• A snap shot of the short-term response of crustaceans to macrophyte detritus in the deep Oslofjord 

      Ramirez-Llodra, Eva; Rinde, Eli; Gundersen, Hege; Christie, Hartvig; Fagerli, Camilla With; Fredriksen, Stein; Gitmark, Janne Kim; Norling, Karl; Walday, Mats Gunnar; Norderhaug, Kjell Magnus (Journal article; Peer reviewed, 2016)
      A test deployment of a time-lapse camera lander in the deep Oslofjord (431 m) was used to obtain initial information on the response of benthic fauna to macroalgal debris. Three macroalgal species were used on the lander ...
    • Arctic kelp forests: Diversity, resilience and future 

      Filbee-Dexter, Karen; Wernberg, Thomas; Fredriksen, Stein; Norderhaug, Kjell Magnus; Pedersen, Morten Foldager (Journal article; Peer reviewed, 2019)
      The Arctic is one of the most rapidly changing places on Earth and it is a sentinel region for understanding the range and magnitude of planetary changes, and their impacts on ecosystems. However, our understanding of ...
    • Can multitrophic interactions and ocean warming influence large-scale kelp recovery? 

      Christie, Hartvig C; Gundersen, Hege; Rinde, Eli; Filbee-Dexter, Karen; Norderhaug, Kjell Magnus; Pedersen, Torstein; Bekkby, Trine; Gitmark, Janne Kim; Fagerli, Camilla With (Journal article; Peer reviewed, 2019)
      Ongoing changes along the northeastern Atlantic coastline provide an opportunity to explore the influence of climate change and multitrophic interactions on the recovery of kelp. Here, vast areas of sea urchin‐dominated ...
    • Can sea urchin grazing of kelp forests in the arctic make rocky shore systems more vulnerable to oil spills? 

      Christie, Hartvig C; Bekkby, Trine; Norderhaug, Kjell Magnus; Beyer, Jonny; Jørgensen, Nina Mari (Journal article; Peer reviewed, 2019)
      In Arctic Norway, the risk of major marine oil spills associated with increasing offshore drilling, land terminal, and maritime transport activities is a cause for concern. Intertidal and subtidal kelp and seaweed communities ...
    • Carbon export is facilitated by sea urchins transforming kelp detritus 

      Filbee-Dexter, Karen; Pedersen, Morten Foldager; Fredriksen, Stein; Norderhaug, Kjell Magnus; Rinde, Eli; Kristiansen, Trond; Albretsen, Jon; Wernberg, Thomas (Peer reviewed; Journal article, 2019)
      With the increasing imperative for societies to act to curb climate change by increasing carbon stores and sinks, it has become critical to understand how organic carbon is produced, released, transformed, transported, and ...
    • Detrital carbon production and export in high latitude kelp forests 

      Pedersen, Morten Foldager; Filbee-Dexter, Karen; Norderhaug, Kjell Magnus; Fredriksen, Stein; Frisk, Nicolai Lond; Fagerli, Camilla With; Wernberg, Thomas (Peer reviewed; Journal article, 2020)
      The production and fate of seaweed detritus is a major unknown in the global C-budget. Knowing the quantity of detritus produced, the form it takes (size) and its timing of delivery are key to understanding its role as a ...
    • 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 ...
    • Importance of wave and current exposure to fauna communities in Laminaria hyperborea kelp forest 

      Norderhaug, Kjell Magnus; Christie, Hartvig C; Rinde, Eli; Gundersen, Hege; Bekkby, Trine (Journal article; Peer reviewed, 2014)
      Hydrodynamic forces from waves and currents may have strong but different impacts on benthic diversity. In order to study the relative importance of current and wave exposure to the diversity of macrofauna associated with ...
    • Lack of sea urchin settlement may explain kelp forest recovery in overgrazed areas in Norway 

      Fagerli, Camilla With; Norderhaug, Kjell Magnus; Christie, Hartvig C (Journal article; Peer reviewed, 2013)
      In this study, we investigated whether failure of sea urchin recruitment can explain an ongoing phase shift from overgrazed, barren grounds to kelp forests along the coast of mid- Norway. Settlement of sea urchins on ...
    • Langtidsovervåking av miljøkvaliteten i kystområdene av Norge 

      Norderhaug, Kjell Magnus; Ledang, Anna Birgitta; Trannum, Hilde Cecilie; Bjerkeng, Birger; Aure, Jan; Falkenhaug, Tone; Folkestad, Are; Johnsen, Torbjørn; Lømsland, Evy; Omli, Lena; Rygg, Brage; Sørensen, Kai (NIVA-rapport;6134, Research report, 2011)
      Rapporten beskriver miljøkvaliteten i kystområdene av Sør-Norge i 2010, med spesiell fokus på tilstand og utvikling i næringssalttilførsler, vannkvalitet og det biologiske mangfoldet i plankton-, bløt- og hardbunns­samfunn. ...
    • Length, strength and water flow: relative importance of wave and current exposure on morphology in kelp Laminaria hyperborea 

