Blar i Brage IMR på forfatter "Steen, Henning"
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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 ... -
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 (Peer reviewed; 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. ... -
Ecosystem-level effects of large-scale disturbance in kelp forests
Norderhaug, KM; Filbee-Dexter, K; Freitas, Carla; Birkely, Sten Richard; Christensen, Lene; Mellerud, Ida Kristin; Thormar, Jonas; van Son, Thijs Christiaan; Moy, Frithjof Emil; Vázquez Alonso, M.; Steen, Henning (Peer reviewed; Journal article, 2020) -
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 ... -
Efficient spatial kelp biomass estimations using acoustic methods
Kartveit, Kyrre Heldal; Filbee-Dexter, Karen; Steen, Henning; Christensen, Lene; Norderhaug, Kjell Magnus (Peer reviewed; Journal article, 2022)Kelp forests are the largest vegetated marine ecosystem on earth, but vast areas of their distribution remain unmapped and unmonitored. Efficient and cost-effective methods for measuring the standing biomass of these ... -
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) -
Kelp forest distribution in the Nordic region
Kvile, Kristina Øie; Andersen, Guri Sogn; Baden, Susanne; Bekkby, Trine; Bruhn, Annette; Geertz-Hansen, Ole; Hancke, Kasper; Hansen, Jørgen L.S.; Krause-Jensen, Dorte; Rinde, Eli; Steen, Henning; Wegeberg, Susse; Gundersen, Hege (Peer reviewed; Journal article, 2022)Kelp forests are productive coastal ecosystems that provide a range of ecosystem services. Mapping the distribution and area occupied by kelp forests is a critical step to identify their ecosystem functions and services, ... -
Kelp help - revitalizing the sugar kelp community
Moy, Frithjof E.; Christie, Hartvig; Steen, Henning; Bodvin, Torjan (Conference object, 2008-09-08) -
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 ...