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, and also seagrass as a Blue forest. I have contributed and been head of  groups regarding eutrophication and outlet of nutrients from fish farming. Since 2016 I have been affiliated to Institute of Marine Research in a 20% adjunct position.

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. I have also fucused on benthic algal vegetation on Svalbard, in close cooperation with UNIS avd AWI (Germany). I have cooperation with many international and national researchers and research institutions.

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

Publications

 

Since 2019:

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

Dankworth M, Heinrich S, Fredriksen S, Bartsch I. 2020. DNA barcoding and mucilage ducts in the stipe reveal the presence of Hedophyllum nigripes (Laminariales, Phaeophyceae) in Kongsfjorden (Spitsbergen). Journal of Phycology DOI:10.1111/jpy.13012

 Sandvik H, …Fredriksen S. et al. 2020. Alien species in Norway: results from quantative impact assessments. Ecological Solutions and Evidence 1,e12006  https://doi.org/10.1002/2688-8319.12006

Sandvik H, ...Fredriksen S. et al. 2020. Data from: Ecological impact of alien species in Norway. Dryad Digital Repository.  https://doi.org/10.5061/dryad.8sf7m0cjc

Filbee‐Dexter K , Wernberg T, Grace SP, Thormar J, Fredriksen S, Narvaez CN, Feehan CJ & Norderhaug KM 2020. Marine heatwaves and the collaps of marginal North Atlantic kelp forests. Scientific Reports (2020)  10:13388. https://doi.org/10.1038/s41598-020-70273-x

Haugland BT, Armitage CS, Kutti T, Husa V, Skogen MD, Bekkby T, Carvajalino-Fernandez MA, Bannister RJ, White CA, Norderhaug KM, Fredriksen S. 2021. Large-scale salmon farming in Norway impacts the epiphytic community of Laminaria hyperborea. Aquaculture Environment Interactions 13:81-100. https://doi.org/10.3354/aei00392

 

