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 Tørum; 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
  • Hessen, Dag Olav; Andersen, Tom; Tominaga, Koji & Finstad, Anders Gravbrøt (2017). When soft waters becomes softer; drivers of critically low levels of Ca in Norwegian lakes. Limnology and Oceanography.  ISSN 0024-3590.  62(1), s 289- 298 . doi: 10.1002/lno.10394 Full text in Research Archive.
  • Hessen, Dag Olav; Hafslund, Ola Tobias; Andersen, Tom; Broch, Catharina; Shala, Nita Kaupang & Wojewodzic, Marcin (2017). Changes in stoichiometry, cellular RNA, and alkaline phosphatase activity of chlamydomonas in response to temperature and nutrients. Frontiers in Microbiology.  ISSN 1664-302X.  8(18), s 1- 8 . doi: 10.3389/fmicb.2017.00018
  • Hessen, Dag Olav; Håll, Johnny Peter; Thrane, Jan-Erik & Andersen, Tom (2017). Coupling dissolved organic carbon, CO2 and productivity in boreal lakes. Freshwater Biology.  ISSN 0046-5070.  62(5), s 945- 953 . doi: 10.1111/fwb.12914
  • Hessen, Dag Olav; Tombre, Ingunn; van Geest, Gerben & Alfsnes, Kristian (2017). Global change and ecosystem connectivity: how geese link fields of central Europe to eutrophication of Arctic freshwaters. Ambio.  ISSN 0044-7447.  46(1), s 40- 47 . doi: 10.1007/s13280-016-0802-9 Full text in Research Archive. Show summary
  • Neiman, Maurine; Beaton, Margaret J.; Hessen, Dag Olav; Jeyasingh, Punidan D. & Weider, Lawrence J. (2017). Endopolyploidy as a potential driver of animal ecology and evolution. Biological Reviews.  ISSN 1464-7931.  92(1), s 234- 247 . doi: 10.1111/brv.12226 Full text in Research Archive.
  • Skau, Lars Fredrik; Andersen, Tom; Thrane, Jan-Erik & Hessen, Dag Olav (2017). Growth, stoichiometry and cell size; temperature and nutrient responses in haptophytes. PeerJ.  ISSN 2167-8359.  5 . doi: 10.7717/peerj.3743 Full text in Research Archive.
  • Spears, Bryan; Futter, Martyn N.; Jeppesen, Erik; Huser, Brian J; Ives, Stephen; Davidson, Thomas A; Adrian, Rita; Angeler, David G.; Burthe, Sarah J; Carvalho, Laurence; Daunt, Francis; Gsell, Alena S; Hessen, Dag Olav; Janssen, Annette B G; MacKay, Eleanor B; May, Linda; Moorhouse, Heather; Olsen, Saara; Søndergaard, Martin; Woods, Helen & Thackeray, Stephen J. (2017). Ecological resilience in lakes and the conjunction fallacy. Nature Ecology and Evolution.  ISSN 2397-334X.  1(11), s 1616- 1624 . doi: 10.1038/s41559-017-0333-1 Full text in Research Archive.
  • Thrane, Jan-Erik; Hessen, Dag Olav & Andersen, Tom (2017). Plasticity in algal stoichiometry: Experimental evidence of a temperature-induced shift in optimal supply N:P ratio. Limnology and Oceanography.  ISSN 0024-3590.  62(4), s 1346- 1354 . doi: 10.1002/lno.10500
  • Wolf, Raoul; Andersen, Tom; Hessen, Dag Olav & Hylland, Ketil (2017). The influence of dissolved organic carbon and ultraviolet radiation on the genomic integrity of Daphnia magna. Functional Ecology.  ISSN 0269-8463.  31(4), s 848- 855 . doi: 10.1111/1365-2435.12730 Full text in Research Archive.
