Recent Submissions

  • The influence of a submerged meadow on uptake and trophic transfer of legacy mercury from contaminated sediment in the food web in a brackish Norwegian fjord 

    Olsen, Marianne; Fjeld, Eirik; Lydersen, Espen (Journal article; Peer reviewed, 2019)
    There are contradicting results on the importance of legacy mercury (Hg) contaminated sediments to Hg fish tissue concentrations. Still, sediment remediation actions often aim at minimizing ecosystem exposure and human ...
  • Improved Environmental Status: 50 Years of Declining Fish Mercury Levels in Boreal and Subarctic Fennoscandia 

    Braaten, Hans Fredrik Veiteberg; Åkerblom, Staffan; Kahilainen, Kimmo Kalevi; Rask, Martti; Vuorenmaa, Jussi; Mannio, Jaakko; Malinen, Tommi; Lydersen, Espen; Poste, Amanda; Amundsen, Per-Arne; Kashulin, Nikolai; Kashulina, Tatiana; Terentjev, Petr; Christensen, Guttorm; de Wit, Heleen (Journal article; Peer reviewed, 2019)
    Temporally (1965–2015) and spatially (55°–70°N) extensive records of total mercury (Hg) in freshwater fish showed consistent declines in boreal and subarctic Fennoscandia. The database contains 54 560 fish entries (n: pike ...
  • Sex-biased dispersal in a northern ungulate population 

    Haanes, Hallvard; Røed, Knut H.; Rosef, Olav (Journal article; Peer reviewed, 2011)
    In most mammals dispersal is male-biased and in many polygynous ungulates female philopatry and matrilineal grouping involve small-scale genetic structure. We have through sex-related differences in microsatellite allele ...
  • Identification of salmon population bottlenecks from low flows in a hydro-regulated river 

    Adeva Bustos, Ana; Hedger, Richard David; Fjeldstad, Hans-Petter; Stickler, Morten; Alfredsen, Knut (Journal article; Peer reviewed, 2019)
    Flow regime alterations from hydropower regulation may impact fish populations. Impacts can be characterized using methods for mapping bottlenecks for different species life stages. Improving the understanding of such ...
  • Heritability of head size in a hunted large carnivore, the brown bear (Ursus arctos) 

    Rivrud, Inger Maren; Frank, Shane; Bischof, Richard; Mysterud, Atle; Steyaert, Sam; Hertel, Anne Gabriela; Hagen, Snorre; Eiken, Hans Geir; Swenson, Jon; Zedrosser, Andreas (Journal article; Peer reviewed, 2019)
    Wild animal populations experience selection pressures from both natural and anthropogenic sources. The availability of extensive pedigrees is increasing along with our ability to quantify the heritability and evolvability ...
  • Petrifilm TM som alternativt medium for dyrking av bakterier i vann 

    Rosef, Olav; Odland, Arvid; Bjerketvedt, Dag Kjartan (Journal article, 2002)
    Metoden NS-EN ISO 6222 er sammenlignet med Petrifilm for påvisning og telling av mikroorganismer i overflatevann (råvann) og i drikkevann (behandlet vann). De dyrkingstemperaturene som gjeldende drikkevannsforskrift angir ...
  • An In Situ Experimental Study of Effects on Submerged Vegetation After Activated Carbon Amendment of Legacy Contaminated Sediments 

    Olsen, Marianne; Moy, Frithjof E; Mjelde, Marit; Lydersen, Espen (Journal article; Peer reviewed, 2018)
    Activated carbon (AC) amendment has been shown to reduce bioavailability of hydrophobic contaminants in the bioactive layer of sediment. Unwanted secondary effects of AC amendment could be particularly undesirable for ...
  • Metabolic reprogramming involving glycolysis in the hibernating brown bear skeletal muscle 

    Chazarin, Blandine; Storey, Kenneth B.; Ziemianin, Anna; Chanon, Stéphanie; Plumel, M.; Chery, Isabelle; Durand, Christine; Evans, Alina; Arnemo, Jon Martin; Zedrosser, Andreas; Swenson, Jon; Gauquelin-Koch, Guillemette; Simon, Chantal; Blanche, Stephane; Lefai, Etienne; Bertile, Fabrice (Journal article; Peer reviewed, 2019)
    Background In mammals, the hibernating state is characterized by biochemical adjustments, which include metabolic rate depression and a shift in the primary fuel oxidized from carbohydrates to lipids. A number of studies ...
  • A human-induced landscape of fear influences foraging behavior of brown bears 

    Lodberg-Holm, Hanna Kavli; Gelink, Henriette Wathne; Hertel, Anne Gabriela; Swenson, Jon; Domevscik, Matej; Steyaert, Sam (Journal article; Peer reviewed, 2018)
    Animals adapt their foraging behavior to variations in food availability and predation risk. In Sweden, brown bears (Ursus arctos) depend on a nearly continuous intake of berries, especially bilberries (Vaccinium myrtillus) ...
  • Environmental factors influencing mercury speciation in Subarctic and Boreal lakes 