  • Peña, Viviana; Bélanger, David; Gagnon, Patrick; Richards, Joseph L.; Gall, Line Le & Hughey, Jeffery R. [Show all 23 contributors for this article] (2021). Lithothamnion (Hapalidiales, Rhodophyta) in the changing Arctic and Subarctic: DNA sequencing of type and recent specimens provides a systematics foundation. European journal of phycology. ISSN 0967-0262. 56(4), p. 468–493. doi: 10.1080/09670262.2021.1880643. Full text in Research Archive
  • Pessarrodona, Albert; Filbee-Dexter, Karen; Alcoverro, Teresa; Boada, Jordi; Feehan, Colette J. & Fredriksen, Stein [Show all 11 contributors for this article] (2021). Homogenization and miniaturization of habitat structure in temperate marine forests. Global Change Biology. ISSN 1354-1013. doi: 10.1111/gcb.15759.
  • Haugland, Barbro Taraldset; Armitage, Caroline S.; Kutti, Tina; Husa, Vivian; Skogen, Morten D. & Bekkby, Trine [Show all 11 contributors for this article] (2021). Large-scale salmon farming in Norway impacts the epiphytic community of Laminaria hyperborea. Aquaculture Environment Interactions. ISSN 1869-215X. 13, p. 81–100. doi: 10.3354/AEI00392. Full text in Research Archive
  • Filbee-Dexter, Karen; Wernberg, Thomas; Grace, S.P.; Thormar, Jonas; Fredriksen, Stein & Narvaez, C.N. [Show all 8 contributors for this article] (2020). Marine heatwaves and the collaps of marginal North Atlantic kelp forests. Scientific Reports. ISSN 2045-2322. 10. doi: 10.1038/s41598-020-70273-x. Full text in Research Archive
  • Dankworth, Marie; Heinrich, Sandra; Fredriksen, Stein & Bartsch, Inka (2020). DNA barcoding and mucilage ducts in the stipe reveal the presence of Hedophyllum nigripes (Laminariales, Phaeophyceae) in Kongsfjorden (Spitsbergen). Journal of Phycology. ISSN 0022-3646. 56, p. 1245–1254. doi: 10.1111/jpy.13012.
  • Fredriksen, Stein; Filbee-Dexter, Karen; Norderhaug, Kjell Magnus; Steen, Henning; Bodvin, Torjan & Coleman, Melinda A. [Show all 8 contributors for this article] (2020). Green gravel: a novel restoration tool to combat kelp forests decline. Scientific Reports. ISSN 2045-2322. 10, p. 1–7. doi: 10.1038/s41598-020-60553-x. Full text in Research Archive
  • Pedersen, Morten Foldager; Filbee-Dexter, Karen; Norderhaug, Kjell Magnus; Fredriksen, Stein; Frisk, Nicolai Lond & Fagerli, Camilla With [Show all 7 contributors for this article] (2020). Detrital carbon production and export in high latitude kelp forests. Oecologia. ISSN 0029-8549. 192, p. 227–239. doi: 10.1007/s00442-019-04573-z. Full text in Research Archive
  • Vilas, Daniel; Coll, Marta; Pedersen, Torstein; Corrales, Xavier; Filbee-Dexter, Karen & Pedersen, Morten Foldager [Show all 10 contributors for this article] (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. Full text in Research Archive
  • Sandvik, Hanno; Hilmo, Olga; Henriksen, Snorre; Elven, Reidar; Åsen, Per Arvid & Hegre, Hanne [Show all 51 contributors for this article] (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
  • Filbee-Dexter, Karen; Pedersen, Morten Foldager; Fredriksen, Stein; Norderhaug, Kjell Magnus; Rinde, Eli & Kristiansen, Trond [Show all 8 contributors for this article] (2020). Carbon export is facilitated by sea urchins transforming kelp detritus. Oecologia. ISSN 0029-8549. 192, p. 213–225. doi: 10.1007/s00442-019-04571-1. Full text in Research Archive
  • Bischof, Kai; Buschbaum, Christian; Fredriksen, Stein; Gordillo, Francisco J. L.; Heinrich, Sandra & Jimenez, Carlos [Show all 11 contributors for this article] (2019). Kelps and Environmental Changes in Kongsfjorden: Stress Perception and Responses. In Hop, Haakon & Wiencke, Christian (Ed.), The Ecosystem of Kongsfjorden, Svalbard. Springer. ISSN 978-3-319-46423-7. p. 373–422. doi: 10.1007/978-3-319-46425-1_10.
  • Fredriksen, Stein; Karsten, Ulf; Bartsch, Inka; Woelfel, Jana; Koblowsky, Miriam & Schumann, Rhena [Show all 11 contributors for this article] (2019). Biodiversity of Benthic Macro- and Microalgae from Svalbard with Special Focus on Kongsfjorden. In Hop, Haakon & Wiencke, Christian (Ed.), The Ecosystem of Kongsfjorden, Svalbard. Springer. ISSN 978-3-319-46423-7. p. 331–371. doi: 10.1007/978-3-319-46425-1_9.
  • Barboza, Francisco R.; Kotta, Jonne; Weinberger, Florian; Jormalainen, Veijo; Kraufvelin, Patrik & Molis, Markus [Show all 18 contributors for this article] (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), p. 9225–9238. doi: 10.1002/ece3.5470. Full text in Research Archive
  • Sandvik, Hanno; Dolmen, Dag; Elven, Reidar; Falkenhaug, Tone; Forsgren, Elisabet & Hansen, Haakon [Show all 51 contributors for this article] (2019). Alien plants, animals, fungi and algae in Norway: an inventory of neobiota. Biological Invasions. ISSN 1387-3547. 21(10), p. 2997–3012. doi: 10.1007/s10530-019-02058-x. Full text in Research Archive
  • Bekkby, Trine; Smit, Cecilie; Gundersen, Hege; Rinde, Eli; Steen, Henning & Tveiten, Lise [Show all 10 contributors for this article] (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
