• Achieving Reliable Estimates of the Spatial Distribution of Kelp Biomass 

      van Son, Thijs Christiaan; Nikolioudakis, Nikolaos; Steen, Henning; Albretsen, Jon; Furevik, Birgitte Rugaard; Elvenes, Sigrid; Moy, Frithjof; Norderhaug, Kjell Magnus (Peer reviewed; Journal article, 2020)
      Kelp forests are highly productive systems that are important ecologically and commercially as well as in a blue carbon perspective. Given their importance, there is an urgent need to achieve reliable estimates of the ...
    • Biomassemodell for stortare - Ressursmodell for fremtidens forvaltning 

      Norderhaug, Kjell Magnus; van Son, Thijs Christiaan; Nikolioudakis, Nikolaos; Thormar, Jonas; Moy, Frithjof Emil; Knutsen, Jan Atle; Elvenes, Sigrid; Steen, Henning (Rapport fra havforskningen;2020 - 7, Research report, 2020)
      En romlig biomassemodell for stortare er utviklet i et pilotområde med gode data for bunn-, dyp- og miljøforhold og med høy oppløsning. Modellen predikerer en total stortarebiomasse på 457 000 tonn innenfor området. ...
    • 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 (Peer reviewed; Journal article, 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 ...
    • Depletion of coastal predatory fish sub-stocks coincided with the largest sea urchin grazing event observed in the NE Atlantic 

      Norderhaug, Kjell Magnus; Nedreaas, Kjell Harald; Huserbråten, Mats; Moland, Even (Peer reviewed; Journal article, 2020)
      In this contribution, we propose fishery driven predator release as the cause for the largest grazing event ever observed in the NE Atlantic. Based on the evolving appreciation of limits to population connectivity, published ...
    • 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 ...
    • HAMOD - HArd bottom MODeling :: GIS-modeling of hard bottom species distributions 

      Isæus, Martin; Bekkby, Trine; Kroglund, Tone; Moy, Frithjof E.; Norderhaug, Kjell Magnus; Pedersen, Are; Rinde, Eli (ICES CM Documents;2005/R:34, Working paper, 2005)
    • Kelp-carbon uptake by Arctic deep-sea food webs plays a noticeable role in maintaining ecosystem structural and functional traits 

      Vilas, Daniel; Coll, Marta; Pedersen, Torstein; Corrales, Xavier; Filbee-Dexter, Karen; Pedersen, Morten Foldager; Norderhaug, Kjell Magnus; Fredriksen, Stein; Wernberg, Thomas; Ramirez-Llodra, Eva (Peer reviewed; Journal article, 2020)
      The flow of non-living carbon (detritus) is considered an important process because it connects ecosystems and fuels benthic communities. In Norwegian kelp forests, 90% of the kelp production is exported to adjacent ...
    • Krafttak for kysttorsken - Kunnskap for stedstilpasset gjenoppbygging av bestander, naturtyper og økosystem i Færder- og Ytre Hvaler nasjonalparker 

      Moland, Even; Synnes, Ann-Elin; Naustvoll, Lars Johan; Freitas, Carla; Norderhaug, Kjell Magnus; Thormar, Jonas; Biuw, Martin; Jorde, Per Erik; Knutsen, Halvor; Dahle, Geir; Jelmert, Anders; Bosgraaf, Sebastian; Olsen, Esben Moland; Deininger, Anne; Haga, Atle (Rapport fra havforskningen;2021 - 2, Research report, 2021)
      Ytre Oslofjord har en unik kystnatur av svært stor verdi for både fastboende og tilreisende. Færder- og Ytre Hvaler nasjonalparker ligger side om side ytterst i fjorden, og skal sikre naturverdiene for kommende generasjoner. ...
    • Large-scale salmon farming in Norway impacts the epiphytic community of Laminaria hyperborea 

      Haugland, Barbro Taraldset; Armitage, Caroline S.; Kutti, Tina; Husa, Vivian; Skogen, Morten D.; Bekkby, Trine; Carvajalino-Fernandez, Marcos Antonio; Bannister, Raymond J; White, Camille Anna; Norderhaug, Kjell Magnus; Fredriksen, Stein (Peer reviewed; Journal article, 2021)
      Large-scale finfish farms are increasingly located in dispersive hard-bottom environments where Laminaria hyperborea forests dominate; however, the interactions between farm effluents and kelp forests are poorly understood. ...
    • Miljøpåvirkning fra dyrking av makroalger — Risikovurdering for norske farvann 

      Norderhaug, Kjell Magnus; Hansen, Pia Kupka; Fredriksen, Stein; Grøsvik, Bjørn Einar; Naustvoll, Lars Johan; Steen, Henning; Moy, Frithjof Emil (Rapport fra havforskningen;2021 - 24, Research report, 2021)
      Det er økende interesse for makroalgedyrking, og miljøforholdene langs norskekysten er godt egnet for denne type akvakultivering. Denne rapporten beskriver et faggrunnlag for forvaltning av tillatelser for makroalgekultivering ...
    • Mot en ny havnæring for tare? : Muligheter og utfordringer for dyrking av alger i Norge 

      Norderhaug, Kjell Magnus; Skjermo, Jorunn; Kolstad, Kari; Broch, Ole Jacob; Ergon, Åshild; Handå, Aleksander; Horn, Svein Jarle; Lock, Erik-Jan; Øverland, Margareth (Fisken og havet;2020 - 5, Research report, 2020)
      Behovet for bærekraftig produksjon av mat fra havet har aktualisert dyrking av tang og tare. Selv om potensialet for dyrking er stort i Norge er produksjonen på prøvestadiet på grunn av utfordringer knyttet til marked, ...
    • 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, ...
    • Sharing the neighbourhood: assessing the impact of kelp harvest on foraging behaviour of the European shag 

      Christensen-Dalsgaard, Signe; Mattisson, Jenny; Norderhaug, Kjell Magnus; Lorentsen, Svein Håkon (Peer reviewed; Journal article, 2020)
      Coastal kelp forest ecosystems create dynamic and productive habitats, supporting a wide range of epiphytic flora, invertebrates, fish and seabirds. Worldwide, kelp is harvested commercially, affecting kelp-associated ...
    • 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 (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 ...
    • Tareundersøkelser i Nordland i 2017 

      Steen, Henning; Norderhaug, Kjell Magnus; Moy, Frithjof Emil (Rapport fra havforskningen;9-2018, Research report, 2018)
      Havforskningsinstituttet har i perioden 2013-2017 gjennomført undersøkelser i forbindelse med prøvehøsting av stortare (Laminaria hyperborea) sør i Nordland. I forkant av prøvehøstingen i 2017 ble tarevegetasjonen undersøkt ...
    • Tareundersøkelser i Nordland i 2018 

      Steen, Henning; Norderhaug, Kjell Magnus; Moy, Frithjof Emil (Rapport fra havforskningen;44-2018, Research report, 2018)