Artikler, rapporter og annet (arktisk og marin biologi): Nye registreringer
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Ocular Histopathological Findings in Semi-Domesticated Eurasian Tundra Reindeer (Rangifer tarandus tarandus) with Infectious Keratoconjunctivitis after Experimental Inoculation with Cervid Herpesvirus 2
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-09)Infectious keratoconjunctivitis (IKC) is a common transmissible ocular disease in semi-domesticated Eurasian tundra reindeer (<i>Rangifer tarandus tarandus</i>). In large outbreaks, IKC may affect tens of animals in a herd, with the most severe cases often requiring euthanasia due to the destruction of the affected eyes and permanent blindness. An experimental inoculation with cervid herpesvirus 2 ... -
Life history genomic regions explain differences in Atlantic salmon marine diet specialization
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-08-16)1. Animals employ various foraging strategies along their ontogeny to acquire energy, and with varying degree of efficiencies, to support growth, maturation and subsequent reproduction events. Individuals that can efficiently acquire energy early are more likely to mature at an earlier age, as a result of faster energy gain which can fuel maturation and reproduction.<p><p> 2. We aimed to test the ... -
Pan-Arctic analysis of cultural ecosystem services using social media and automated content analysis
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-02)In the Arctic, as in many parts of the world, interactions with the natural world are an important part of people's experience and are often recorded in photographs. Emerging methods for automated content analysis of social media data offers opportunities to discover information on cultural ecosystem services from photographs across large samples of people and countries. We analysed over 800 000 ... -
The Impact of Methane on Microbial Communities at Marine Arctic Gas Hydrate Bearing Sediment
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-24)Cold seeps are characterized by high biomass, which is supported by the microbial oxidation of the available methane by capable microorganisms. The carbon is subsequently transferred to higher trophic levels. South of Svalbard, five geological mounds shaped by the formation of methane gas hydrates, have been recently located. Methane gas seeping activity has been observed on four of them, ... -
Research gaps and trends in the Arctic tundra: a topic-modelling approach
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-18)Climate change is affecting the biodiversity, ecosystem services and the well-being of people that live in the Arctic tundra. Understanding the societal implications and adapting to these changes depend on knowledge produced by multiple disciplines. We analysed peer-reviewed publications to identify the main research themes relating to the Arctic tundra and assessed to what extent current research ... -
Integrating dispersal along freshwater ecosystems into species distribution models
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-08-29)<i>Aim</i> - Our ability to model species distributions and abundances is a valuable ecological tool in predicting future distributions of species. Effectively incorporating connectivity into these predictions is crucial; however, many connectivity measures utilize metrics which may not have a direct relation to the dispersal capacity of the species they are attempting to model. The identification ... -
Assessment of risk of introduction of Echinococcus multilocularis to mainland Norway
(Research report; Forskningsrapport, 2012-02-15)In the light of the recent findings of the tapeworm Echinococcus multilocularis (EM) in four red foxes from three different locations in Sweden, the Norwegian Scientific Committee for Food Safety (Vitenskapskomiteen; VKM), Panel of Biological Hazards (Faggruppe hygiene og smittestoffer) took the initiative to undertake a risk assessment regarding the probability of this parasite being introduced to ... -
Development of 14 microsatellite markers for zoonotic tapeworm dibothriocephalus dendriticus (Cestoda: Diphyllobothriidea)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-12)<i>Dibothriocephalus dendriticus</i> is one of the causative agents of the fish-borne zoonosis diphyllobothriosis. Polymorphic microsatellite markers were originally developed for future genetic studies using microsatellite library screening and next-generation sequencing (NGS). Out of 128 microsatellite candidates selected after NGS analysis, 126 yielded PCR products of the expected size. A declared ... -
Selection and validation of reliable reference genes for gene expression studies from Monilinia vaccinii-corymbosi infected wild blueberry phenotypes
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-16)Monilinia blight disease caused by <i>Monilinia vaccinii-corymbosi</i> (Reade) Honey (<i>M.vc</i>) causes severe damage and economic losses in wild blueberry growing regions. Molecular mechanisms regulating defence responses of wild blueberry phenotypes towards this causal fungus are not yet fully known. A reliable quantification of gene expression using quantitative real time PCR (qPCR) is fundamental ... -
Seasonal dynamics of carbonate chemistry, nutrients and CO2 uptake in a sub-Arctic fjord
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-08-17)Environmental change can have a significant impact on biogeochemical cycles at high latitudes and be particularly important in ecologically valuable fjord ecosystems. Seasonality in biogeochemical cycling in a sub-Arctic fjord of northern Norway (Kaldfjorden) was investigated from October 2016 to September 2018. Monthly changes in total inorganic carbon (C<sub>T</sub>), alkalinity (A<sub>T</sub>), ... -