  • Evankow, Ann; Christie, Hartvig C; Hancke, Kasper; Brysting, Anne K; Junge, Claudia & Fredriksen, Stein [Show all 7 contributors for this article] (2019). Genetic heterogeneity of two bioeconomically important kelp species along the Norwegian coast. Conservation Genetics. ISSN 1566-0621. 20(3), p. 615–628. doi: 10.1007/s10592-019-01162-8. Full text in Research Archive
  • Anglès d'Auriac, Marc B; Le Gall, Line; Peña, Viviana; Hall-Spencer, Jason M; Steneck, Robert S & Fredriksen, Stein [Show all 11 contributors for this article] (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
  • 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, p. 1–14. doi: 10.1016/j.gloplacha.2018.09.005. Full text in Research Archive
  • 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. p. 99–116.
  • 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), p. 151–160. doi: 10.1080/17451000.2016.1240369.
  • Peña, Viviana; Le Gall, L; Husa, Vivian; Grefsrud, Ellen Sofie; Hall-Spencer, Jason M. & Steneck, Robert S. [Show all 13 contributors for this article] (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, p. 55–58.
  • 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, p. 993–1002. doi: 10.1080/17451000.2016.1225959.
  • de Araújo, Rita M. dos Santos Fernandes; Assis, Jorge; Aguillar, Ricardo; Airoldi, Laura; Bárbara, Ignacio & Bartsch, Inka [Show all 27 contributors for this article] (2016). Status, trends and drivers of kelp forests in Europe: an expert assessment. Biodiversity and Conservation. ISSN 0960-3115. 25(7), p. 1319–1348. doi: 10.1007/s10531-016-1141-7.
  • Ramirez-Llodra, Eva; Rinde, Eli; Gundersen, Hege; Christie, Hartvig; Fagerli, Camilla With & Fredriksen, Stein [Show all 10 contributors for this article] (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
  • Bartsch, Inka; Paar, Martin; Fredriksen, Stein; Schwanitz, Max; Daniel, Claudia & Hop, Haakon [Show all 7 contributors for this article] (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, p. 2021–2036. doi: 10.1007/s00300-015-1870-1.
  • Fredriksen, Stein; Gabrielsen, Tove M.; Kile, Maia Røst & Sivertsen, Knut (2015). Benthic algal vegetation in Isfjorden, Svalbard. Polar Research. ISSN 0800-0395. 34, p. 1–9. doi: 10.3402/polar.v34.25994. Full text in Research Archive
  • Duffy, J. Emmett; Reynolds, Pamela L.; Boström, Christoffer; Coyer, James A.; Cusson, Mathieu & Donadi, Serena [Show all 28 contributors for this article] (2015). Biodiversity mediates top-down control in eelgrass ecosystems: a global comparative-experimental approach. Ecology Letters. ISSN 1461-023X. 18(7), p. 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), p. 1215–1226. doi: 10.1007/s00227-015-2663-3.
  • 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, p. 163–176. doi: 10.3354/meps11019.
  • 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), p. 203–216. doi: 10.1515/bot-2013-0119.
  • 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, p. 207–218. doi: 10.3354/meps10701. 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), p. 725–730. doi: 10.1080/17451000.2013.850514.
  • Boström, Christoffer; Baden, Susanne; Bockelmann, Anna-Christina; Dromph, Karsten; Fredriksen, Stein & Gustafsson, Camilla [Show all 13 contributors for this article] (2014). Distribution, structure and function of Nordic eelgrass (Zostera marina) ecosystems: Implications for coastal management and conservation. Aquatic conservation. ISSN 1052-7613. 24(3), p. 410–434. doi: 10.1002/aqc.2424. Full text in Research Archive
  • 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, p. 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.
  • 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 Kennish, MJ & Paerl, HW (Ed.), Coastal lagoons. Critical habitats of environmental change. CRC Press. ISSN 978-1-4200-8830-4. p. 283–305.
  • 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, p. 189–200. doi: 10.1080/17451000903042461.
  • Christie, H.; Norderhaug, K.M. & Fredriksen, Stein (2009). Macrophytes as habitat for fauna. Marine Ecology Progress Series. ISSN 0171-8630. 396, p. 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, p. 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), p. 2791–2806. doi: 10.1016/j.dsr2.2008.05.008.
  • 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, p. 120–124. doi: 10.1016/j.seares.2007.03.001.
  • 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, p. 449–457. doi: 10.1016/j.ecss.2007.04.005.
  • Rueness, Jan; Bjærke, M.R.; Fredriksen, Stein; Langangen, Anders; Lindstrøm, Eli Anne & Moy, Frithjof [Show all 7 contributors for this article] (2006). Alger. Cyanophyta, Rhodophyta, Phaeophyta, Ulvophyceae, Charophyceae. In Kålås, J.A.; Viken, Å. & Bakken, T. (Ed.), Norsk Rødliste 2006. Artsdatabanken. ISSN 8292838007. p. 95–101.
  • 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, p. 367–371.