      Bekkby, Trine; Rinde, Eli; Gundersen, Hege; Norderhaug, Kjell Magnus; Gitmark, Janne K.; Christie, Hartvig (Journal article; Peer reviewed, 2014)
      Water flow is a strong determinant of kelp growth, but it is also a stress factor causing breakage and dislodgement. As wave exposure and currents differ with respect to flow pattern, the 2 forces are expected to affect ...
    • Miljøundersøkelser rundt vraket av MS Server 

      Norderhaug, Kjell Magnus; Bakke, Torgeir Heggelund; Berge, John Arthur; Fagerli, Camilla With; Tveiten, Lise Ann; Gitmark, Janne Kim; Walday, Mats Gunnar (NIVA-rapport;6916, Research report, 2015)
      NIVA har gjennomført miljøundersøkelser rundt vraket av MS Server. Resultatene var entydige og hovedkonklusjonen fra undersøkelsene er at vraket av MS Server ikke har negativ påvirkning på miljøet med hensyn på tre viktige ...
    • Movement of pulsed resource subsidies from kelp forests to deep fjords 

      Filbee-Dexter, Karen; Wernberg, Thomas; Norderhaug, Kjell Magnus; Ramirez-Llodra, Eva; Pedersen, Morten Foldager (Journal article; Peer reviewed, 2018)
      Resource subsidies in the form of allochthonous primary production drive secondary production in many ecosystems, often sustaining diversity and overall productivity. Despite their importance in structuring marine communities, ...
    • New microsatellite loci for the green sea urchin Strongylocentrotus droebachiensis using universal M13 labelled markers 

      Angles d'Auriac, Marc; Hobæk, Anders; Christie, Hartvig C; Gundersen, Hege; Fagerli, Camilla With; Haugstetter, Johannes; Norderhaug, Kjell Magnus (Journal article; Peer reviewed, 2014)
    • Predators of the destructive sea urchin grazer Strongylocentrotus droebachiensis on the Norwegian coast 

      Fagerli, Camilla With; Norderhaug, Kjell Magnus; Christie, Hartvig C; Pedersen, Morten Foldager; Fredriksen, Stein (Journal article; Peer reviewed, 2014)
      In central Norway, populations of the green sea urchin Strongylocentrotus droe-bachiensis are collapsing, but the factors controlling its population density have not yet been elucidated. Through field sampling, we identified ...
    • Red sea urchins (Echinus esculentus) and water flow influence epiphytic macroalgae density 

      Bekkby, Trine; Angeltveit, Gro; Gundersen, Hege; Tveiten, Lise Ann; Norderhaug, Kjell Magnus (Journal article; Peer reviewed, 2015)
      The importance of forests of the kelp Laminaria hyperborea along the Norwegian coast is related to the three dimensional structure that they create together with the associated macroalgae. Today, kelp forests have recovered ...
    • Soft bottom benthos and responses to climate variation and eutrophication in Skagerrak 

      Trannum, Hilde Cecilie; Gundersen, Hege; Oug, Eivind; Rygg, Brage; Norderhaug, Kjell Magnus (Journal article; Peer reviewed, 2018)
      Skagerrak has been subject to several anthropogenic influences over the past decades, with climate change and eutrophication being considered as the most serious and large-scale disturbance factors. The present study reports ...
    • Tallknusing av sukkertaredata 

      Gundersen, Hege; Norderhaug, Kjell Magnus; Christie, Hartvig C; Moy, Frithjof Emil; Hjermann, Dag Øystein; Vedal, Jens; Ledang, Anna Birgitta; Gitmark, Janne Kim; Walday, Mats (NIVA-rapport;6737, Research report, 2014)
      Norsk institutt for vannforskning (NIVA) og Havforskningsinstituttet (HI) har gjennomført prosjektet «Tallknusing av sukkertare-data», på oppdrag fra Miljødirektoratet. Gjennom prosjektet har tilgjengelige data som kan ...
    • The influence of physical factors on kelp and sea urchin distribution in previously and still grazed areas in the NE Atlantic 

      Rinde, Eli; Christie, Hartvig; Fagerli, Camilla W.; Bekkby, Trine; Gundersen, Hege; Norderhaug, Kjell Magnus; Hjermann, Dag Ø. (Journal article; Peer reviewed, 2014)
      The spatial distribution of kelp (Laminaria hyperborea) and sea urchins (Strongylocentrotus droebachiensis) in the NE Atlantic are highly related to physical factors and to temporal changes in temperature. On a large scale, ...