Stein Fredriksen

Image of Stein Fredriksen
Norwegian version of this page
Phone +47 22854558
Room 4303
Username
Visiting address Blindernveien 31 0371 Oslo
Postal address Postboks 1066 Blindern 0316 Oslo

Academic interests

I work with benthic algae, with a particular focus on kelp forests. I am involved with solving of problems associated with charting flora in special environments, i.e. Svalbard. In the last few years also projects linked to seagrass as a habitat been of importance. I have contributed and been head of  groups regarding eutrophication and outlet of nutrients from fish farming.

Teaching

Higher education and employment history

Previous academic positions:

  • 2004- pres. Professor at the Department of Biology
  • 1995-2004 Associate Professor at the Department of Biology
  • Prior 1995 Hired on different projects

Education:

  • 1994 Dr. scient. UiO
  • 1985 Cand. real. University of Bergen

 Honoraria

  • Recieved the "Golden Pointer" from Biologisk Fagutvalg as evidence of being the best lecturer at the institute.

Academic cooperation

I have for the last 20 years worked very closely with people at the Norwegian Department for Water Research (NIVA). I also collaborate with several foreign partners on different projects on kelp forest- and seaweed research. The last years I have also fucused on benthic algal vegetation on Svalbard, in close cooperation with UNIS avd AWI (Germany).

Tags: Algae, Marine algae, Benthic algae, Kelp forest, Ecology, Seagrass systems, Eelgrass, Biodiversity, Shallow water ecology, Systematics

Publications

Papers since 2015

Fagerli CW, Stadnizenko SG, Pedersen MF, Christie H, Fredriksen S & KM Norderhaug 2015. Population dynamics of Strongylocentrotus droebachiensisin kelp forest and barren grounds in Norway. Marine Biology 162:1215-1226. DOI 10.1007/s00227-015-2663-3

Duffy Emmett J., Pamela L. Reynolds, Christoffer Boström, James A. Coyer, Mathieu Cusson, Serena Donadi, James G. Douglass, Johan S. Eklöf, Aschwin H. Engelen, Britas Klemens Eriksson,Stein Fredriksen, Lars Gamfeldt, Camilla Gustafsson, Galice Hoarau, Masakazu Hori, Kevin Hovel, Katrin Iken, Jonathan S. Lefcheck, Per-Olav Moksnes, Masahiro Nakaoka, Mary I. O'Connor, Jeanine L. Olsen, J. Paul Richardson, Jennifer L. Ruesink, Erik E. Sotka, Jonas Thormar,Matthew A. Whalen& John J. Stachowicz.  2015. Biodiversity mediates top–down control in eelgrass ecosystems: a global comparative-experimental approach. Ecology letters 18: 696-705. DOI: 10.1111/ele.12448

Fredriksen S, Gabrielsen TM, Kile MR & K Sivertsen. 2015. Benthic algal vegetation in Isfjorden, Svalbard. A survey from the main fjord area. Polar Research. http://dx.doi.org/10.3402/polar.v34.25994

Bartsch I, Paar M, Fredriksen S, Schwanitz M, Daniel C, Hop H & C Wiencke  2016. Changes in kelp forest biomass and depth distribution in Kongsfjorden, Svalbard, between 1996-1998 and 2012-2014 reflect Arctic warming. Polar Biology 39: 2021-2036. DOI 10.1007/s00300-015-1870-1

Eva Ramirez-Llodra, Eli Rinde, Hege Gundersen, Hartvig Christie, Camilla With Fagerli, Stein Fredriksen, Janne Kim Gitmark, Karl Norling, Mats Gunnar Walday&
Kjell Magnus Norderhaug. 2016. A snap shot of the short-term response of crustaceans to macrophyte detritus in the deep Oslofjord. Scientific Report 6, 23800. doi: 10.1038/srep23800 

Araujo R, Assis J, Aguillar R, .. Fredriksen S, 22 more. 2016. Status, trends and drivers of kelp forests in Europe: an expert assessment. Biodiversity and Conservation. DOI: 10.1007/s10531-016-1141-7

Fagerli CW, Stadniczenko SG, Pedersen MF, Christie H, Fredriksen S, Norderhaug KM. 2016. Are skeletal ossicles in echinoids unreliable chronometers? Reply to Russell and Narváez comment on “Population dynamics
of Strongylocentrotus droebachiensis in kelp forests and barren grounds in Norway” by Fagerli et al. 2015. Marine Biology 163: 160-161.

Silberberger M, Thormar J, Fredriksen S. 2016. Small scale removal of seagrass (Zostera marina): Effects on the infaunal community. Marine Biology Research12:993-1002. DOI: 10.1080/17451000.2016.1225959

Viviana Peña, Line Le Gall, Vivian Husa, Ellen Sofie Grefsrud, Jason Hall-Spencer, Bob Steneck, Stein Fredriksen, Olivier De Clerck, Janne Gitmark, Marc Angles d'Auriac, Trine Bekkby, Hartvig Christie  & Eli Rinde. 2016. Reseña de proyecto: Coralalg,la biodiversidad marina oculta en noruega: búsqueda de especies crípticas en algas rojas coralinas (Norway's hidden marine biodiversity: the hunt for cryptic species within the coralline algae). Algas: Boletín Informativo de la Sociedad Española de Ficología 52: 55-58.

