Kjell Magnus Norderhaug

Image of Kjell Magnus Norderhaug
Norwegian version of this page
Phone +47-22854529
Mobile phone +47-41440922
Room 4407
Visiting address Blindernveien 31 None 0371 OSLO
Postal address Postboks 1066 Blindern 0316 OSLO

Academic Interests

My main field of interest is hard bottom fauna, and particularely kelp forest ecology and sea urchin grazing. I am also involved in national environmental monitoring and ecosystem changes in relation to eutrophication and climatic change. 


Higher education and employment history

Academic employments

2011-p.t.: Research Professor Norwegian Institute for Water Research, NIVA (80%)

2011-p.t.: Associate Professor, UiO (20%)

2003-2011: Research Scientist, Norwegian Institute for Water Research, NIVA



2003: Dr. scient in biology, UiO

1998: Cand. scient. in biology, UiO



  • 2010-2013 Member of NIVA board (elected by the employees)
  • 2007-2010 Member of ICES WG Marine habitat mapping
  • 2011-p.t. Member OSPAR ICG Common Procedure


Through my work at UiO and NIVA I cooperate with a number of national and international research institutions, e.g. Institute for Marine Research, Akvaplan NIVA, Aquabiota (Swe), Univsersity of Roskilde (Den), University of Maine (USA)

Tags: Marine biology, Ecology, Kelp forest ecology, Biodiversity, Biology


Invited Review

2009 Norderhaug KM, Christie H. Sea urchin grazing and kelp re-vegetation in the NE Atlantic. Mar Biol Res 5:515-528.


Selected publications Peer Review Journals

2012 Norderhaug KM, Christie H, Andersen GS, Bekkby T. Does the diversity of kelp forest fauna increase with wave exposure? J Sea Res 69:36-42.

2011 Norderhaug KM, Christie H. Kelp forest secondary production and variation according to wave exposure. Est Coast Shelf Sci 95:135-144.

2007 Norderhaug KM, Christie H, Fredriksen S. Is habitat size an important factor for faunal abundances on kelp (Laminaria hyperborea)? J Sea Res. 58:120-124.

2006 Norderhaug KM, Nygaard K, Fredriksen S. Importance of phlorotannin content and C:N ratio of Laminaria hyberborea in determining its palatability as food for consumers. Mar Biol Res 2: 367-371

2005 Norderhaug KM, Christie H, Fosså JH, Fredriksen S. Fish-macrofauna interactions in a kelp (Laminaria hyperborea) forest. J Mar Biol Ass UK. 85:1279-1286.

2004 Norderhaug KM. Use of red algae as hosts by kelp-associated amphipods. Mar Biol, 144:225-230.

2003 Norderhaug KM, Fredriksen S, Nygaard K. The trophic importance of Laminaria hyperborea to kelp forest consumers and the importance of bacterial degradation for food quality. Mar Ecol Prog Ser 255: 135-144

2002 Norderhaug KM, Christie H, Rinde E. Colonisation of kelp imitations by epiphyte and holdfast fauna; a study of mobility patterns. Mar Biol 141:965-973

  • Filbee-Dexter, Karen; Wernberg, Thomas; Norderhaug, Kjell Magnus; Ramirez-Llodra, Eva & Pedersen, Morten Foldager (2018). Movement of pulsed resource subsidies from kelp forests to deep fjords. Oecologia.  ISSN 0029-8549.  187(1), s 291- 304 . doi: 10.1007/s00442-018-4121-7
  • Nyhagen, Fredrik Oulie; Christie, Hartvig C & Norderhaug, Kjell Magnus (2018). Will altered climate affect a discrete population of the sea urchin Strongylocentrotus droebachiensis?. Journal of Sea Research.  ISSN 1385-1101.  132, s 24- 34 . doi: 10.1016/j.seares.2017.12.001
  • Christie, Hartvig & Norderhaug, Kjell Magnus (2016). Secondary production, In Emil Olafsson (ed.),  Marine Macrophytes as Foundation Species.  CRC Press.  ISBN 9781315370781.  Kapittel 7.  s 161 - 176
  • 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

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  • Hansen, Pia Kupka; Husa, Vivian; Bannister, Raymond; Kutti, Tina; Norderhaug, Kjell Magnus; Naustvoll, Lars Johan & Jakobsen, Henrik Rye (2017). Vurdering av egnethet av utslippsindikator for næringssalter og organisk materiale på produksjonsområdenivå. Rapport fra havforskningen. Nr. 23 - 2017. Full text in Research Archive.
  • Thormar, Jonas; Steen, Henning; van Son, Thijs Christiaan; Bosgraaf, Sebastian; Christensen, Lene; Mellerud, Ida Kristin; Moy, Frithjof Emil & Norderhaug, Kjell Magnus (2017). Fish Assemblages in Coastal Vegetation.
  • Bekkby, Trine; Rinde, Eli; Norderhaug, Kjell Magnus; Fagerli, Camilla With; Angeltveit, Gro; Gitmark, Janne Kim; Gundersen, Hege; Tveiten, Lise Ann & Christie, Hartvig C (2016). Interactive dynamics between abiotic factors, sea urchins and kelp forests.
  • 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
  • Gitmark, Janne Kim; Norderhaug, Kjell Magnus; Rinde, Eli; Gundersen, Hege; Christie, Hartvig C & Bekkby, Trine (2016). Effect of wave exposure and current speed on kelp morphology and the associated fauna communities.
  • Gundersen, Hege; Norderhaug, Kjell Magnus & Borchgrevink, Harald Bonaventura (2016, 08. mars). Overgjødsling og varmere vann kan bety trøbbel i Skagerrak. [Internett].  forskning.no.

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Published Mar. 22, 2012 1:39 PM


  • 2000-2003 Carbon transport in the kelp forest ecosystem
  • 2004-2006 National programme for mapping of marine biodiversity
  • 2005-2007 KELPPRO Variation in the kelp forest secondary production
  • 2006-2009 DYNAMOD Modelling of marine habitats
  • 2007 TAKL Sea urchin grazing and climatic change
  • 2008-2013 RESTORE Habitat restauration in areas grazed by sea urchins
  • 2008-p.t. The Coastal Monitoring Programme
  • 2009-2010 NiN New classification of Norwgian marine nature types
  • 2009-p.t. The Sugar Kelp Monitoring Programme
  • 2011-2012 POVER Publication of monitoring data
  • 2011-2012 REDMAR Red list for marine nature types
  • 2012 GENVAR Genetic variability in sea urchin populations
  • 2012 HAVVIND Assessment of areas for offshore wind mill parks
  • Kelp export: fuel for adjacent communities in changing arctic ecosystems? (KelpEx)