• 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 ...
    • Aktiv forvaltning av marine verdier i kystsonen 

      Bodvin, Torjan; Kleiven, Alf Ring; Espeland, Sigurd Heiberg; Steen, Henning; Moy, Frithjof E. (Årsrapport;2012, Research report, 2012-12-14)
      The report gives an overview of activities, methods and preliminary results for the two municipalities involved, Tvedestrand and Lindesnes. The Ministry for Fisheries and Coastal affairs proclaimed 20.06.2012 the establishment ...
    • Alien species in Norway: results from quantitative ecological impact assessments 

      Sandvik, Hanno; Hilmo, Olga; Henriksen, Snorre; Elven, Reidar; Åsen, Per Arvid; Hegre, Hanne; Pedersen, Oddvar; Pedersen, Per Anker; Solstad, Heidi; Vandvik, Vigdis; Westergaard, Kristine Bakke; Ødegaard, Frode; Åström, Sandra Charlotte Helene; Elven, Hallvard; Endrestøl, Anders; Gammelmo, Øivind; Hatteland, Bjørn Arild; Solheim, Halvor; Nordén, Björn; Sundheim, Leif; Talgø, Venche; Falkenhaug, Tone; Gulliksen, Bjørn; Jelmert, Anders; Oug, Eivind; Sundet, Jan Henry; Forsgren, Elisabet; Finstad, Anders Gravbrøt; Hesthagen, Trygve H.; Nedreaas, Kjell Harald; Wienerroither, Rupert; Husa, Vivian; Fredriksen, Stein; Sjøtun, Kjersti; Steen, Henning; Hansen, Haakon; Hamnes, Inger Sofie; Karlsbakk, Egil; Magnusson, Christer; Ytrehus, Bjørnar; Pedersen, Hans Christian; Swenson, Jon; Syvertsen, Per Ole; Stokke, Bård Gunnar; Gjershaug, Jan Ove; Dolmen, Dag; Kjærstad, Gaute; Johnsen, Stein Ivar; Jensen, Thomas Correll; Hassel, Kristian; Gederaas, Lisbeth (Journal article, 2020)
      1. Due to globalisation, trade and transport, the spread of alien species is increasing dramatically. Some alien species become ecologically harmful by threatening native biota. This can lead to irreversible changes in ...
    • Biologiske verdier i sjø : marin kartlegging av kystnære fiskeressurser, vegetasjonsforhold og naturtyper i Vest-Agder fylke 

      Bodvin, Torjan; Olsen, Torstein; Espeland, Sigurd Heiberg; Steen, Henning (Research report, 2010-12)
    • 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. ...
    • Effekter av tarehøsting på fisk og skalldyr i Vikna, Nord-Trøndelag 2013 

      Bodvin, Torjan; Steen, Henning; Moy, Frithjof (Rapport fra Havforskningen;Nr. 38-2014, Working paper, 2014-12-22)
      The Institute of Marine Research studied effects of kelp (Laminaria hyperborea) harvesting on near shore fish and crab abundance in Vikna (Nord-Trøndelag) in June (before) and August (after) 2013. A similar follow up ...
    • Effekter av tarehøsting på fisk og skalldyr Nord-Trøndelag 2012 

      Steen, Henning; Bodvin, Torjan; Moy, Frithjof (Fisken og havet;4-2013, Research report, 2013-04-16)
      The Institute of Marine Research studied effects of kelp (Laminaria hyperborea) harvesting on nearshore fish and crab abundance in Nord-Trøndelag in August 2012. Recordings were made using fixed underwater camera systems ...
    • Effekter av tarehøsting på fisk og skalldyr, Flatanger 2014 

      Bodvin, Torjan; Steen, Henning; Hansen, Hege Øverbø; Sannæs, Hanne; Bosgraaf, Sebastian; Moy, Frithjof (Rapport fra Havforskningen;Nr. 2 - 2015, Working paper, 2014-12-30)
      The Institute of Marine Research studied effects of kelp (Laminaria hyperborea) harvesting on near shore fish and crab abundance in Flatanger, Nord-Trøndelag in August 2014. Recordings were made using fixed underwater ...
    • Green gravel: a novel restoration tool to combat kelp forests decline. 