View all works in Cristin

  • Düsedau, Luisa; Fredriksen, Stein; Brand, Markus; Savoie, Amanda; Jungblut, Simon & Molis, Markus [Show all 10 contributors for this article] (2021). Macroalgal biodiversity and biomass of Kongsfjorden through time and space .
  • Sandvik, Hanno; Hilmo, Olga; Henriksen, Snorre; Elven, Reidar; Åsen, Per Arvid & Hegre, Hanne [Show all 51 contributors for this article] (2020). Data from: Ecological impact assessments of alien species in Norway.
  • Burgunter-Delamare, B; Fredriksen, Stein; Rousvoal, Sylvie; Boyen, Catherine & Dittami, Simon (2019). Exploring the Saccharina latissima microbiome.
  • Petride, Newt & Fredriksen, Stein (2019). Growth of two red algae species Palmaria palmata and Vertebrata lanosa in lab culture.
  • Fredriksen, Stein (2019). Mer mat fra havet?
  • Rinde, Eli; Peña, Viviana; LeGall, Lene; Angles d'Auriac, Marc; Hall-Spencer, Jason M. & Robert S, Steneck [Show all 12 contributors for this article] (2019). De allestedsnærværende kalkalgene - et svært, rosa kunnskapshull langs norskekysten?
  • Bekkby, Trine; Andersen, Guri Sogn; Angeltveit, Gro; Broch, Ole Jacob; Bøe, Reidulv & Christie, Hartvig C [Show all 21 contributors for this article] (2019). Added values from the large-scale and long-lasting program for mapping marine habitats.
  • Torp, ØH; Fagerli, Camilla With; Fredriksen, Stein; Hancke, Kasper & Norderhaug, Kjell Magnus (2018). Factors affecting Saccharina latissima, concerning growth, recruitment and competition.
  • Rinde, Eli; Angles d'Auriac, Marc; Bekkby, Trine; Christie, Hartvig C; Fredriksen, Stein & Gitmark, Janne Kim [Show all 12 contributors for this article] (2018). Norways hidden marine biodiversity: the hunt for cryptic species within the coralline algae.
  • 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 .
  • Bartsch, Inka; Paar, Martin; Fredriksen, Stein; Hop, Haakon; Asmus, Ragnhild & Asmus, Harald [Show all 9 contributors for this article] (2017). Arctic warming affects kelp forest with associated fauna in Kongsfjorden, Svalbard.
  • 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), p. 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 .
  • Fredriksen, Stein; Moy, Frithjof Emil; Husa, Vivian; Sjøtun, Kjersti & Schneider, Susanne Claudia (2015). Alger Cyanophyta, Rhodophyta, Chlorophyta, Ochrophyta. In Henriksen, Snorre & Hilmo, Olga (Ed.), Norsk rødliste for arter 2015. Versjon 1.2. Artsdatabanken. ISSN 978-82-92838-41-9.
  • Evankow, Ann; Fredriksen, Stein; Christie, Hartvig C; Junge, Claudia & Brysting, Anne Krag (2015). Genetic tools reveal diversity and structure of kelp forests in Norway.
  • Bøe, Mari; Fredriksen, Stein & Karlsen, Hans Erik (2015). Seasonal variations of fish fauna in two Zostera marina meadows in the inner Oslofjord.
  • 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.
  • Bischof, Kai; Bartsch, Inka; Zachler, Katharina; Fredriksen, Stein & Wiencke, Christian (2015). Seaweed Biology in a changing Arctic.
  • Norderhaug, K.M.; Fagerli, Camilla; Andersen, Guri Sogn; Christie, H.; Moy, Frithjof Emil & Gundersen, Hege [Show all 11 contributors for this article] (2015). Regime shifts in Norwegian kelp forests .
  • Christie, H.; Norderhaug, K.M.; Fredriksen, Stein & Kraufvelin, Patrik (2015). How can kelp and seagrass beds persist being both food and habitat?
  • Andersen, A; Thormar, Jonas; Norderhaug, KM & Fredriksen, Stein (2013). Benthic communities at the opera in Bjørvika.
  • Fredriksen, Stein & Wiencke, Christian (2013). RIGHT OR WRONG CONCLUSION? THE IMPORTANCE OF EQUAL PRECISIONS LEVEL IN BIODIVERSITY STUDIES.
  • Brubak, Sissel Irene; Eikrem, Wenche; Fredriksen, Stein & Edvardsen, Bente (2013). Algal culture collection at the University of Oslo.