Assessment of benefits and risks of probiotics in processed cereal-based baby foods Lactobacillus paracasei ssp. paracasei F19
(Research report; Forskningsrapport, 2011-06-23)The Norwegian Scientific Committee for Food Safety (VKM) has appointed an ad hoc-group of experts to answer a request from the Norwegian Food Safety Authority regarding benefit and risk assessment of Lactobacillus paracasei ssp. paracasei F19 (F19) in processed cereal-based baby foods intended for small children 1-3 years. This assessment is based on the literature provided by the notifier as well ... -
Risk assessment on welfare in turkeys. Opinion of the Panel of Animal Health and Welfare of the Norwegian Scientific Committee for Food Safety
(Research report, 2016-02-15)The Norwegian Food Safety Authority (NFSA) asked the Norwegian Scientific Committee for Food Safety (Vitenskapskomiteen for mattrygghet, VKM) for a risk assessment on turkey welfare. The VKM report will be used by NFSA in assessing the need for amending the existing regulations, competence requirements, and guidelines for surveillance and control related to keeping turkeys. Inspectors from NFSA ... -
Temperature does not influence functional response of amphipods consuming different trematode prey
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-08-26)Direct consumption on free-living cercariae stages of trematodes by non-host organisms interferes with trematode transmission and leads to reduced infections in the next suitable hosts. Consumer functional responses provide a useful tool to examine relationships between consumption rates and ecologically relevant prey densities, whilst also accounting for abiotic factors that likely influence ... -
The rise of a marine generalist predator and the fall of beta diversity
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-03-17)Determining the importance of physical and biological drivers in shaping biodiversity in diverse ecosystems remains a global challenge. Advancements have been made towards this end in large marine ecosystems with several studies suggesting environmental forcing as the primary driver. However, both empirical and theoretical studies point to additional drivers of changes in diversity involving trophic ... -
Planktivore vertical migration and shoaling under a subarctic light regime
(Journal article; Tidsskriftartikkel; Peer reviewed, 2009-03-20)Visually foraging planktivorous fish are prey of visual predators, and their foraging behaviour may be affected by light levels both in terms of gain and risk. The large seasonal change in day length throughout a subarctic summer at 69°N was used to show the influence of light on diel vertical migration (DVM) and shoaling patterns in a planktivorous fish assemblage consisting of two species (<i>Coregonus ... -
Spreading or Gathering? Can Traditional Knowledge be a Resource to Tackle Reindeer Diseases Associated with Climate Change?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-08-18)This paper inquires whether reindeer herders’ traditional knowledge (TK) provides a reservoir of precaution and adaptation possibilities that may be relevant to counteract climate change. As our core example, we used the milking of reindeer—which, in some areas, was practiced up until the 1950s–1960s—and the risk of getting foot rot disease (digital necrobacillosis; slubbo in North Sámi), caused by ... -
Demographic responses of Daphnia magna fed transgenic Bt-maize
(Journal article; Tidsskriftartikkel; Peer reviewed, 2009-10-27)The food/feed quality of a variety of genetically modified (GM) maize expressing Cry1Ab Bt-toxin was tested over the life-cycle of <i>Daphnia magna</i>, an arthropod commonly used as model organism in ecotoxicological studies. Demographic responses were compared between animals fed GM or unmodified (UM) near isogenic maize, with and without the addition of predator smell. Age-specific data on survival ... -
High Arctic ecosystem states: Conceptual models of vegetation change to guide long-term monitoring and research
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-18)Vegetation change has consequences for terrestrial ecosystem structure and functioning and may involve climate feedbacks. Hence, when monitoring ecosystem states and changes thereof, the vegetation is often a primary monitoring target. Here, we summarize current understanding of vegetation change in the High Arctic—the World’s most rapidly warming region—in the context of ecosystem monitoring. To ... -
Arctic Observations Identify Phytoplankton Community Composition as Driver of Carbon Flux Attenuation
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-24)The attenuation coefficient <i>b</i> is one of the most common ways to describe how strong the carbon flux is attenuated throughout the water column. Therefore, <i>b</i> is an essential input variable in many carbon flux and climate models. Marsay et al. (2015, <a href=https://doi.org/10.1073/pnas.1415311112>https://doi.org/10.1073/pnas.1415311112</a>) proposed that the median surface water temperature ... -
Interactions between winter and summer herbivory affect spatial and temporal plant nutrient dynamics in tundra grassland communities
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-04-27)In the long‐term, herbivores can alter nutrient dynamics in terrestrial ecosystems by changing the functional composition of plant communities. Here, we ask to what extent herbivores can affect plant‐community nutrient dynamics in the short‐term. We provide theoretical expectations for immediate effects of herbivores on tundra‐grassland plant‐community nutrient levels throughout a single growing ...