• Additive Models Reveal Sources of Metals and Organic Pollutants in Norwegian Marine Sediments 

      Everaert, Gert; Ruus, Anders; Hjermann, Dag Øystein; Borgå, Katrine; Green, Norman Whitaker; Boitsov, Stepan; Jensen, Henning; Poste, Amanda (Journal article; Peer reviewed, 2017)
      We characterized spatial patterns of surface sediment concentrations of seven polychlorinated biphenyls (PCBs), seven polycyclic aromatic hydrocarbons (PAHs), three chlorinated pesticides, and five metals in Norwegian ...
    • Age-structure, harvesting and climate effects on population growth of Arcto-boreal fish stocks 

      Durant, Joel Marcel; Hjermann, Dag Øystein (Journal article; Peer reviewed, 2017)
      We used a comparative approach investigating commercially fished species with contrasting life histories and trophic positions in an Arcto-boreal system, the Barents Sea. Our objective was to address the ecological ...
    • Comparison of caged and native blue mussels (Mytilus edulis spp.) for environmental monitoring of PAH, PCB and trace metals 

      Schøyen, Merete; Allan, Ian; Ruus, Anders; Håvardstun, Jarle; Hjermann, Dag Øystein; Beyer, Jonny (Journal article; Peer reviewed, 2017)
      Contaminant bioaccumulation was studied in blue mussels (Mytilus edulis spp.) using the harbor waters of Kristiansand (Norway) as a case study. A suite of chemical contaminants (trace metals, PAHs and PCBs) was analyzed ...
    • Contaminants in coastal waters of Norway 2013 

      Green, Norman Whitaker; Schøyen, Merete; Øxnevad, Sigurd; Ruus, Anders; Allan, Ian; Hjermann, Dag Øystein; Høgåsen, Tore; Beylich, Bjørnar; Håvardstun, Jarle; Rogne, Åse K Gudmundson; Tveiten, Lise Ann (NIVA-rapport;6728, Research report, 2014)
      This programme examines the levels, trends and effects of contaminants in biota along the coast of Norway. The 2013-investigation included analyses of 120 different contaminants or biological effect parameters in five types ...
    • Contaminants in coastal waters of Norway 2014 

      Green, Norman Whitaker; Schøyen, Merete; Øxnevad, Sigurd; Ruus, Anders; Allan, Ian; Hjermann, Dag Øystein; Høgåsen, Tore; Beylich, Bjørnar; Håvardstun, Jarle; Lund, Espen; Tveiten, Lise Ann; Bæk, Kine (NIVA-rapport;6917, Research report, 2015)
      This programme examines the levels, trends and effects of contaminants in biota along the coast of Norway. The 2014-investigation included analyses of 136 different contaminants or biological effect parameters in five types ...
    • Contaminants in coastal waters of Norway 2016 

      Green, Norman Whitaker; Schøyen, Merete; Øxnevad, Sigurd; Ruus, Anders; Hjermann, Dag Øystein; Severinsen, Gunnar; Høgåsen, Tore; Beylich, Bjørnar; Håvardstun, Jarle; Lund, Espen; Tveiten, Lise Ann; Bæk, Kine (NIVA-rapport;7579, Research report, 2021)
      This programme examines the levels, trends and effects of contaminants in biota along the coast of Norway. The 2016- investigation included analyses of 104 different contaminants or biological effect parameters in five ...
    • Contaminants in coastal waters of Norway 2017 

      Green, Norman Whitaker; Schøyen, Merete; Hjermann, Dag Øystein; Øxnevad, Sigurd; Ruus, Anders; Lusher, Amy; Beylich, Bjørnar; Lund, Espen; Tveiten, Lise Ann; Håvardstun, Jarle; Jenssen, Marthe Torunn Solhaug; Ribeiro, Anne Luise; Bæk, Kine (NIVA-rapport;7580, Research report, 2021)
      This programme examines the levels, trends and effects of contaminants in biota along the coast of Norway. The 2017-investigation included analyses of 93 different contaminants or biological effect parameters in five species ...
    • Contaminants in coastal waters of Norway 2019. 

      Green, Norman Whitaker; Schøyen, Merete; Hjermann, Dag Øystein; Øxnevad, Sigurd; Ruus, Anders; Grung, Merete; Beylich, Bjørnar; Lund, Espen; Tveiten, Lise Ann; Jenssen, Marthe Torunn Solhaug; Håvardstun, Jarle; Ribeiro, Anne Luise; Doyer, Isabel; Bæk, Kine (NIVA-rapport;7741-2022, Research report, 2022)
      This monitoring programme examines levels, trends and effects of contaminants in biota along the coast of Norway. The 2019- investigation included analyses of more than 176 different contaminants or biological effect ...
    • Contaminants in coastal waters of Norway 2020 

      Schøyen, Merete; Lund, Espen; Hjermann, Dag Øystein; Ruus, Anders; Beylich, Bjørnar; Jenssen, Marthe Torunn Solhaug; Tveiten, Lise Ann; Håvardstun, Jarle; Ribeiro, Anne Luise; Doyer, Isabel; Bæk, Kine; Grung, Merete; Øxnevad, Sigurd (NIVA-rapport;7686-2021, Research report, 2021)
      The monitoring programme “Contaminants in coastal waters of Norway” (Miljøgifter i norske kystområder - MILKYS) examines levels, trends and effects of contaminants in biota. The 2020-investigation included analyses of more ...
    • Dataanalyse av kontinuerlige målinger utenfor The Quartz Corp på Drag i Tysfjord – rapport av målinger gjort i 2014 