  • Norderhaug, Kjell Magnus; Fagerli, Camilla With; Moy, Frithjof Emil; Bekkby, Trine; Andersen, Guri Sogn & Gundersen, Hege [Show all 10 contributors for this article] (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 [Show all 9 contributors for this article] (2013). Climate Change and Large Scale shifts in the Geographical Distribution of NE Atlantic Kelp Forests.
  • Fredriksen, Stein (2012). Bentosalgevegetasjonen på Svalbard.
  • 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.
  • Pedersen, M.F.; Nejrup, L.B.; Pedersen, T.M. & Fredriksen, Stein (2012). Biomass & productivity of epiphytic algae on kelp Laminaria hyperborea.
  • 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 [Show all 7 contributors for this article] (2012). Ingen regional overgjødsling på Vestlandet. Havforskningsrapporten.
  • 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 & 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 (2010). Biodiversitet i tareskog.
  • Sjøtun, Kjersti; Fredriksen, Stein; Heggøy, Erling; Husa, Vivian; Langangen, Anders Vidar & Lindstrøm, Eli-Anne [Show all 9 contributors for this article] (2010). Alger: Cyanophyta, rhodophyta, chlorophyta, ochrophyta, Norsk rødliste for arter 2010. The 2010 Norwegian Red List for Species. Artsdatabanken. ISSN 978-82-92838-26-6. p. 79–86.
  • Steinhovden, Kristine & Fredriksen, Stein (2009). Temperaturtoleranser hos forskjellige isolater av sukkertare.
  • S. Forsberg, Ida; Rustad, Ida & Fredriksen, Stein (2009). Manipuleringer i fjæra i indre Oslofjord.
  • Fredriksen, Stein (2009). Stortare fra A til Å.
  • 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. p. 13–15.
  • Fredriksen, Stein (2008). Tang og tare i Nord.
  • Heiaas, Harald; Thomas, Kevin; Fredriksen, Stein & Ketil, Hylland (2008). Overvåking av fotosyntetisk effektivitet i makroalger.
  • Fredriksen, Stein (2007). Alger som nyttevekster. Sopp og nyttevekster. ISSN 1504-4165. 3(4), p. 10–13.
  • Sogn Andersen, Guri & Fredriksen, Stein (2007). Kelp associated epiphytes, their biomass production and community structure in relation to wave exposure and season.
  • Sogn Andersen, Guri & Fredriksen, Stein (2006). Kelp associated epiphytes and their level of biomass production in relation to wave-exposure and season.
  • Bekkby, Trine; Gabrielsen, June Helen; Rinde, Eli & Fredriksen, Stein (2021). Japansk spøkelseskreps og andre fremmede arter i Oslofjorden. NIVA.
  • Norderhaug, Kjell Magnus; Hansen, Pia Kupka; Fredriksen, Stein; Grøsvik, Bjørn Einar; Naustvoll, Lars Johan & Steen, Henning [Show all 7 contributors for this article] (2021). Miljøpåvirkning fra dyrking av makroalger — Risikovurdering for norske farvann. Havforskningsinstituttet. ISSN 1893-4536. Full text in Research Archive
  • 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 . Universitetet i Oslo.
  • 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. Universitetet i Oslo.
  • 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. Universitetet i Oslo.
  • Gundersen, Hege; Bekkby, Trine; Oug, Eivind; Norderhaug, Kjell Magnus; Fredriksen, Stein & Rinde, Eli (2018). Marin gruntvann. Norsk rødliste for naturtyper 2018. Artsdatabanken.
  • Fredriksen, Stein & Sjøtun, Kjersti (2015). Risikovurdering ved utseting av ikke-stedegen tare. Miljødirektoratet.
  • Fredriksen, Stein; Skjoldal, HR; Husa, Vivian; Olsen, Yngvar; Christie, Hartvig C & Dale, Trine [Show all 7 contributors for this article] (2011). Vurdering av eutrofisituasjonen i kystområder, med særlig fokus på Hardangerfjorden og Boknafjorden. Fiskeri- og kystdepartementet (FKD).
  • Christie, H.; Fredriksen, Stein; Magnusson, J. & Rueness, J. (2006). Marinbiologiske forbedringer av miljøet i Bjørvika/Bispervika. Vurderinger av muligheter. NIVA. ISSN 82-577-4960-5.

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Published Nov. 3, 2010 3:26 PM - Last modified Apr. 15, 2021 12:34 PM

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