  • Adrian, Rita & Hessen, Dag Olav (2016). Environmental Impacts—Lake Ecosystems, In Markus Quante & Franciscus Colijn (ed.),  North Sea Region Climate Change Assessment.  Springer Publishing Company.  ISBN 978-3-319-39743-6.  Kapittel 10.  s 315 - 340
  • Alfsnes, Kristian; Hobæk, Anders; Weider, Lawrence J. & Hessen, Dag O. (2016). Birds, nutrients, and climate change: mtDNA haplotype diversity of Arctic Daphnia on Svalbard revisited. Polar Biology.  ISSN 0722-4060.  39(8), s 1425- 1437 . doi: 10.1007/s00300-015-1868-8
  • de Wit, Heleen A.; Valinia, Salar; Weyhenmeyer, Gesa A; Futter, Martyn N.; Kortelainen, Pirkko; Austnes, Kari; Hessen, Dag O; Raike, Antti; Laudon, Hjalmar & Vournenmaa, Jussi (2016). Current Browning of Surface Waters Will Be Further Promoted by Wetter Climate. Environmental Science and Technology Letters.  ISSN 2328-8930.  3(12), s 430- 435 . doi: 10.1021/acs.estlett.6b00396 Full text in Research Archive.
  • Finstad, Anders Gravbrøt; Andersen, Tom; Larsen, Søren; Tominaga, Koji; Blumentrath, Stefan; de Wit, Heleen A.; Tømmervik, Hans & Hessen, Dag Olav (2016). From greening to browning: Catchment vegetation development and reduced S-deposition promote organic carbon load on decadal time scales in Nordic lakes. Scientific Reports.  ISSN 2045-2322.  6 . doi: 10.1038/srep31944 Full text in Research Archive. Show summary
  • Hanevik, Hans Ivar; Hessen, Dag Olav; Sunde, Arne & Breivik, Jarle (2016). Can IVF influence human evolution?. Human Reproduction.  ISSN 0268-1161.  31(7), s 1397- 1402 . doi: 10.1093/humrep/dew089
  • Hessen, Dag Olav (2016). Seleksjon ved konsekvenser – og konsekvensene av seleksjon. Norsk Tidsskrift for Atferdsanalyse.  ISSN 0809-781X.  43, s 51- 55
  • Leinaas, Hans Petter; Jalal, Marwa; Gabrielsen, Tove M. & Hessen, Dag Olav (2016). Inter- and intraspecific variation in body- and genome size in calanoid copepods from temperate and arctic waters. Ecology and Evolution.  ISSN 2045-7758.  6(16), s 5585- 5595 . doi: 10.1002/ece3.2302 Full text in Research Archive.
  • Lindholm, Markus; Wolf, Raoul; Finstad, Anders & Hessen, Dag O (2016). Water browning mediates predatory decimation of the Arctic fairy shrimp Branchinecta paludosa. Freshwater Biology.  ISSN 0046-5070.  61(3), s 340- 347 . doi: 10.1111/fwb.12712
  • Thrane, Jan-Erik; Hessen, Dag Olav & Andersen, Tom (2016). The impact of irradiance on optimal and cellular nitrogen to phosphorus ratios in phytoplankton. Ecology Letters.  ISSN 1461-023X.  19(8), s 880- 888 . doi: 10.1111/ele.12623
  • Feng, Jianfeng; Durant, Joel Marcel; Stige, Leif Christian; Hessen, Dag Olav; Hjermann, Dag Øystein; Zhu, Lin; Llope, Marcos & Stenseth, Nils Christian (2015). Contrasting correlation patterns between environmental factors and chlorophyll levels in the global ocean. Global Biogeochemical Cycles.  ISSN 0886-6236.  29(12), s 2095- 2107 . doi: 10.1002/2015GB005216
  • Hessen, Dag Olav (2015). Noncoding DNA as a Phenotypic Driver. Evolutionary biology.  ISSN 0071-3260.  42, s 427- 431 . doi: 10.1007/s11692-015-9335-6