      Fredriksen, Stein; Filbee-Dekster, Karen; Norderhaug, K.M.; Steen, Henning; Bodvin, Torjan; Coleman, M.A; Moy, Fritjjof; Wernberg, Thomas (Peer reviewed; Journal article, 2020)
      Kelp forests are in decline globally and large-scale intervention could be required to halt the loss of these valuable ecosystems. To date kelp forest restoration has had limited success and been expensive and unable to ...
    • Historical changes in macroalgal communities in Hardangerfjord (Norway) 

      Husa, Vivian; Steen, Henning; Sjøtun, Kjersti (Journal article; Peer reviewed, 2013-10-15)
      Hardangerfjord is the second largest fjord in Norway and is situated on the southwest coast. During the last century the fjord has been influenced by a variety of anthropogenous activities such as industry, hydro-electrical ...
    • Historical changes in macroalgal communities in Hardangerfjord (Norway) 

      Husa, Vivian; Steen, Henning; Sjøtun, Kjersti (Peer reviewed; Journal article, 2014)
    • Historical changes in macroalgal communities in Hardangerfjorden 

      Husa, Vivian; Steen, Henning; Sjøtun, Kjersti (Conference object, 2012)
    • Japansk rødalge i spredning: Gracilaria vermiculophylla 

      Rueness, Jan; Steen, Henning (Havforskningsnytt, Working paper, 2004)
    • Lea go vejolaš stáráid fas šaddadit? 

      Sunnset, Beate Hoddevik; Strand, Hans Kristian; Moy, Frithjof E.; Steen, Henning; Christie, Hartvig (Havforskningsnytt;Nr. 4 - 2010, Working paper, 2010)
      Poršáŋggus Finnmárkkus leat lihkostuvvan eret kálket gáranasruittuid, go geahččaladdanbáikkiin leat stárát fas šaddagoahtán. Guoličivggat orrot bures loaktimin ođđa stáráid gaskkas, ja dalle lea doaivva ahte stárráivuođa ...
    • Marine naturverdier i Telemark – status, trusler og muligheter. Innspill til kystsoneplan for Telemark. 

      Rinde, Eli; Olsen, Marianne; Steen, Henning; Dahl, Einar; Espeland, Sigurd Heiberg; Albretsen, Jon (NIVA-rapport, Research report, 2018)
      Denne rapporten er skrevet på oppdrag for Telemark fylkeskommune. Rapporten gir en kunnskapsstatus over forekomst og utbredelse av marine naturverdier, deres tilstand og hvilke kjente trusler disse er utsatt for med hensyn ...
    • Marinøkologiske ringvirkninger av vindmølleparker til havs 

      Steen, Henning; Nilssen, Kjell Tormod; Agnalt, Ann-Lisbeth; Alvsvåg, John; Asplin, Lars; Jelmert, Anders; Dahl, Einar; Dalen, John (Fisken og havet, Research report, 2008)
      There is an increasing need for energy. Considerable efforts are being made to develop environmentally friendly energy sources. Generating electric energy using wind turbines is one of the methods that has gained widespread, ...
    • Miljøkvalitet i Hardangerfjorden 

      Husa, Vivian; Kutti, Tina; Hansen, Pia Kupka; Sjøtun, Kjersti; Steen, Henning; Aure, Jan (Conference object, 2013-05-03)
    • Mulighetskartlegging for kystbaserte næringer i Østfold 

      Kaste, Øyvind; Dahl, Einar; Gaeta, Federico Håland; Hess-Erga, Ole-Kristian; Johnsen, Kathrine Ivsett; Kildahl, Henriette Othilie Bøe; Steen, Henning; Albretsen, Jon (NIVA-rapport, Research report, 2020)
      En rekke utredninger og strategidokumenter, både på internasjonalt og nasjonalt nivå, peker på at det er et stort potensial for økt vekst og verdiskaping knyttet til marine næringer. Viken fylkeskommune og kommunene langs ...
    • Prøvehøsting av stortare i Nord-Trøndelag – Gjenvekstundersøkelser 2010–2014 

      Steen, Henning; Moy, Frithjof; Bodvin, Torjan (Rapport fra Havforskningen;Nr. 37-2014, Working paper, 2014-12-31)
      The Institute of Marine Research monitored the kelp (Laminaria hyperborea) vegetation and sea urchin populations in Nord-Trøndelag in 2014. The survey included previously kelp harvested areas and nearby reference areas, ...
    • Rapid Coastal Survey in Norwegian Waters 

      Husa, Vivian; Agnalt, Ann-Lisbeth; Svensen, Rudolf; Heggøy, Erling; Handå Bysveen, Ingrid; Holmern, Tomas; Rokkan-Iversen, Kriss; Steen, Henning; Jelmert, Anders; Farestvedt, Eva; Petersen, Helen (Conference object, 2012-09)