Blar i forfatter "Christensen, Guttorm N."

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    • Elucidating the Behavior of Cyclic Volatile Methylsiloxanes in a Subarctic Freshwater Food Web: A Modeled and Measured Approach 

      Krogseth, Ingjerd S.; Undeman, Emma; Evenset, Anita; Christensen, Guttorm N.; Whelan, Mick J.; Breivik, Knut; Warner, Nicholas A. (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-10-05)
      Cyclic volatile methylsiloxanes (cVMS) are used in personal care products and emitted to aquatic environments through wastewater effluents, and their bioaccumulation potential is debated. Here, a new bentho-pelagic version of the ACC-HUMAN model was evaluated for polychlorinated biphenyls (PCBs) and applied to cVMS in combination with measurements to explore their bioaccumulation behavior in a ...

    • The impact of a Nickel-Copper smelter on concentrations of toxic elements in local wild food from the Norwegian, Finnish, and Russian border regions 

      Hansen, Martine Dalgaard; Nøst, Therese Haugdahl; Heimstad, Eldbjørg Sofie; Evenset, Anita; Dudarev, Alexey A.; Rautio, Arja; Myllynen, Päivi; Dushkina, Eugenia V.; Jagodic, Marta; Christensen, Guttorm N.; Anda, Erik Eik; Brustad, Magritt; Sandanger, Torkjel M (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-06-28)
      Toxic elements emitted from the Pechenganickel complex on the Kola Peninsula have caused concern about potential effects on local wild food in the border regions between Norway, Finland and Russia. The aim of this study was to assess Ni, Cu, Co, As, Pb, Cd, and Hg concentrations in local wild foods from these border regions. During 2013–2014, we collected samples of different berry, mushroom, ...

    • Methylmercury biomagnification in an Arctic pelagic food web 

      Ruus, Anders; Øverjordet, Ida Beathe; Braaten, Hans Fredrik Veiteberg; Evenset, Anita; Christensen, Guttorm N.; Heimstad, Eldbjørg Sofie; Gabrielsen, Geir W.; Borgå, Katrine (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-08-14)
      Mercury (Hg) is a toxic element that enters the biosphere from natural and anthropogenic sources, and emitted gaseous Hg enters the Arctic from lower latitudes by long-range transport. In aquatic systems, anoxic conditions favor the bacterial transformation of inorganic Hg to methylmercury (MeHg), which has a greater potential for bioaccumulation than inorganic Hg and is the most toxic form of Hg. ...

    • Recolonization and recovery of an Arctic benthic community subject to mine-tailings deposits 

      Trannum, Hilde C; Pedersen, Kristine B.; Renaud, Paul E; Christensen, Guttorm N.; Evenset, Anita (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-22)
      Deposition of large volumes of mine tailings takes place in several Norwegian fjords, but the impacts on marine ecosystems have received relatively little scientific attention. At a 40 + − year old tailing deposition area for a copper mine in the Arctic fjord Repparfjorden, we investigated both short-term colonization of mine tailingscontaminated sediments through a field experiment, and the present ...