  • Jalal, Marwa; Andersen, Tom & Hessen, Dag Olav (2015). Temperature and developmental responses of body and cell size in Drosophila; effects of polyploidy and genome configuration. Journal of Thermal Biology.  ISSN 0306-4565.  51, s 1- 14 . doi: 10.1016/j.jtherbio.2015.02.011
  • Jeyansingh, Pinidian; Chowdhury, Priyanka; Wojewodzic, Marcin; Frisch, Dagmar; Hessen, Dag Olav & Weider, Lawrence J. (2015). Phosphorus use and excretion varies with ploidy level in Daphnia. Journal of Plankton Research.  ISSN 0142-7873.  37, s 1210- 1217 . doi: 10.1093/plankt/fbv095
  • Lindholm, Markus; Hessen, Dag Olav; Færøvig, Per-Johan; Rognerud, Bjørg; Andersen, Tom & Stordal, Frode (2015). Is distribution of cold stenotherms constrained by temperature? The case of the Arctic fairy shrimp (Branchinecta paludosa O.F. Müller 1788). Journal of Thermal Biology.  ISSN 0306-4565.  53, s 46- 52 . doi: 10.1016/j.jtherbio.2015.08.005
  • Walseng, Bjørn; Andersen, Tom & Hessen, Dag Olav (2015). Higher zooplankton species richness associated with an invertebrate top predator. Freshwater Biology.  ISSN 0046-5070.  60(5), s 903- 910 . doi: 10.1111/fwb.12543 Show summary
  • Yang, Hong; Andersen, Tom; Dörsch, Peter; Tominaga, Koji; Thrane, Jan-Erik & Hessen, Dag Olav (2015). Greenhouse gas metabolism in Nordic boreal lakes. Biogeochemistry.  ISSN 0168-2563.  126(1-2), s 211- 225 . doi: 10.1007/s10533-015-0154-8 Full text in Research Archive. Show summary
  • Feng, Jianfeng; Stige, Leif Christian; Durant, Joel Marcel; Hessen, Dag Olav; Zhu, Lin; Hjermann, Dag Øystein; Llope, Marcos & Stenseth, Nils Christian (2014). Large-scale season-dependent effects of temperature and zooplankton on phytoplankton in the North Atlantic. Marine Ecology Progress Series.  ISSN 0171-8630.  502, s 25- 37 . doi: 10.3354/meps10724
  • Finstad, Anders Gravbrøt; Helland, Ingeborg Palm; Ugedal, Ola; Hesthagen, Trygve H. & Hessen, Dag Olav (2014). Unimodal response of fish yield to dissolved organic carbon. Ecology Letters.  ISSN 1461-023X.  17(1), s 36- 43 . doi: 10.1111/ele.12201 Full text in Research Archive.
  • Frigstad, Helene; Andersen, Tom; Bellerby, Richard; Silyakova, Anna & Hessen, Dag Olav (2014). Variation in the seston C:N ratio of the Arctic Ocean and pan-Arctic shelves. Journal of Marine Systems.  ISSN 0924-7963.  129, s 214- 223 . doi: 10.1016/j.jmarsys.2013.06.004
  • Hessen, Dag Olav & Kaartvedt, Stein (2014). Top-down cascades in lakes and oceans: Different perspectives but same story?. Journal of Plankton Research.  ISSN 0142-7873.  36(4), s 914- 924 . doi: 10.1093/plankt/fbu040
  • Jalal, Marwa; Shala, Nita Kaupang; Wojewodzic, Marcin; Andersen, Tom; Hessen, Dag Olav & Schwarzacher, T (2014). Multigenerational genomic responses to dietary phosphorus and temperature in Daphnia. Genome.  ISSN 0831-2796.  57(8), s 439- 448 . doi: 10.1139/gen-2014-0047
  • Reusch, Marianne & Hessen, Dag Olav (2014). Friluftslivets høstingsrett – I biologisk og juridisk perspektiv. Nordisk miljörättslig tidskrift.  ISSN 2000-4273.  2013(2), s 67- 84
  • Skurdal, Jostein; Johnsen, Stein Ivar; Garnås, Erik; Hessen, Dag Olav & Qvenild, Tore (2014). Hva har vi lært etter 35 års overvåking av ferskvannskreps i Steinsfjorden?. Vann.  ISSN 0042-2592.  (1), s 6- 16
