• 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 2021 / Miljøgifter i kystområdene 2021 

      Schøyen, Merete; Grung, Merete; Lund, Espen; Hjermann, Dag Øystein; Ruus, Anders; Øxnevad, Sigurd; Beylich, Bjørnar; Jenssen, Marthe Torunn Solhaug; Tveiten, Lise Ann; Håvardstun, Jarle; Ribeiro, Anne Luise; Doyer, Isabel; Bæk, Kine (NIVA-rapport;7784-2022, Research report, 2022)
      The Norwegian environmental monitoring programme “Contaminants in coastal waters” (Miljøgifter i kystområdene - MILKYS) examines levels, trends, and effects of contaminants in biota. The 2021 investigation included analyses ...
    • 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 ...
    • Effect of pooled sampling in the MILFERSK program 

      Hjermann, Dag Øystein; Økelsrud, Asle; Jartun, Morten (NIVA-rapport;7925-2024, Research report, 2024)
      The MILFERSK monitoring program is studying the occurrence and biomagnification of contaminants in freshwater ecosystems, mainly Lake Mjøsa. For the last 10 years, individual samples of muscle and liver from brown trout ...
    • 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 ...
    • Elveovervåkingsprogrammet 2021. Klassifisering av økologisk og kjemisk tilstand i norske elver i tråd med vannforskriften 

      Kile, Maia Røst; Ranneklev, Sissel Brit; Persson, Jonas; Myrvold, Knut Marius; Hjermann, Dag Øystein (NIVA-rapport;7770-2022, Research report, 2022)
      Elveovervåkingsprogrammet er en videreføring av Elvetilførselsprogrammet som NIVA, NIBIO og NVE har vært ansvarlige for siden 2004. Målsetningen med undersøkelsen har vært å klassifisere økologisk tilstand i henhold til ...
    • 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 ...
    • ESPIAL - Data review and evaluation of historical data (WP1) 

      Ruus, Anders; Hjermann, Dag Øystein; Håvardstun, Jarle; Øxnevad, Sigurd; Macken, Ailbhe (NIVA-rapport;7775-2022, Research report, 2022)
      The present report details the outcome of work package 1 of ESPIAL, with the aim of compiling the historical data from previous surveys at the aluminium sites in a common database and further to analyse the data. A graphical ...
    • 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. ...
    • Kunnskapsoppsummering om aktiviteter som forstyrrer karbonlagre i havet 

      Hjermann, Dag Øystein; Rudjord, Zofia Czyczula; Borgersen, Gunhild; Gundersen, Hege; Bhakta, Debhasish; Hancke, Kasper (NIVA-rapport;7828-2023, Research report, 2023)
      Marine karbonlagre har en betydelig rolle i karbonkretsløpet, både som lager for karbon og for kontinuerlig opptak av karbon. Rapporten fokuserer på fysisk forstyrrelse/ødeleggelse av karbonlagre, og spesielt på data og ...