Dag Olav Hessen

Image of Dag Olav Hessen
Norwegian version of this page
Phone +47-22854553
Mobile phone 95037899
Visiting address Blindernveien 31 None 0371 OSLO
Postal address Postboks 1066 Blindern 0316 OSLO


Major interests are food web ecology and “ecological stoichiometry” in aquatic food-webs, but I have also papers and ongoing projects on genetic structure of arctic crustaceans as well as studies of the cellular evolution and regulation of growth rate via rDNA and RNA in various organisms. I have also ongoing studies on climatic effects on element cycling and biota in catchments as well as the biological effects of UV-radiation, but my core research for the past ten years has been on the reciprocal regulation of the key elements carbon, nitrogen and phosphorus. This research is done in concert with is an international team, where all aspects from cellular regulation of growth rate and thus the cellular fate of carbon, via experiments and models on food web efficiency in terms of carbon transfer up to global scaling of biotic C-fluxes.

Tags: Norwegian centres of excellence, Food web dynamics, Evolutionary Ecology, Climate effects, Biogeochemistry, Biology, Evolutionary biology, Limnology, Biodiversity, Polyploidy, climate change ecology, Ecophysiology, Stoichiometry, Pelagic ecology, Zooplankton, Genomics, Ecology


  • Lindholm, Markus; Eie, Martin Espedal; Hessen, Dag Olav; Johansen, Joachim Tørud; Weiby, Kristoffer & Thaulow, Jens (2018). Effects of water browning on freshwater biodiversity: the case of the predatory phantom midge Chaoborus nyblaei. Hydrobiologia.  ISSN 0018-8158.  813(1), s 33- 40 . doi: 10.1007/s10750-017-3503-x
  • Walseng, Bjørn; Jensen, Thomas Correll; Dimante-Deimantovica, Inta; Christoffersen, Kirsten Seestern; Chertoprud, Mikhail; Chertoprud, Elena; Novichkova, Anna & Hessen, Dag Olav (2018). Freshwater diversity in Svalbard: providing baseline data for ecosystems in change. Polar Biology.  ISSN 0722-4060.  s 1- 11 . doi: 10.1007/s00300-018-2340-3
  • Wolf, Raoul; Thrane, Jan-Erik; Hessen, Dag Olav & Andersen, Tom (2018). Modelling ROS formation in boreal lakes from interactions between dissolved organic matter and absorbed solar photon flux. Water Research.  ISSN 0043-1354.  132, s 331- 339 . doi: 10.1016/j.watres.2018.01.025 Full text in Research Archive.
  • Alfsnes, Kristian; Leinaas, Hans Petter & Hessen, Dag Olav (2017). Genome size in arthropods; different roles of phylogeny, habitat and life history in insects and crustaceans. Ecology and Evolution.  ISSN 2045-7758.  7(15), s 5939- 5947 . doi: 10.1002/ece3.3163 Full text in Research Archive.
  • Anderson, Thomas R.; Hessen, Dag Olav; Boersma, Maarten; Urabe, Jotaro & Mayor, Daniel J. (2017). Will invertebrates require increasingly carbon-rich food in a warming world?. American Naturalist.  ISSN 0003-0147.  190(6), s 725- 742 . doi: 10.1086/694122
  • Guignard, Maïté S.; Leitch, Andrew R.; Aquisti, Claudia; Eitzaguirre, Christophe; Elser, James J.; Hessen, Dag Olav; Jeyasingh, Punidan D.; Neiman, Maurine; Richardson, Alan E.; Soltis, Pamela S.; Soltis, Douglas E.; Stevens, Carly J.; Trimmer, Mark; Weider, Lawrence J.; Woodward, Guy & Leitch, Ilia J. (2017). Impacts of nitrogen and phosphorus: From genomes to natural ecosystems and agriculture. Frontiers in Ecology and Evolution.  ISSN 2296-701X.  5, s 1- 9 . doi: 10.3389/fevo.2017.00070

View all works in Cristin

  • Hessen, Dag Olav (2017). The many lives of carbon. Reaktion Books.  ISBN 9781780238517.  272 s.
  • Hessen, Dag Olav (2017). Vi. Samarbeid fra celle til samfunn. Cappelen Damm AS.  ISBN 978-82-02-52606-1.  262 s.

View all works in Cristin

View all works in Cristin

Published May 26, 2011 9:46 PM - Last modified May 24, 2013 12:29 PM