  • Thrane, Jan-Erik; Hessen, Dag Olav & Andersen, Tom (2014). The Absorption of Light in Lakes: Negative Impact of Dissolved Organic Carbon on Primary Productivity. Ecosystems.  ISSN 1432-9840.  17(6), s 1040- 1052 . doi: 10.1007/s10021-014-9776-2
  • Wilson, David S. & Hessen, Dag Olav (2014). Blueprint for the Global Village. Cliodynamics.  ISSN 2373-7530.  5, s 123- 157
  • Anderson, Thomas R.; Hessen, Dag Olav; Mitra, Aditee; Mayor, Daniel J. & Yool, Andrew (2013). Sensitivity of secondary production and export flux to choice of trophic transfer formulation in marine ecosystem models. Journal of Marine Systems.  ISSN 0924-7963.  125, s 41- 53 . doi: 10.1016/j.jmarsys.2012.09.008
  • Aubert, Anais; Svensen, Camilla; Hessen, Dag Olav & Tamelander, Tobias (2013). CNP stoichiometry of a lipid-synthesising zooplankton, Calanus finmarchicus, from winter to spring bloom in a sub-Arctic sound. Journal of Marine Systems.  ISSN 0924-7963.  111, s 19- 28 . doi: 10.1016/j.jmarsys.2012.09.004
  • Frigstad, Helene; Andersen, Tom; Hessen, Dag Olav; Jeansson, Emil; Skogen, Morten D.; Naustvoll, Lars Johan; Miles, Martin W.; Johannessen, Truls & Bellerby, Richard (2013). Long-term trends in carbon, nutrients and stoichiometry in Norwegian coastal waters: Evidence of a regime shift. Progress in Oceanography.  ISSN 0079-6611.  111, s 113- 124 . doi: 10.1016/j.pocean.2013.01.006 Show summary
  • Hessen, Dag Olav (2013). Inorganic Nitrogen Deposition and Its Impacts on N:P-Ratios and Lake Productivity. Water.  ISSN 2073-4441.  5(2), s 327- 341 . doi: 10.3390/w5020327
  • Hessen, Dag Olav; Daufresne, Martin & Leinaas, Hans Petter (2013). Temperature-size relations from the cellular-genomic perspective. Biological Reviews.  ISSN 1464-7931.  88(2), s 476- 489 . doi: 10.1111/brv.12006
  • Hessen, Dag Olav; Elser, James J.; Sterner, Robert W. & Urabe, Jotaro (2013). Ecological stoichiometry: An elementary approach using basic principles. Limnology and Oceanography.  ISSN 0024-3590.  58(6), s 2219- 2236 . doi: 10.4319/lo.2013.58.6.2219
  • Jalal, Marwa; Wojewodzic, Marcin; Laane, Carl Morten Motzfeldt & Hessen, Dag Olav (2013). Large Daphnia at lower temperature: a role for cell size and genome configuration?. Genome.  ISSN 0831-2796.  56, s 511- 519 . doi: 10.1139/gen-2013-0004
  • Kelly, Noreen E.; Yan, Norman D.; Walseng, Bjørn & Hessen, Dag Olav (2013). Differential short- and long-term effects of an invertebrate predator on zooplankton communities in invaded and native lakes. Diversity and Distributions: A journal of biological invasions and biodiversity.  ISSN 1366-9516.  19(4), s 396- 410 . doi: 10.1111/j.1472-4642.2012.00946.x Show summary
  • Moe, Therese Fosholt; Brysting, Anne Krag; Andersen, Tom; Schneider, Susanne Claudia; Kaste, Øyvind & Hessen, Dag Olav (2013). Nuisance growth of Juncus bulbosus: the roles of genetics and environmental drivers tested in a large-scale survey. Freshwater Biology.  ISSN 0046-5070.  58(1), s 114- 127 . doi: 10.1111/fwb.12043 Full text in Research Archive.