Abdullah MI, Fredriksen S, Christie H. 2017. The impact of the kelp (Laminaria hyperborea) forest on the organic matter content in sediment of the west coast of Norway. Marine Biology Research 13:151-160. DOI:10.1080/17451000.2016.1240369

Steen H, Fredriksen S, Moy F. 2018. Kelp restoration – the seeded gravel approach. MERCES News Letter 4:28 – 30.

Fredriksen S, Karsten U, Bartsch I, Woelfel J, Koblowsky M, Schumann R, Moy SR, Steneck RS, Wiktor J, Hop H & C Wiencke 2019. Biodiversity of benthic macro- and microalgae from Svalbard with special focus on Kongsfjorden. Advances in Polar Ecology 2, pp 331-371

Kai Bischof, Christian Buschbaum, Stein Fredriksen, Francisco J.L. Gordillo, Sandra Heinrich, Carlos Jiménez, Cornelius Lütz, Markus Molis, Michael Y. Roleda, Max Schwanitz, Christian Wiencke. 2019. Kelps and environmental changes in Kongsfjorden: Stress perception and responses. Advances in Polar Ecology 2, pp 373-422

Filbee-Dexter K, Wernberg T, Fredriksen S, Norderhaug KM, Pedersen MF 2019. Arctic kelp forests: Diversity, resilience and future. Global and planetary change 172:1-14.

Evankow A, Christie H, Hancke K, Brysting AK, Junge C, Fredriksen S, Thaulow J 2019. Genetic heterogeneity of two bioeconomically important kelp species along the Norwegian coast. Conservation Genetics. 20:615-628.  https://doi.org/10.1007/s10592-019-01162-8

Anglés d´Auriac MB, Le Gall L, Pena V, Hall-Spencer JM, Steneck RS, Fredriksen S, Gitmark J, Christie H, Husa V, Grefsrud ES, Rinde E. 2019. Efficient coralling algal psbA mini barcoding and high resolution melt (HRM) analysis using a simple custom DNA preparation. Scientific reports, 9:578. DOI:10.1038/s41598-018-36998-6

Bekkby T, Smit C, Gundersen H, Rinde E, Steen H, Tveiten L, Gitmark JK, Fredriksen S, Albretsen J, Christie HC. 2019. The abundance of kelp is modified by the combined impact of depth, waves and currents. Frontiers in Marine Science 6:475. DOI: 10.3389/fmars.2019.00475

Barboza FR, Kotta J, Weinberger F, Jormalainen V, Kraufvelin P, Molis M, Schubert H, Pavia H, Nylund GM, Kautsky L, Schagerström E, Rickert E, Saha M, Fredriksen S, Martin G, Torn K, Ruuskanen A, Wahl M. 2019. Geographic variation in fitness-related traits of the bladderwrack Fucusvesiculosusalong the Baltic Sea – North Sea salinity gradient. Ecology and Evolution. h t t p s : //d o i .org/10.1002/ece3.5470

Sandvik H, et al. inkl S. Fredriksen 2019. Alien plants, animals, fungi and algae in Norway: an inventory of neobiota. Biological invasions. https://doi.org/10.1007/s10530-019-02058-x

Filbee-Dexter K, Pedersen MF, Fredriksen S, Norderhaug KM, Rinde E, Kristiansen T, Albretsen J, Wernberg T 2020. Carbon export is facilitated by seaurchins transforming kelp detritus. Oecologia 192:213-225.

Pedersen MF, Filbee-Dexter K, Norderhaug KM, Fredriksen S, Frisk NL, Fagerli CW, Wernberg T 2020. Detrital carbon production and export in high latitude kelp forest. Oecologia 192:227-239.

Daniel Vilas, Marta Coll, Torstein Pedersen, Xavier Corrales, Karen Filbee-Dexter, Morten Foldager Pedersen, Kjell Magnus Norderhaug, Stein Fredriksen, Thomas Wernberg, Eva Ramírez-Llodra 2020. Kelp-carbon uptake by Arctic deep-sea food webs plays a noticeable role in maintaining ecosystem structural and functional traits. Journal of Marine Systems 203 (2020) 103268. https://doi.org/10.1016/j.jmarsys.2019.103268

Fredriksen S, K. Filbee-Dexter, K. M. Norderhaug, H. Steen, T. Bodvin, M. A. Coleman, F. Moy, T. Wernberg. 2020. Green gravel: a novel restoration tool to combat kelp forests decline. Scientific Reports 10:3983 | https://doi.org/10.1038/s41598-020-60553-x

 