    Braaten, Hans Fredrik Veiteberg; de Wit, Heleen; Fjeld, Eirik; Rognerud, Sigurd; Lydersen, Espen; Larssen, Thorjørn (Journal article; Peer reviewed, 2014)
    Environmental drivers of total mercury (TotHg) concentrations, methylmercury (MeHg) concentrations, and MeHg fractions (a proxy for methylation potential, expressed as %MeHg) were assessed in a synoptic study of 51 lakes ...
  • First 10Be measurements at Trondheim 1 MV AMS 

    Seiler, Martin; Anjar, Johanna; Værnes, Einar; Nadeau, Marie-Josée; Scognamiglio, Grazia (Journal article; Peer reviewed, 2018)
    The performance of the Trondheim 1 MV AMS system for 10Be measurements has been investigated. While the initial acceptance tests were done using the 1 + 1+ charge state, we concluded that the 2 + 2+ charge state offers ...
  • The influence of permanently submerged macrophytes on sediment mercury distribution, mobility and methylation potential in a brackish Norwegian fjord 

    Olsen, Marianne; Schaanning, Morten; Braaten, Hans Fredrik Veiteberg; Eek, Espen; Moy, Frithjof Emil; Lydersen, Espen (Journal article; Peer reviewed, 2018)
    Macrophytes are shown to affect the microbial activity in different aqueous environments, with an altering of the sediment cycling of mercury (Hg) as a potential effect. Here, we investigated how a meadow with permanently ...
  • Performance of GPS units for deployment on semiaquatic animals 

    Justicia, Lia Schlippe; Rosell, Frank Narve; Mayer, Martin (Journal article; Peer reviewed, 2018)
    Global Positioning System (GPS) technology is widely used in wildlife research to study animal movement and habitat use. In order to evaluate the quality and reliability of GPS data, the factors influencing the performance ...
  • OSL dating of Weichselian ice-free periods at Skorgenes, Western Norway 

    Anjar, Johanna; Alexanderson, Helena; Larsen, Eiliv; Lyså, Astrid (Journal article; Peer reviewed, 2018)
    During recent years, many sites with sediments pre-dating the Last Glacial Maximum have been identified in formerly glaciated areas. As more and better dates are presented from these sites, the dynamic behaviour of the ...
  • Are trampling effects by wild tundra reindeer understudied? 

    Heggenes, Jan; Odland, Arvid; Bjerketvedt, Dag Kjartan (Journal article; Peer reviewed, 2018)
    Grazing and trampling by the wide-ranging wild tundra reindeer may have major top down landscape effects by causing vegetation changes. Grazing, as the collective effect of eating, trampling, defecation, and urination, has ...
  • Abrupt high-latitude climate events and decoupled seasonal trends during the Eemian 

    Salonen, J. Sakari; Helmens, Karin F.; Brendryen, Jo; Kuosmanen, Niina; Väliranta, Minna; Goring, Simon; Korpela, Mikko; Kylander, Malin; Philip, Annemarie; Plikk, Anna; Renssen, Hans; Luoto, Miska (Journal article; Peer reviewed, 2018)
    The Eemian (the Last Interglacial; ca. 129–116 thousand years ago) presents a testbed for assessing environmental responses and climate feedbacks under warmer-than-present boundary conditions. However, climate syntheses ...
  • Can concentrations of steroid hormones in brown bear hair reveal age class? 

    Cattet, Marc; Stenhouse, Gordon B.; Boulanger, John; Janz, David M.; Kapronczai, Luciene; Swenson, Jon; Zedrosser, Andreas (Journal article; Peer reviewed, 2018)
    Although combining genetic and endocrine data from non-invasively collected hair samples has potential to improve the conservation of threatened mammals, few studies have evaluated this opportunity. In this study, we ...
  • Repeated five-day administration of L-BMAA, microcystin-LR, or as mixture, in adult C57BL/6 mice - lack of adverse cognitive effects 

    Myhre, Oddvar; Eide, Dag Markus; Kleiven, Synne; Utkilen, Hans Christian; Hofer, Tim (Journal article; Peer reviewed, 2018)
    The cyanobacterial toxins β-methylamino-L-alanine (L-BMAA) and microcystin-LR (MC-LR; a potent liver toxin) are suspected to cause neurological disorders. Adult male C57BL/6JOlaHsd mice aged approximately 11 months were ...
  • Hunting regulation favors slow life histories in a large carnivore 

    Van de Walle, Joanie; Pigeon, Gabriel; Zedrosser, Andreas; Swenson, Jon; Pelletier, Fanie (Journal article; Peer reviewed, 2018)
    As an important extrinsic source of mortality, harvest should select for fast reproduction and accelerated life histories. However, if vulnerability to harvest depends upon female reproductive status, patterns of selectivity ...
  • Agricultural landscapes and the Loire River influence the genetic structure of the marbled newt in Western France 

    Costanzi, Jean-Marc; Pascal, Mege; Alexandre, Boissinot; Francis, Isselin-Nondedeu; Sandra, Guerin; Olivier, Lourdais; Audrey, Trochet; Quentin, Le Petitcorps; Agathe, Legrand; Francois, Varenne; Pierre, Grillet; Sophie, Morin-Pinaud; Damien, Picard (Journal article; Peer reviewed, 2018)
    Amphibians are particularly sensitive to landscape fragmentation. Potential barriers between breeding sites can negatively infuence the dispersal of individuals and increase genetic structure between populations. In this ...

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