  • Schneider, Susanne Claudia; Moe, Therese Fosholt; Hessen, Dag Olav & Kaste, Øyvind (2013). Juncus bulbosus nuisance growth in oligotrophic freshwater ecosystems: Different triggers for the same phenomenon in rivers and lakes?. Aquatic Botany.  ISSN 0304-3770.  104, s 15- 24 . doi: 10.1016/j.aquabot.2012.10.001 Full text in Research Archive.

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  • 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.
  • Weslawski, Jan Marcin & Hessen, Dag Olav (2017). Size: Why are some animals small and other large?. Polish Institute of Oceanography.  ISBN 978-83-949491-0-5.  25 s.
  • Hessen, Dag Olav (2016). Landskap i endring. Pax Forlag.  ISBN 978-82-530-3899-5.  159 s.
  • Hessen, Dag Olav (2015). C. Karbon - en uautorisert biografi. Cappelen Damm AS.  ISBN 978-82-02-45867-6.  260 s.
  • Hessen, Dag Olav (2015). Livet fra A til Å - en bok om deg. Cappelen Damm AS.  ISBN 978-82-02-47688-5.  91 s.
  • Hessen, Dag Olav; Lie, Thore & Stenseth, Nils Christian (red.) (2015). Mendels arv - Genetikkens æra. Gyldendal Norsk Forlag A/S.  ISBN 978-82-05-45818-5.  440 s.
  • Kleiven, Helga Flesche; Hessen, Dag Olav; Svensen, Henrik; Samset, Bjørn Hallvard; Østli, Kjetil & Kristiansen, Nina (2014). Isfritt. Spartacus.  ISBN 9788243008342.  160 s.
  • Alfsen, Knut H.; Hessen, Dag Olav & Jansen, Eystein (2013). Klimaendringer i Norge. Universitetsforlaget.  ISBN 978-82-15-02158-4.  248 s.
  • Alfsen, Knut H.; Hessen, Dag Olav & Jansen, Eystein (2013). Klimaendringer i Norge - forskernes forklaringer. Universitetsforlaget.  ISBN 9788215021584.  256 s.

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  • Haugnes, Gunhild M.; Tallaksen, Lena M.; Vogt, Rolf David; Storelvmo, Trude; Hessen, Dag Olav; Stordal, Frode; Lefevre, Sjannie; Kääb, Andreas & Uggerud, Einar (2018, 27. august). Klimaforskerne tar temperaturen på tropesommeren. [Tidsskrift].  Titan.uio.no.
  • Hessen, Dag Olav; Stordal, Frode & Vogt, Rolf David (2018). Vi må forstå hvorfor to graders temperaturøkning er farlig. Aftenposten Viten.
  • Smedsrud, Morten Skipenes; Hessen, Dag Olav & Vogt, Rolf David (2018, 30. mai). Svekket livsgrunnlag for fossekall og røye. [Fagblad].  Apollon.
  • Hessen, Dag Olav (2017). Impact of Noncoding DNA on Phenotype Evolution. Encyclopedia of Life Sciences.  ISSN 1476-9506. . doi: 10.1002/9780470015902.a0027507
  • Jensen, Nina; Martinsen, Siri; Hessen, Dag Olav; Bøckman, Petter & Moen, Ole Martin (2017). Dyrene dør. Du lever som før?.
  • Jensen, Thomas Correll; Walseng, Bjørn; Christoffersen, Kirsten Seestern; Novichkova, Anna; Chertoprud, Elena S.; Chertoprud, Mikhail V.; Makarova, O. L.; Dimante-Deimantovica, Inta; Sakharova, E. G.; Krylov, A. V.; Frisch, Dagmar & Hessen, Dag Olav (2017). The impact of geese on aquatic biodiversity in the high Arctic.
