Blar i NIVA Open Access Archive på forfatter "Fredriksen, Stein"

Viser treff 1-20 av 20

    • 18S rDNA gene metabarcoding of microeukaryotes and epi-endophytes in the holobiome of seven species of large brown algae 

      Bjorbækmo, Marit Frederikke Markussen; Brodie, Juliet; Krabberød, Anders Kristian; Logares, Ramiro; Fuss, Janina; Fredriksen, Stein; Wold-Dobbe, Anders; Shalchian-Tabrizi, Kamran; Bass, David (Peer reviewed; Journal article, 2023)
      Brown algae (Phaeophyceae) are habitat-forming species in coastal ecosystems and include kelp forests and seaweed beds that support a wide diversity of marine life. Host-associated microbial communities are an integral ...

    • 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 ...

    • Alien plants, animals, fungi and algae in Norway: an inventory of neobiota 

      Sandvik, Hanno; Dolmen, Dag; Elven, Reidar; Falkenhaug, Tone; Forsgren, Elisabet; Hansen, Haakon; Hassel, Kristian; Husa, Vivian; Kjærstad, Gaute; Ødegaard, Frode; Pedersen, Hans Christian; Solheim, Halvor; Stokke, Bård Gunnar; Åsen, Per Arvid; Åström, Sandra Charlotte Helene; Brandrud, Tor Erik; Elven, Hallvard; Endrestøl, Anders; Finstad, Anders Gravbrøt; Fredriksen, Stein; Gammelmo, Øivind; Gjershaug, Jan Ove; Gulliksen, Bjørn; Hamnes, Inger Sofie; Hatteland, Bjørn Arild; Hegre, Hanne; Hesthagen, Trygve H.; Jelmert, Anders; Jensen, Thomas Correll; Johnsen, Stein Ivar; Karlsbakk, Egil; Magnusson, Christer; Nedreaas, Kjell Harald; Nordén, Björn; Oug, Eivind; Pedersen, Oddvar; Pedersen, Per Anker; Sjøtun, Kjersti; Skei, Jon Kristian; Solstad, Heidi; Sundheim, Leif; Swenson, Jon; Syvertsen, Per Ole; Talgø, Venche; Vandvik, Vigdis; Westergaard, Kristine Bakke; Wienerroither, Rupert; Ytrehus, Bjørnar; Hilmo, Olga; Henriksen, Snorre; Gederaas, Lisbeth (Journal article; Peer reviewed, 2019)
      We present the results of an inventory and status assessment of alien species in Norway. The inventory covered all known multicellular neobiota, 2496 in total, 1039 of which were classified as naturalised. The latter ...

    • 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 ...

    • 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 ...

    • 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 ...

    • Benthic algal vegetation in Isfjorden, Svalbard 

      Fredriksen, Stein; Gabrielsen, Tove M.; Kile, Maia Røst; Sivertsen, Knut (Journal article; Peer reviewed, 2015)
      Benthic algal vegetation was investigated at 10 sites in Isfjorden, Svalbard. Five sites were visited during summer 2010 and five during summer 2012. Both the littoral and sublittoral vegetation were sampled, the littoral ...

    • 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 ...

    • Distribution, structure and function of Nordic eelgrass (Zostera marina) ecosystems: Implications for coastal management and conservation 

      Boström, Christoffer; Baden, Susanne; Bockelmann, Anna-Christina; Dromph, Karsten; Fredriksen, Stein; Gustafsson, Camilla; Krause-Jensen, Dorte; Möller, Tiia; Nielsen, Søren Laurentius; Olesen, Birgit; Olsen, Jeanine; Pihl, Leif; Rinde, Eli (Journal article; Peer reviewed, 2014)
      1. This paper focuses on the marine foundation eelgrass species, Zostera marina, along a gradient from the northern Baltic Sea to the north-east Atlantic. This vast region supports a minimum of 1480km 2 eelgrass (maximum ...

    • Effects of depth and overgrowth of ephemeral macroalgae on a remote subtidal NE Atlantic eelgrass (Zostera marina) community 

      Baden, Susanne; Fredriksen, Stein; Christie, Hartvig C; Eriander, Louise; Gustafsson, Camilla; Holmer, Marianne; Olesen, Birgit; Thormar, Jonas; Boström, Christoffer (Peer reviewed; Journal article, 2022)
      We conducted a short-term field sampling complemented with time integrating stable isotope analysis to holistically investigate status and ecological interactions in a remote NE Atlantic Zostera marina meadow. We found ...