  • Filbee-Dexter, Karen; Pedersen, Morten Foldager; Fredriksen, Stein; Norderhaug, Kjell Magnus; Rinde, Eli; Kristiansen, Trond; Albretsen, Jon & Wernberg, Thomas (2020). Carbon export is facilitated by sea urchins transforming kelp detritus. Oecologia.  ISSN 0029-8549.  192, s 213- 225 . doi: 10.1007/s00442-019-04571-1 Full text in Research Archive.
  • Pedersen, Morten Foldager; Filbee-Dexter, Karen; Norderhaug, Kjell Magnus; Fredriksen, Stein; Frisk, Nicolai Lond; Fagerli, Camilla With & Wernberg, Thomas (2020). Detrital carbon production and export in high latitude kelp forests. Oecologia.  ISSN 0029-8549.  192(1), s 227- 239 . doi: 10.1007/s00442-019-04573-z Full text in Research Archive.
  • 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 (2020). Alien species in Norway: results from quantitative ecological impact assessments. Ecological Solutions and Evidence.  ISSN 2688-8319.  1(1) . doi: 10.1002/2688-8319.12006 Full text in Research Archive. Show summary
  • Vilas, Daniel; Coll, Marta; Pedersen, Torstein; Corrales, Xavier; Filbee-Dexter, Karen; Pedersen, Morten Foldager; Norderhaug, Kjell Magnus; Fredriksen, Stein; Wernberg, Thomas & Ramirez-Llodra, Eva (2020). Kelp-carbon uptake by Arctic deep-sea food webs plays a noticeable role in maintaining ecosystem structural and functional traits. Journal of Marine Systems.  ISSN 0924-7963.  203 . doi: 10.1016/j.jmarsys.2019.103268 Show summary
  • Anglès d'Auriac, Marc B; Le Gall, Line; Peña, Viviana; Hall-Spencer, Jason M; Steneck, Robert S; Fredriksen, Stein; Gitmark, Janne; Christie, Hartvig; Husa, Vivian; Grefsrud, Ellen Sofie & Rinde, Eli (2019). Efficient coralline algal psbA mini barcoding and High Resolution Melt (HRM) analysis using a simple custom DNA preparation. Scientific Reports.  ISSN 2045-2322.  9(1) . doi: 10.1038/s41598-018-36998-6 Full text in Research Archive. Show summary
  • Barboza, Francisco R.; Kotta, Jonne; Weinberger, Florian; Jormalainen, Veijo; Kraufvelin, Patrik; Molis, Markus; Schubert, Hendrik; Pavia, Henrik; Nylund, Göran M.; Kautsky, Lena; Schagerström, Ellen; Rickert, Esther; Saha, Mahasweta; Fredriksen, Stein; Martin, Georg; Torn, Kaire; Ruuskanen, Ari & Wahl, Martin (2019). Geographic variation in fitness-related traits of the bladderwrack Fucus vesiculosus along the Baltic Sea – North Sea salinity gradient. Ecology and Evolution.  ISSN 2045-7758.  9(16), s 9225- 9238 . doi: 10.1002/ece3.5470 Full text in Research Archive.
  • Bekkby, Trine; Smit, Cecilie; Gundersen, Hege; Rinde, Eli; Steen, Henning; Tveiten, Lise; Gitmark, Janne K; Fredriksen, Stein; Albretsen, Jon & Christie, Hartvig (2019). The Abundance of Kelp Is Modified by the Combined Impact of Depth, Waves and Currents. Frontiers in Marine Science.  ISSN 2296-7745.  6 . doi: 10.3389/fmars.2019.00475 Full text in Research Archive. Show summary
  • Bischof, Kai; Buschbaum, Christian; Fredriksen, Stein; Gordillo, Francisco J. L.; Heinrich, Sandra; Jimenez, Carlos; Lütz, Cornelius; Molis, Markus; Roleda, Michael Y.; Schwanitz, Max & Wiencke, Christian (2019). Kelps and Environmental Changes in Kongsfjorden: Stress Perception and Responses, In Haakon Hop & Christian Wiencke (ed.),  The Ecosystem of Kongsfjorden, Svalbard.  Springer.  ISBN 978-3-319-46423-7.  10.  s 373 - 422
  • Evankow, Ann; Christie, Hartvig C; Hancke, Kasper; Brysting, Anne K; Junge, Claudia; Fredriksen, Stein & Thaulow, Jens (2019). Genetic heterogeneity of two bioeconomically important kelp species along the Norwegian coast. Conservation Genetics.  ISSN 1566-0621.  20(3), s 615- 628 . doi: 10.1007/s10592-019-01162-8 Full text in Research Archive. Show summary
  • Filbee-Dexter, Karen; Wernberg, Thomas; Fredriksen, Stein; Norderhaug, Kjell Magnus & Pedersen, Morten Foldager (2019). Arctic kelp forests: Diversity, resilience and future. Global and Planetary Change.  ISSN 0921-8181.  172, s 1- 14 . doi: 10.1016/j.gloplacha.2018.09.005 Full text in Research Archive.