      Hjermann, Dag Øystein; Staalstrøm, Andre; Hagen, Anders Gjørwad; Skogan, Odd Arne Segtnan (NIVA-rapport;6878, Research report, 2015)
      Siden mars 2012 har en målerigg nær utslippsledningene til The QUARZ Corp på Drag i Tysfjord tatt kontinuerlige målinger av pH, turbiditet og oseanografiske parametere på 10 og 20 meters dyp. Denne rapporten er en presentasjon ...
    • Do benthic algae provide important information over and above that provided by macrophytes and phytoplankton in lake status assessment? – Results from a case study in Norway 

      Schneider, Susanne Claudia; Hjermann, Dag Øystein; Edvardsen, Hanne (Journal article; Peer reviewed, 2019)
      To test if phytobenthic algae provide additional important information to macrophytes and phytoplankton for lake monitoring, we sampled two large lakes in Norway. In each lake, we analyzed water chemistry and phytoplankton ...
    • Effects of an aquaculture pesticide (diflubenzuron) on non-target shrimp populations: Extrapolation from laboratory experiments to the risk of population decline 

      Moe, S. Jannicke; Hjermann, Dag Øystein; Ravagnan, Elisa; Bechmann, Renée Katrin (Journal article; Peer reviewed, 2019)
      Marine aquaculture production has lately experienced high economic growth, but also concerns related to production and environmental contamination. For the Atlantic salmon aquaculture industry, the ectoparasitic crustacean ...
    • Effects of climate and eutrophication on the diversity of hard bottom communities on the Skagerrak coast 1990-2010 

      Norderhaug, Kjell Magnus; Gundersen, Hege; Pedersen, Are; Moy, Frithjof Emil; Green, Norman Whitaker; Walday, Mats Gunnar; Gitmark, Janne Kim; Ledang, Anna Birgitta; Bjerkeng, Birger; Hjermann, Dag Øystein; Trannum, Hilde Cecilie (Journal article; Peer reviewed, 2015)
      Eutrophication is one of the most serious environmental problems in the Skagerrak, and climate change may increase eutrophication in the future. This study focused on the effects of eutrophication and climate, and the ...
    • Environmental effects of offshore produced water discharges: A review focused on the Norwegian continental shelf 

      Beyer, Jonny; Goksøyr, Anders; Hjermann, Dag Øystein; Klungsøyr, Jarle (Peer reviewed; Journal article, 2020)
      Produced water (PW), a large byproduct of offshore oil and gas extraction, is reinjected to formations or discharged to the sea after treatment. The discharges contain dispersed crude oil, polycyclic aromatic hydrocarbons ...
    • Geostatistiske analyser av miljøgifter i mudringsområde Borg 1 

      Hjermann, Dag Øystein (NIVA-Rapport;7057, Research report, 2016)
      I forbindelse med planlagt mudring av området Borg 1 (innseilingen til Borg Havn, Fredrikstad kommune) har Rambøll AS foretatt kjemisk analyse av 227 sedimentprøver hentet fra 96 overflateprøver/kjerner i mudringsområdet. ...
    • Larvae drift simulations of the Pacific oyster in Skagerrak – influence of climate change on larvae development, survival and dispersal 

      Rinde, Eli; Hjermann, Dag Øystein; Staalstrøm, Andre (NIVA-rapport;7016, Research report, 2016)
      We have investigated the extent to which warmer climate in recent years has led to greater opportunities for successful spreading of Pacific oyster (Crassostrea gigas) larvae from Danish and Swedish coastal areas to Norway, ...
    • Mercury concentration trend as a possible result of changes in cod population demography 

      Ruus, Anders; Hjermann, Dag Øystein; Beylich, Bjørnar; Schøyen, Merete; Øxnevad, Sigurd; Green, Norman Whitaker (Journal article; Peer reviewed, 2017)
      Mercury (Hg) in Atlantic cod (Gadus morhua) is one of many parameters that are monitored through OSPAR's Joint Assessment and Monitoring Programme. Time series for cod in the Inner Oslofjord (Norway) go back to 1984. Until ...
    • Miljøundersøkelser i Tysfjorden for The Quartz Corp, Drag 

      Hjermann, Dag Øystein; Borgersen, Gunhild; Georgantzopoulou, Anastasia; Gitmark, Janne Kim; Brkljacic, Marijana Stenrud (NIVA-rapport;7751-2022, Research report, 2022)
      NIVA har undersøkt biologiske og kjemiske kvalitetselementer i Tysfjord ved The Quartz Corp sitt anlegg i Drag (Hamarøy/Hábmera kommune, Nordland fylke), samt undersøkt giftigheten av produktet Duomeen CD (bestående av ...
    • Nitrogen in surface waters: time trends and geographical patterns explained by deposition levels and catchment characteristics 

      Austnes, Kari; Hjermann, Dag Øystein; Sample, James Edward; Wright, Richard Frederic; Kaste, Øyvind; de Wit, Heleen (NIVA-rapport;7728-2022, Research report, 2022)
      The report presents a statistical analysis of controls (deposition, land cover, climate) on spatial variability and long-term trends (1992-2016) in surface water concentrations of nitrate (NO3) and carbon to nitrogen (C/N) ...
    • The Norwegian river monitoring programme 2019 – water quality status and trends 

      Braaten, Hans Fredrik Veiteberg; Gundersen, Cathrine Brecke; Kaste, Øyvind; Sample, James Edward; Hjermann, Dag Øystein; Norling, Magnus Dahler; Guerrero, Jose-Luis; Allan, Ian; Nizzetto, Luca (NIVA-rapport;7564, Research report, 2020)
      In the Norwegian River Monitoring Programme (in Norwegian: Elveovervåkingsprogrammet) 20 rivers along the Norwegian coastline are monitored for chemical and hydrological parameters. It is a continuation of river monitoring ...