    • Efficient coralline algal psbA mini barcoding and High Resolution Melt (HRM) analysis using a simple custom DNA preparation 

      Anglès d'Auriac, Marc; Le Gall, Line; Peña, Viviana; Hall-Spencer, Jason M.; Steneck, Robert S.; Fredriksen, Stein; Gitmark, Janne Kim; Christie, Hartvig C; Husa, Vivian; Grefsrud, Ellen Sofie; Rinde, Eli (Journal article; Peer reviewed, 2019)
      Coralline algae form extensive maerl and rhodolith habitats that support a rich biodiversity. Calcium carbonate harvesting as well as trawling activities threatens this ecosystem. Eleven species were recorded so far as ...

    • Genetic heterogeneity of two bioeconomically important kelp species along the Norwegian coast 

      Evankow, Ann; Christie, Hartvig C; Hancke, Kasper; Brysting, Anne Krag; Junge, Claudia; Fredriksen, Stein; Thaulow, Jens (Journal article; Peer reviewed, 2019)
      Knowledge of genetic diversity among wild populations is becoming increasingly important as more species are recognized for their bioeconomic value. Industrialization of natural resources, such as kelp in the marine shallow ...

    • "Hanging gardens" - comparing fauna communities in kelp farms and wild kelp forests 

      Bekkby, Trine; Torstensen, Ragnhild Ryther Grimm; Grünfeld, Lars Andreas Holm; Gundersen, Hege; Fredriksen, Stein; Rinde, Eli; Christie, Hartvig C; Walday, Mats Gunnar; Andersen, Guri Sogn; Brkljacic, Marijana Stenrud; Neves, Luiza S.; Hancke, Kasper (Peer reviewed; Journal article, 2023)
      A growing need for food is causing increased interest for seaweed farming globally. This requires knowledge of the industry’s effects on the marine environment. We therefore aimed to explore the communities hosted by a ...

    • Kartlegging av et utvalg marine naturtyper i Oslofjorden 

      Rinde, Eli; Bekkby, Trine; Kvile, Kristina Øie; Andersen, Guri Sogn; Brkljacic, Marijana Stenrud; Anglès d'Auriac, Marc; Christie, Hartvig C; Fagerli, Camilla With; Fredriksen, Stein; Moy, Siri Røang; Staalstrøm, Andre; Tveiten, Lise Ann (NIVA-rapport;7605, Research report, 2021)
      Formålet med prosjektet har vært å skaffe kunnskap om et utvalg marine naturtyper i Oslofjorden, og samtidig skaffe praktisk erfaring med NiN-systemet som verktøy for å dekke miljøforvaltningens behov. Gjennom feltkartlegging ...

    • 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. ...

    • Lithothamnion (Hapalidiales, Rhodophyta) in the changing Arctic and Subarctic: DNA sequencing of type and recent specimens provides a systematics foundation 

      Peña, Viviana; Bélanger, David; Gagnon, Patrick; Richards, Joseph L.; Gall, Line Le; Hughey, Jeffery R.; Saunders, Gary W.; Lindstrom, Sandra C.; Rinde, Eli; Husa, Vivian; Christie, Hartvig C; Fredriksen, Stein; Hall-Spencer, Jason M.; Steneck, Robert S.; Schoenrock, Kathryn M.; Gitmark, Janne Kim; Grefsrud, Ellen Sofie; Anglès d'Auriac, Marc; Legrand, Erwann; Grall, Jacques; Mumford, Thomas F.; Kamenos, Nicholas A.; Gabrielson, Paul W. (Peer reviewed; Journal article, 2021)
      Coralline red algae in the non-geniculate genera Clathromorphum, Phymatolithon and Lithothamnion are important benthic ecosystem engineers in the photic zone of the Arctic and Subarctic. In these regions, the systematics ...

    • 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 ...

    • Restituering av plante- og dyreliv i Bjørvika. Utsetting av stein med tang og utsetting av kunstige rev utenfor operaen i Bjørvika 

      Christie, H.; Fredriksen, Stein (NIVA-rapport;6167, Research report, 2011)
      Som forbedringstiltak etter opprydding i Oslo havn ble det sommeren 2010 satt ut fem kunstige rev i Bjørvika, og stein med tang på toppen av skipsvollstøtten foran operaen. Etter om lag fire måneder hadde det etablert seg ...

    • The abundance of kelp is modified by the combined impact of depth, waves and currents 

      Bekkby, Trine; Smit, Cecilie; Gundersen, Hege; Rinde, Eli; Steen, Henning; Tveiten, Lise Ann; Gitmark, Janne Kim; Fredriksen, Stein; Albretsen, Jon; Christie, Hartvig C (Journal article; Peer reviewed, 2019)
      This study analyses the combined impact of two types of ocean water flow, wave exposure and ocean currents, on kelp Laminaria hyperborea abundance, taking other environmental co-variables into account. The dataset covers ...