  • Schultze, Sabrina; Poste, Amanda; Ruus, Anders; Hessen, Dag Olav; Andersen, Tom & Borgå, Katrine (2017). Do high levels of terrestrial DOM uptake lead to higher contaminant concentration and changes in energy allocation and growth? A study on three marine lower food web taxa.
  • Wolf, Raoul; Andersen, Tom; Hessen, Dag Olav & Hylland, Ketil (2017). From genetic damage to population effects: How interactions of dissolved organic carbon and ultraviolet radiation affect Daphnia magna.
  • Benestad, Esben Esther Pirell; Hessen, Dag Olav & Mühleisen, Wencke (2016). Til bunns i seksualiteten - en mailsamtale. Fanfare.  ISSN 1893-8698.  (7), s 14- 23
  • Bernhoft, Aksel; Albihn, Ann; Hessen, Dag Olav; Holmboe-Ottesen, Gerd; Keilman, Nico; Børresen, Trond; Haug, Ruth; Nicolaysen, Anna Marie & Andersen, Regine (2016). Hvordan skal vi sikre et landbruk som kan fø oss i framtiden?. Show summary
  • Eriksen, Thomas Hylland; Hessen, Dag Olav & Svensen, Henrik (2016). En røff guide til antropocen. Nytt Norsk Tidsskrift.  ISSN 0800-336X.  33(1-2), s 71- 83
  • Grinde, Bjørn; Wilson, David Sloan; Lieberman, Jerry; Hessen, Dag Olav; Gule, Lars; Lieberman, Gin Kohl; Moene, Kalle; Gowdy, John & Krall, Lisi (2016). The Norway Project: A deep look at its lessons to help us to improve Our society. Full text in Research Archive.
  • Hessen, Dag Olav (2016). Banch/Stim, I: Knut Stene-Johansen; Christian Refsum & Johan Henrik Schimanski (red.),  Å leve sammen. Roland Barthes, individet og fellesskapet.  Spartacus.  ISBN 978-82-304-01781.  Kapittel.
  • Svensen, Henrik; Eriksen, Thomas Hylland & Hessen, Dag Olav (2016). Menneskeheten er inne i en ny geologisk epoke - antropocen. Aftenposten (morgenutg. : trykt utg.).  ISSN 0804-3116.
  • Vogt, Rolf David; Gao, Pingchuan; Hessen, Dag Olav & Haaland, Ståle (2016). Effect of solar radiation on Dissolved Natural Organic Matter. Show summary
  • Edvardsen, Bente & Hessen, Dag Olav (2015). Genome size variation in microalgae”. Show summary
  • Hessen, Dag Olav (2015). Evolusjon, naturvitenskap og mening : tilsvar å Geir Gellemos artikkel i forrige nummer. Kirke og kultur.  ISSN 0023-186X.  120(4), s 340- 341
  • Wolf, Raoul; Andersen, Tom; Hessen, Dag Olav & Hylland, Ketil (2015). The influence of UVR and DOC on the genomic integrity of Daphnia magna.
  • Wolf, Raoul; Varga, Lilia; Andersen, Tom; Hessen, Dag Olav & Hylland, Ketil (2015). Effects of Environmental Stress on the Genomic Integrity of Daphnia magna STRAUS, 1820.
  • Bøckman, Petter; Hessen, Dag Olav & Sætre, Glenn-Peter (2014, 08. august). Homo futurus. [Tidsskrift].  Aftenposten Ammagasinet.
  • Hessen, Dag Olav (2014). Albedo - og et grønnere Artktis, I: Henrik Svensen (red.),  Isfritt. Populærvitenskap som angår deg.  Spartacus.  ISBN 9788243008342.  Kapittel.  s 93 - 95
  • Hessen, Dag Olav (2014). Den tause våren. Harvest : Mennesket & naturen.