  • Fredriksen, Stein; Karsten, Ulf; Bartsch, Inka; Woelfel, Jana; Koblowsky, Miriam; Schumann, Rhena; Moy, Siri Røang; Steneck, Robert S.; Wiktor, Józef M.; Hop, Haakon & Wiencke, Christian (2019). Biodiversity of Benthic Macro- and Microalgae from Svalbard with Special Focus on Kongsfjorden, In Haakon Hop & Christian Wiencke (ed.),  The Ecosystem of Kongsfjorden, Svalbard.  Springer.  ISBN 978-3-319-46423-7.  9.  s 331 - 371
  • 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; Brandrud, Tor Erik; Elven, Hallvard; Endrestøl, Anders; Finstad, Anders Gravbrøt; Fredriksen, Stein; Gammelmo, Øivind; Gjershaug, Jan Ove; Gulliksen, Bjørn; Hamnes, Inger; Hatteland, Bjørn Arild; Hegre, Hanne; Hesthagen, Trygve; Jelmert, Anders; Jensen, Thomas C; Johnsen, Stein Ivar; Karlsbakk, Egil; Magnusson, Christer; Nedreaas, Kjell; Nordén, Björn; Oug, Eivind; Pedersen, Oddvar; Pedersen, Per Anker; Sjøtun, Kjersti; Skei, Jon Kristian; Solstad, Heidi; Sundheim, Leif; Swenson, Jon E; Syvertsen, Per Ole; Talgø, Venche; Vandvik, Vigdis; Westergaard, Kristine B; Wienerroither, Rupert; Ytrehus, Bjørnar; Hilmo, Olga; Henriksen, Snorre & Gederaas, Lisbeth (2019). Alien plants, animals, fungi and algae in Norway: an inventory of neobiota. Biological Invasions.  ISSN 1387-3547.  21(10), s 2997- 3012 . doi: 10.1007/s10530-019-02058-x Full text in Research Archive. Show summary
  • Abdullah, Mohamed I; Fredriksen, Stein & Christie, Hartvig (2017). The impact of the kelp (Laminaria hyperborea) forest on the organic matter content in sediment of the west coast of Norway. Marine Biology Research.  ISSN 1745-1000.  13(2), s 151- 160 . doi: 10.1080/17451000.2016.1240369
  • Husa, Vivian; Hansen, Pia Kupka; Bannister, Raymond; Kutti, Tina & Fredriksen, Stein (2017). Utslipp av partikulære og løste stoffer fra matfiskanlegg. Fisken og Havet, Særnummer.  ISSN 0802-0620.  (2), s 99- 116
  • Bartsch, Inka; Paar, Martin; Fredriksen, Stein; Schwanitz, Max; Daniel, Claudia; Hop, Haakon & Wiencke, Christian (2016). Changes in kelp forest biomass and depth distribution in Kongsfjorden, Svalbard, between 1996–1998 and 2012–2014 reflect Arctic warming. Polar Biology.  ISSN 0722-4060.  39, s 2021- 2036 . doi: 10.1007/s00300-015-1870-1
  • de Araújo, Rita M. dos Santos Fernandes; Assis, Jorge; Aguillar, Ricardo; Airoldi, Laura; Bárbara, Ignacio; Bartsch, Inka; Bekkby, Trine; Christie, Hartvig C; Davoult, Dominique; Derrien-Courtel, Sandrine; Fernández, Consolación; Fredriksen, Stein; Gevaert, Francois; Gundersen, Hege; Le Gal, Aodren; Lévêque, Laurent; Mieszkowska, Nova; Norderhaug, Kjell Magnus; Oliveira, Pedro; Puente, Araceli; Rico, José M.; Rinde, Eli; Schubert, Hendrik; Strain, Elisabeth M.A.; Valero, Myriam; Viard, Frédérique & Sousa-Pinto, Isabel (2016). Status, trends and drivers of kelp forests in Europe: an expert assessment. Biodiversity and Conservation.  ISSN 0960-3115.  25(7), s 1319- 1348 . doi: 10.1007/s10531-016-1141-7
  • Peña, Viviana; Le Gall, L; Husa, Vivian; Grefsrud, Ellen Sofie; Hall-Spencer, Jason M.; Steneck, Robert S.; Fredriksen, Stein; De Clerck, Olivier; Gitmark, Janne Kim; Anglès d'Auriac, Marc; Bekkby, Trine; Christie, Hartvig C & Rinde, Eli (2016). Reseña de proyecto: Coralalg, la biodiversidad marina oculta en noruega: búsqueda de especies crípticas en algas rojas coralinas (Norway's hidden marine biodiversity: the hunt for cryptic species within the coralline algae).. Algas: Boletín Informativo de la Sociedad Española de Ficología.  ISSN 1695-8160.  52, s 55- 58
  • 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 (2016). A snap shot of the short-term response of crustaceans to macrophyte detritus in the deep Oslofjord. Scientific Reports.  ISSN 2045-2322.  6 . doi: 10.1038/srep23800 Full text in Research Archive.
  • Silberberger, Marc Jürgen; Thormar, Jonas & Fredriksen, Stein (2016). Small-scale removal of seagrass (Zostera marina L.): effects on the infaunal community. Marine Biology Research.  ISSN 1745-1000.  12, s 993- 1002 . doi: 10.1080/17451000.2016.1225959
