -
Modelling the control of bovine brucellosis in India
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-08)Brucellosis imposes substantial impacts on livestock production and public health worldwide. A stochastic, age-structured model incorporating herd demographics was developed describing within- and between-herd transmission of Brucella abortus in dairy cattle herds. The model was fitted to data from a cross-sectional study conducted in Punjab State of India and used to evaluate the effectiveness of ... -
Ecological effects of mosquito control with Bti: evidence for shifts in the trophic structure of soil- and ground-based food webs
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-08)The microbial control agent <i>Bacillus thuringiensis</i> var. <i>israelensis</i> (Bti) has been successfully used worldwide to reduce abundances of biting Nematocera (Diptera), often with little direct impact on non-target organisms observed. However, the potential for additional indirect effects on other ecosystem properties, including on trophic linkages within food webs, is poorly known. We ... -
A semi-automatic workflow to process images from small mammal camera traps
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-05)Camera traps have become popular for monitoring biodiversity, but the huge amounts of image data that arise from camera trap monitoring represent a challenge and artificial intelligence is increasingly used to automatically classify large image data sets. However, it is still challenging to combine automatic classification with other steps and tools needed for efficient, quality-assured and adaptive ... -
A retrospective investigation of feather corticosterone in a highly contaminated white-tailed eagle (Haliaeetus albicilla) population
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-04-16)Exposure to persistent organic pollutants (POPs), such as organochlorines (OCs) and polybrominated diphenyl ethers (PBDEs), is associated with adverse health effects in wildlife. Many POPs have been banned and consequently their environmental concentrations have declined. To assess both temporal trends of POPs and their detrimental impacts, raptors are extensively used as biomonitors due to their ...