  • Hessen, Dag Olav (2014). En utrydningstruet art?. Klassekampen.  ISSN 0805-3839.
  • Hessen, Dag Olav (2014). Fri vilje - biologisk umulig, men moralsk nødvendig?, I: Svein Harald Gullbekk (red.),  Ja, vi elsker frihet.  Dreyer Forlag A/S.  ISBN 978-82-8265-093-9.  Kapittel.  s 32 - 36
  • Hessen, Dag Olav (2014). Høyere, tettere, gråere. Aftenposten (morgenutg. : trykt utg.).  ISSN 0804-3116.
  • Hessen, Dag Olav (2014). Mer av alt. NRK - www.nrk.no.
  • Hessen, Dag Olav (2014). Motorferdsel og demogratiske fikenblad. VG : Verdens gang.  ISSN 0805-5203.
  • Hessen, Dag Olav (2014). Oljefondet som mulighet. Klassekampen.  ISSN 0805-3839.
  • Hessen, Dag Olav (2014). Oljefondets etikk; både råd og forvaltning. Dagens næringsliv.  ISSN 0803-9372.
  • Hessen, Dag Olav (2014). Oljefondets etiske mandat. Dagbladet.  ISSN 0805-3766.
  • Hessen, Dag Olav (2014). Pose og sekk-nasjonen. Klassekampen.  ISSN 0805-3839.
  • Hessen, Dag Olav (2014). På skattejakt i "søppel-DNA". Aftenposten (morgenutg. : trykt utg.).  ISSN 0804-3116.
  • Hessen, Dag Olav (2014). Verdien av det ubetalelige, I: Henrik Svensen (red.),  Isfritt. Populærvitenskap som angår deg.  Spartacus.  ISBN 9788243008342.  Kapittel.  s 64 - 65
  • Reusch, Marianne & Hessen, Dag Olav (2014). Kan forbud fremme frihet?. Dagbladet.  ISSN 0805-3766.
  • Svensen, Henrik & Hessen, Dag Olav (2014). Eksperimentet, I: Henrik Svensen (red.),  Isfritt. Populærvitenskap som angår deg.  Spartacus.  ISBN 9788243008342.  Forord.  s 9 - 11
  • Tønnessen, Morten; Tønnessen, Morten & Hessen, Dag Olav (2014, 12. november). – Et godt liv kan ikke realiseres i pelsdyrindustrien. [Fagblad].
  • Aall, Carlo; Grønås, Sigbjørn; Hessen, Dag Olav; Hjertager, Audun; Hylland-Eriksen, Thomas; Innbjør, Linda; Jakobsen, Ove D; Kroglund, Andrew P.; Kvåle, Gunnar; Fossgard Sandøy, Ingvild; Svae, Per Hjalmar & Vetlesen, Arne Johan (2013). Opprop for De Grønne. Klassekampen.  ISSN 0805-3839.
  • Hessen, Dag Olav (2013). Hva skal vi spise? : fortid som fasit : biologens kommentar. Tidsskrift for kulturforskning.  ISSN 1502-7473.  12(3-4), s 27- 29
  • Lie, Thore & Hessen, Dag Olav (2013). Ut av Darwins skygge. Alfred Russel Wallace. Biolog.  ISSN 0801-0722.  4, s 10- 16
  • Lier-Hansen, Stein; Vedeld, Pål; Armstong, Claire; Brekke, Kjell Arne; Clemetsen, Morten; Magnussen, Kristin; Hessen, Dag Olav; Nybø, Signe; Mäler, Karl-Göran; Aslaksen, Iulie; Schei, Peter Johan; Sørheim, Kristin; Bråten, Kristin Grønvik; Katerås, Finn & Sæther, Bent Arne (red.) (2013). Norges offentlige utredninger. Naturens goder - om verdier av økosystemtjenester. NOU - Norges offentlige utredninger. 2013-10.

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