  • Duffy, J. Emmett; Reynolds, Pamela L.; Boström, Christoffer; Coyer, James A.; Cusson, Mathieu; Donadi, Serena; Douglass, James G.; Eklöf, Johan S.; Engelen, Aschwin H.; Eriksson, Britas Klemens; Fredriksen, Stein; Gamfeldt, Lars; Gustafsson, Camilla; Hoarau, Galice; Hori, Masakazu; Hovel, Kevin; Iken, Katrin; Lefcheck, Jonathan S.; Moksnes, Per-Olav; Nakaoka, Masahiro; O'Connor, Mary I.; Olsen, Jeanine L.; Richardson, J. Paul; Ruesink, Jennifer L.; Sotka, Erik E.; Thormar, Jonas Gjaldbæk; Whalen, Matthew A. & Stachowicz, John J. (2015). Biodiversity mediates top-down control in eelgrass ecosystems: a global comparative-experimental approach. Ecology Letters.  ISSN 1461-023X.  18(7), s 696- 705 . doi: 10.1111/ele.12448
  • Fagerli, Camilla With; Stadniczenko, Sandra Gran; Pedersen, Morten Foldager; Christie, Hartvig C; Fredriksen, Stein & Norderhaug, Kjell Magnus (2015). Population dynamics of Strongylocentrotus droebachiensis in kelp forests and barren grounds in Norway. Marine Biology.  ISSN 0025-3162.  162(6), s 1215- 1226 . doi: 10.1007/s00227-015-2663-3
  • Fredriksen, Stein; Gabrielsen, Tove M.; Kile, Maia Røst & Sivertsen, Knut (2015). Benthic algal vegetation in Isfjorden, Svalbard. Polar Research.  ISSN 0800-0395.  34, s 1- 9 . doi: 10.3402/polar.v34.25994 Full text in Research Archive.
  • Abdullah, Mohamed I & Fredriksen, Stein (2014). The exudation of nitrate by the kelp Laminaria hyperborea, an observation during in situ incubation experiments. Marine Biology Research.  ISSN 1745-1000.  10(7), s 725- 730 . doi: 10.1080/17451000.2013.850514
  • 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 (2014). Distribution, structure and function of Nordic eelgrass (Zostera marina) ecosystems: Implications for coastal management and conservation. Aquatic conservation.  ISSN 1052-7613.  24(3), s 410- 434 . doi: 10.1002/aqc.2424 Full text in Research Archive. Show summary
  • Fagerli, Camilla With; Norderhaug, Kjell Magnus; Christie, Hartvig C; Pedersen, Morten Foldager & Fredriksen, Stein (2014). Predators of the destructive sea urchin grazer Strongylocentrotus droebachiensis on the Norwegian coast. Marine Ecology Progress Series.  ISSN 0171-8630.  502, s 207- 218 . doi: 10.3354/meps10701 Full text in Research Archive. Show summary
  • Fredriksen, Stein; Bartsch, I & Wiencke, Christian (2014). New additions to the benthic marine flora of Kongsfjorden, western Svalbard, and comparison between 1996/1998 and 2012/2013. Botanica Marina.  ISSN 0006-8055.  57(3), s 203- 216 . doi: 10.1515/bot-2013-0119
  • Pedersen, Morten foldager; Nejrup, Lars; Pedersen, Troels & Fredriksen, Stein (2014). Sub-canopy light conditions only allow low annual net productivity of epiphytic algae on kelp Laminaria hyperborea. Marine Ecology Progress Series.  ISSN 0171-8630.  516, s 163- 176 . doi: 10.3354/meps11019
  • Fredriksen, Stein & Kile, Maia Røst (2012). The algal vegetation in the outer part of Isfjorden, Spitsbergen: revisiting Per Svendsen's sites 50 years later. Polar Research.  ISSN 0800-0395.  31 . doi: 10.3402/polar.v31i0.17538
  • Pedersen, Morten F; Nejrup, Lars B; Fredriksen, Stein; Christie, Hartvig C & Norderhaug, Kjell Magnus (2012). Effects of wave exposure on population structure, demography, biomass and productivity of the kelp Laminaria hyperborea. Marine Ecology Progress Series.  ISSN 0171-8630.  451, s 45- 60 . doi: 10.3354/meps09594
  • Andersen, Guri Sogn; Steen, Henning; Christie, Hartvig C; Fredriksen, Stein & Moy, Frithjof (2011). Seasonal Patterns of Sporophyte Growth, Fertility, Fouling, and Mortality of Saccharina latissima in Skagerrak, Norway: Implications for Forest Recovery. Journal of Marine Biology.  ISSN 1687-9481.  2011 . doi: 10.1155/2011/690375
  • Fredriksen, Stein; De Backer, Annelies; Boström, C. & Christie, Hartvig C (2010). Infauna from Zostera marina L. meadows in Norway. Differences in vegetated and unvegetated areas. Marine Biology Research.  ISSN 1745-1000.  6, s 189- 200 . doi: 10.1080/17451000903042461
  • Mutchler, T; Mooney, R.F; Wallace, S; Podsim, L; Fredriksen, Stein & Dunton, KH (2010). Origins and fate of inorganic-nitrogen from land to coastal ocean on the Yucatan Peninsula, Mexico, In MJ Kennish & HW Paerl (ed.),  Coastal lagoons. Critical habitats of environmental change.  CRC Press.  ISBN 978-1-4200-8830-4.  Chapter 12.  s 283 - 305
  • Christie, H.; Norderhaug, K.M. & Fredriksen, Stein (2009). Macrophytes as habitat for fauna. Marine Ecology Progress Series.  ISSN 0171-8630.  396, s 221- 233 . doi: 10.3354/meps08351
  • Nilsen, Marianne; Pedersen, Torstein; Nilsen, Einar Magnus & Fredriksen, Stein (2008). Trophic studies in a high-latitude fjord ecosystem – a comparison of stable isotope analyses (δ13C and δ15N) and trophic-level estimates from a mass-balance model. Canadian Journal of Fisheries and Aquatic Sciences.  ISSN 0706-652X.  65, s 2791- 2806
  • Nilsen, marianne; Pedersen, Torstein; Nilssen, Einar Magnus & Fredriksen, Stein (2008). Trophic studies in a high-latitude fjord ecosystem - a comparison of stable isotope analyses (delta 13C and delta 15N)and trophic-level estimates from a mass-balance model. Canadian Journal of Fisheries and Aquatic Sciences.  ISSN 0706-652X.  65(12), s 2791- 2806 . doi: 10.1016/j.dsr2.2008.05.008
  • Mutchler, T; Dunton, K; Townsend-Small, A; Fredriksen, Stein & Rasser, M (2007). Isotopic and elemental indicators of nutrient sources and status of coastal habitats in the Caribbean Sea, Yucatan Peninsula, Mexico. Estuarine, Coastal and Shelf Science.  ISSN 0272-7714.  74, s 449- 457 . doi: 10.1016/j.ecss.2007.04.005
  • Norderhaug, K.M.; Christie, H. & Fredriksen, Stein (2007). Is habitat size an important factor for faunal abundances on kelp (Laminaria hyperborea)?. Journal of Sea Research.  ISSN 1385-1101.  58, s 120- 124 . doi: 10.1016/j.seares.2007.03.001
  • Norderhaug, K.M.; Nygaard, K. & Fredriksen, Stein (2006). Importance of phlorotannin content and C:N ratio of Laminaria hyperborea in determining its palatability as food for consumers. Marine Biology Research.  ISSN 1745-1000.  2, s 367- 371
  • Rueness, Jan; Bjærke, M.R.; Fredriksen, Stein; Langangen, Anders; Lindstrøm, Eli Anne; Moy, Frithjof & Sjøtun, Kjersti (2006). Alger. Cyanophyta, Rhodophyta, Phaeophyta, Ulvophyceae, Charophyceae, I: J.A. Kålås; Å. Viken & T. Bakken (red.),  Norsk Rødliste 2006.  Artsdatabanken.  ISBN 8292838007.  Kapittel.  s 95 - 101
  • Fredriksen, Stein; Christie, H. & Sæthre, Bjarte Andre (2005). Species richness in macroalgae and macrofauna assemblages on Fucus serratus L. (Phaeophyceae) and Zostera marina L. (Angiospermae) in Skagerrak, Norway. Marine Biology Research.  ISSN 1745-1000.  1(1), s 2- 19 Show summary
  • Norderhaug, K.M.; Christie, H.; Fosså, Jan Helge & Fredriksen, Stein (2005). Fish - macrofauna interactions in a kelp (Laminaria hyperborea) forest. Journal of the Marine Biological Association of the United Kingdom.  ISSN 0025-3154.  85, s 1279- 1286
  • Abdullah, Mohamed I & Fredriksen, Stein (2004). Production, respiration, and exudation of dissolved organic matter by the kelp Laminaria hyperborea along the west coast of Norway. Journal of the Marine Biological Association of the United Kingdom.  ISSN 0025-3154.  84, s 887- 894
  • Fredriksen, Stein; Christie, H. & Boström, Christoffer (2004). Deterioration of eelgrass (Zostera marina L.) through destructive grazing by the gastropod Rissoa membranacea (J. Adams). Sarsia.  ISSN 0036-4827.  89, s 218- 222
  • Bjærke, M.R. & Fredriksen, Stein (2003). Epiphytes on the invasive species Sargassum muticum at Verdens Ende, South Norway. Sarsia.  ISSN 0036-4827.  88, s 353- 364
  • Fredriksen, Stein (2003). Food web studies in a Norwegian kelp forest based on stable isotope (?13C and ?15N) analysis. Marine Ecology Progress Series.  ISSN 0171-8630.  260, s 71- 81
  • Fredriksen, Stein (2003). Zostera marina (Angiospermae) and Fucus serratus (Phaeophyceae) as habitat for flora and fauna � seasonal and local variation. Proceedings / International Seaweed Symposium.  17, s 357- 364
  • Norderhaug, Kjell Magnus; Fredriksen, Stein & Nygaard, K. (2003). The trophic importance of Laminaria hyperborea to kelp forest consumers and the importance of bacterial degradation on food value. Marine Ecology Progress Series.  ISSN 0171-8630.  255, s 135- 144

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  • Grünfeld, Lars Andreas Holm; Bekkby, Trine; Gundersen, Hege; Hancke, Kasper & Fredriksen, Stein (2020). Et taredyrkingsanleggs rolle som kunstig tareskog. Sammenlikning av faunasamfunn mellom dyrket butare (Alaria esculenta) og naturlig tareskog. Show summary
  • 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 (2020). Data from: Ecological impact assessments of alien species in Norway. [www ].
  • Torstensen, Ragnhild Ryther Grimm; Bekkby, Trine; Gundersen, Hege; Hancke, Kasper & Fredriksen, Stein (2020). Miljøeffekter ved dyrking av sukkertare (Saccharina latissima) Et taredyrkingsanleggs rolle som kunstig habitat. Show summary
  • Bekkby, Trine; Andersen, Guri Sogn; Angeltveit, Gro; Broch, Ole Jacob; Bøe, Reidulv; Christie, Hartvig C; Erikstad, Lars; Espeland, Sigurd Heiberg; Fagerli, Camilla With; Fredriksen, Stein; Gitmark, Janne Kim; Gundersen, Hege; Hancke, Kasper; Kile, Maia Røst; Moy, Frithjof Emil; Moy, Siri Røang; Norderhaug, Kjell Magnus; Rinde, Eli; Smit, Cecilie; Steen, Henning & Tveiten, Lise Ann (2019). Added values from the large-scale and long-lasting program for mapping marine habitats.
  • Burgunter-Delamare, B; Fredriksen, Stein; Rousvoal, Sylvie; Boyen, Catherine & Dittami, Simon (2019). Exploring the Saccharina latissima microbiome.
  • Fredriksen, Stein (2019). Mer mat fra havet?.
  • Petride, Newt & Fredriksen, Stein (2019). Growth of two red algae species Palmaria palmata and Vertebrata lanosa in lab culture.
  • Rinde, Eli; Peña, Viviana; LeGall, Lene; Angles d'Auriac, Marc; Hall-Spencer, Jason M.; Robert S, Steneck; Gitmark, Janne Kim; Husa, Vivian; Grefsrud, Ellen Sofie; Fredriksen, Stein; Bekkby, Trine & Christie, Hartvig C (2019). De allestedsnærværende kalkalgene - et svært, rosa kunnskapshull langs norskekysten?.
  • Gundersen, Hege; Bekkby, Trine; Oug, Eivind; Norderhaug, Kjell Magnus; Fredriksen, Stein & Rinde, Eli (2018). Marin gruntvann. Norsk rødliste for naturtyper 2018.
  • Rinde, Eli; Angles d'Auriac, Marc; Bekkby, Trine; Christie, Hartvig C; Fredriksen, Stein; Gitmark, Janne Kim; Grefsrud, Ellen Sofie; Hall-Spencer, Jason M.; Husa, Vivian; Le Gall, L; Peña, Viviana & Steneck, Robert S. (2018). Norways hidden marine biodiversity: the hunt for cryptic species within the coralline algae.
  • Smit, Cecilie; Bekkby, Trine; Gundersen, Hege & Fredriksen, Stein (2018). Hva påvirker variasjon i tetthet av stortare Laminaria hyperborea langs Norges kyst? En analyse fra Norskehavet sør til Skagerrak. Show summary
  • Bartsch, Inka; Paar, Martin; Fredriksen, Stein; Hop, Haakon; Asmus, Ragnhild; Asmus, Harald; Zacher, Katharina; Bischof, Kai & Wiencke, Christian (2017). Arctic warming affects kelp forest with associated fauna in Kongsfjorden, Svalbard.
  • Bischof, Kai; Paar, Martin; Fredriksen, Stein; Wiencke, Christian; Hop, Haakon & Bartsch, Inka (2017). Retreating sea ice in coastal systems – Implications for seaweed communities in Kongsfjorden (Svalbard) and beyond.
  • Fagerli, Camilla With; Stadniczenko, Sandra Gran; Pedersen, Morten foldager; Christie, Hartvig C; Fredriksen, Stein & Norderhaug, Kjell Magnus (2016). Are skeletal ossicles in echinoids unreliable chronometers? Reply to Russell and Narváez comment on “Population dynamics of Strongylocentrotus droebachiensis in kelp forests and barren grounds in Norway” by Fagerli et al. 2015. Marine Biology.  ISSN 0025-3162.  163(7), s 160- 161 . doi: 10.1007/s00227-016-2928-5
  • Bartsch, Inka; Paar, Martin; Fredriksen, Stein & Wiencke, Christian (2015). Changes in kelp forest biomass and depth distribution in Kongsfjorden (Spitsbergen) reflect Arctic warming.
  • Bischof, Kai; Bartsch, Inka; Zachler, Katharina; Fredriksen, Stein & Wiencke, Christian (2015). Seaweed Biology in a changing Arctic.
  • Bøe, Mari; Fredriksen, Stein & Karlsen, Hans Erik (2015). Seasonal variations of fish fauna in two Zostera marina meadows in the inner Oslofjord.
  • Christie, H.; Norderhaug, K.M.; Fredriksen, Stein & Kraufvelin, Patrik (2015). How can kelp and seagrass beds persist being both food and habitat?.
  • Evankov, Ann Marie; Fredriksen, Stein; Christie, H.; Junge, Claudia & Brysting, Anne Krag (2015). Population genetic diversity and structure of two kelp species (Laminariales) in Norway.
  • Evankow, Ann; Fredriksen, Stein; Christie, Hartvig C; Junge, Claudia & Brysting, Anne Krag (2015). Genetic tools reveal diversity and structure of kelp forests in Norway.
  • Fredriksen, Stein; Moy, Frithjof Emil; Husa, Vivian; Sjøtun, Kjersti & Schneider, Susanne Claudia (2015). Alger Cyanophyta, Rhodophyta, Chlorophyta, Ochrophyta, I: Snorre Henriksen & Olga Hilmo (red.),  Norsk rødliste for arter 2015. Versjon 1.2.  Artsdatabanken.  ISBN 978-82-92838-41-9.  Alger.
  • Fredriksen, Stein & Sjøtun, Kjersti (2015). Risikovurdering ved utseting av ikke-stedegen tare.
  • Norderhaug, K.M.; Fagerli, Camilla; Andersen, Guri Sogn; Christie, H.; Moy, Frithjof Emil; Gundersen, Hege; Bekkby, Trine; Rinde, Eli; Fredriksen, Stein; Pedersen, Morten foldager & Dahl, Karsten (2015). Regime shifts in Norwegian kelp forests.
  • Andersen, A; Thormar, Jonas; Norderhaug, KM & Fredriksen, Stein (2013). Benthic communities at the opera in Bjørvika.
  • Brubak, Sissel Irene; Eikrem, Wenche; Fredriksen, Stein & Edvardsen, Bente (2013). Algal culture collection at the University of Oslo. Show summary
  • Fredriksen, Stein & Wiencke, Christian (2013). RIGHT OR WRONG CONCLUSION? THE IMPORTANCE OF EQUAL PRECISIONS LEVEL IN BIODIVERSITY STUDIES.
  • Norderhaug, Kjell Magnus; Fagerli, Camilla With; Moy, Frithjof Emil; Bekkby, Trine; Andersen, Guri Sogn; Gundersen, Hege; Rinde, Eli; Fredriksen, Stein; Pedersen, Morten F & Christie, Hartvig C (2013). Climate Change and Large Scale shifts in the Geographical Distribution of NE Atlantic Kelp Forests.
  • Norderhaug, Kjell Magnus; Fagerli, Camilla With; Moy, Frithjof Emil; Bekkby, Trine; Andersen, Guri Sogn; Rinde, Eli; Fredriksen, Stein; Pedersen, Morten Foldager & Christie, Hartvig C (2013). Climate Change and Large Scale shifts in the Geographical Distribution of NE Atlantic Kelp Forests.
  • Fagerli, C.W.; Norderhaug, K.M.; Christie, H.; Pedersen, M.F. & Fredriksen, Stein (2012). Importance of climate and predation for shifts between sea urchin dominated barren grounds and kelp forests.
  • Fredriksen, Stein (2012). Bentosalgevegetasjonen på Svalbard.
  • Fredriksen, Stein; Christie, H.; Nilsen, H.L & Sivertsen, L (2012). Spatial distribution of epiphytes and mobile fauna on Zostera marina (L.) and Fucus serratus (L.) from the Skagerrak area.
  • Fredriksen, Stein; Husa, Vivian; Skjoldal, Hein Rune; Sjøtun, Kjersti; Christie, Hartvig C; Dale, Trine & Olsen, Yngvar (2012). Ingen regional overgjødsling på Vestlandet. Havforskningsrapporten.
  • Pedersen, M.F.; Nejrup, L.B.; Pedersen, T.M. & Fredriksen, Stein (2012). Biomass & productivity of epiphytic algae on kelp Laminaria hyperborea.
  • Fredriksen, Stein & Kile, Maia Røst (2011). The algal vegetation in the outer part of Isfjorden, Spitsbergen: a revisit of Per Svendsens sites after 50 years.
  • Fredriksen, Stein; Skjoldal, HR; Husa, Vivian; Olsen, Yngvar; Christie, Hartvig C; Dale, Trine & Sjøtun, Kjersti (2011). Vurdering av eutrofisituasjonen i kystområder, med særlig fokus på Hardangerfjorden og Boknafjorden.
  • Minchin, Tanya; Fredriksen, Stein & Norderhaug, K.M. (2011). What is replacing the sugar kelp in Skagerrak?.
  • Silberberger, Marc & Fredriksen, Stein (2011). Effects of disturbance on the abundance and composition of infauna in Zosera marina L. communities.
  • Fredriksen, Stein (2010). Biodiversitet i tareskog.
  • Sjøtun, Kjersti; Fredriksen, Stein; Heggøy, Erling; Husa, Vivian; Langangen, Anders Vidar; Lindstrøm, Eli-Anne; Moy, Frithjof Emil; Rueness, Jan & Åsen, Per Arvid (2010). Alger: Cyanophyta, rhodophyta, chlorophyta, ochrophyta, I:  Norsk rødliste for arter 2010. The 2010 Norwegian Red List for Species.  Artsdatabanken.  ISBN 978-82-92838-26-6.  Alger.  s 79 - 86
  • Fredriksen, Stein (2009). Stortare fra A til Å.
  • S. Forsberg, Ida; Rustad, Ida & Fredriksen, Stein (2009). Manipuleringer i fjæra i indre Oslofjord.
  • Steinhovden, Kristine & Fredriksen, Stein (2009). Temperaturtoleranser hos forskjellige isolater av sukkertare.
  • Fredriksen, Stein (2008). Tang og tare i Nord.
  • Heiaas, Harald; Thomas, Kevin; Fredriksen, Stein & Ketil, Hylland (2008). Overvåking av fotosyntetisk effektivitet i makroalger.
  • Magnusson, Jan; Christie, H.; Fredriksen, Stein & Rueness, Jan (2008). "Grønne lunger" i byen en selvfølge - men hva med det marine nærmiljøet?. Fagrådet for vann og avløpsteknisk samarbeid i indre Oslofjord.  s 13- 15
  • Fredriksen, Stein (2007). Alger som nyttevekster. Sopp og nyttevekster.  ISSN 1504-4165.  3(4), s 10- 13
  • Sogn Andersen, Guri & Fredriksen, Stein (2007). Kelp associated epiphytes, their biomass production and community structure in relation to wave exposure and season.
  • Christie, H.; Fredriksen, Stein; Magnusson, J. & Rueness, J. (2006). Marinbiologiske forbedringer av miljøet i Bjørvika/Bispervika. Vurderinger av muligheter.
  • Sogn Andersen, Guri & Fredriksen, Stein (2006). Kelp associated epiphytes and their level of biomass production in relation to wave-exposure and season.
  • Christie, H.; Fredriksen, Stein; Kraufvelin, Patrik & Norderhaug, K.M. (2005). Tang, tareskog og ålegras som leveområde og økosystem.
  • Fredriksen, Stein (2005). Tareskogsforskningen i MARE.
  • Sakshaug, Egil; Sjøtun, Kjersti; Fredriksen, Stein; Christie, Hartvig; Fosså, Jan Helge; Dale, Trine; Sivertsen, Knut & Hedlund, Nina (2002). Nedbeiting av tareskog i Norge. Rapport fra arbeidsgruppe nedsatt av Fiskeridepartementet og Miljøverndepartementet.
  • Fredriksen, Stein (2002). Kelp forest in Western Norway.

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Published Nov. 3, 2010 3:26 PM - Last modified May 18, 2020 6:22 PM

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