Geir Johnsen

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Jørgen BergeUniversity of TromsøVerifisert e-postadresse på uit.no
Egil SakshaugProfessor emeritus Norwegian University of Science and TechnologyVerifisert e-postadresse på ntnu.no
Martin LudvigsenProfessor Department of Marine Technology NTNUVerifisert e-postadresse på ntnu.no
Mark MolineUniversity of DelawareVerifisert e-postadresse på udel.edu
Jonathan CohenUniversity of DelawareVerifisert e-postadresse på udel.edu
Finlo CottierScottish Association for Marine ScienceVerifisert e-postadresse på sams.ac.uk
Asgeir J. SørensenProfessor, Department of Marine Technology, NTNUVerifisert e-postadresse på ntnu.no
Kasper HanckeSenior Researcher in Marine Biology at Norwegian Institute for Water ResearchVerifisert e-postadresse på niva.no
Kim S. LastSenior Lecturer in Marine Biology and ChronobiologyVerifisert e-postadresse på sams.ac.uk
Malin DaaseVerifisert e-postadresse på uit.no
Eva LeuSenior scientist/ Akvaplan-nivaVerifisert e-postadresse på akvaplan.niva.no
Einar Skarstad Egeland (Dr Ing)Nord University, Bodø, NorwayVerifisert e-postadresse på nord.no
Øystein VarpeUniversity of BergenVerifisert e-postadresse på uib.no
Paul RenaudAkvaplan-niva; and University Centre in SvalbardVerifisert e-postadresse på akvaplan.niva.no
S Falk-PetersenAkvaplan-nivaVerifisert e-postadresse på akvaplan.niva.no
Tor Arne JohansenProfessor, Dept. Engineering Cybernetics, Norwegian University of Science and Technology, NorwayVerifisert e-postadresse på ntnu.no
Lasse M. OlsenUniversitetet i BergenVerifisert e-postadresse på uib.no
Maxime GeoffroyResearch Scientist at Marine Institute of Memorial University of NewfoundlandVerifisert e-postadresse på mi.mun.ca
Artur ZolichOslo Metropolitan University - OsloMetVerifisert e-postadresse på oslomet.no
Janne E. SøreideProfessor in Marine Biology at the University Centre in SvalbardVerifisert e-postadresse på unis.no

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Geir Johnsen

Professor in Marine Biology at NTNU & UNIS

Verifisert e-postadresse på ntnu.no

Marine biology environmental mapping and monitoring


Tittel Sorter etter sitater Sorter etter år Sorter etter tittel	Sitert av Sitert av	År
Phytoplankton pigments: characterization, chemotaxonomy and applications in oceanography S Roy, C Llewellyn, ES Egeland, G Johnsen Cambridge University Press, 2011	512	2011
Ocean temperature oscillations enable reappearance of blue mussels Mytilus edulis in Svalbard after a 1000 year absence J Berge, G Johnsen, F Nilsen, B Gulliksen, D Slagstad Marine Ecology Progress Series 303, 167-175, 2005	368	2005
Leads in Arctic pack ice enable early phytoplankton blooms below snow-covered sea ice P Assmy, M Fernández-Méndez, P Duarte, A Meyer, A Randelhoff, ... Scientific reports 7 (1), 40850, 2017	319	2017
Actinomycetes from sediments in the Trondheim fjord, Norway: diversity and biological activity H Bredholt, E Fjærvik, G Johnsen, SB Zotchev Marine drugs 6 (1), 12-24, 2008	304	2008
Detection of harmful algal blooms using photopigments and absorption signatures: A case study of the Florida red tide dinoflagellate, Gymnodinium breve DF Millie, OM Schofield, GJ Kirkpatrick, G Johnsen, PA Tester, BT Vinyard Limnology and oceanography 42 (5part2), 1240-1251, 1997	303	1997
An integrated analysis of molecular acclimation to high light in the marine diatom Phaeodactylum tricornutum M Nymark, KC Valle, T Brembu, K Hancke, P Winge, K Andresen, ... PloS one 4 (11), e7743, 2009	298	2009
Biooptical characteristics of PSII and PSI in 33 species (13 pigment groups) of marine phytoplankton, and the relevance for pulse‐amplitude‐modulated and fast‐repetition‐rate … G Johnsen, E Sakshaug Journal of Phycology 43 (6), 1236-1251, 2007	236	2007
In the dark: a review of ecosystem processes during the Arctic polar night J Berge, PE Renaud, G Darnis, F Cottier, K Last, TM Gabrielsen, ... Progress in Oceanography 139, 258-271, 2015	233	2015
Ecosystem Barents Sea E Sakshaug, GH Johnsen, KM Kovacs Tapir Academic Press, 2009	231	2009
Diel vertical migration of Arctic zooplankton during the polar night J Berge, F Cottier, KS Last, Ø Varpe, E Leu, J Søreide, K Eiane, ... Biology letters 5 (1), 69-72, 2009	228	2009
Unexpected levels of biological activity during the polar night offer new perspectives on a warming Arctic J Berge, M Daase, PE Renaud, WG Ambrose, G Darnis, KS Last, E Leu, ... Current Biology 25 (19), 2555-2561, 2015	205	2015
BIO‐OPTICAL CHARACTERISTICS AND PHOTOADAPTIVE RESPONSES IN THE TOXIC AND BLOOM‐FORMING DINOFLAGELLATES GYRODINIUM AUREOLUM, GYMNODINIUM GALATHEANUM, AND TWO STRAINS OF … G Johnsen, E Sakshaug Journal of Phycology 29 (5), 627-642, 1993	196	1993
In vivo absorption characteristics in 10 classes of bloom-forming phytoplankton: taconomic characteristics and responses to photoadaptation by means of discriminant and HPLC … G Johnsen, O Samset, L Granskog, E Sakshaug Marine Ecology Progress Series, 149-157, 1994	189	1994
Molecular and photosynthetic responses to prolonged darkness and subsequent acclimation to re-illumination in the diatom Phaeodactylum tricornutum M Nymark, KC Valle, K Hancke, P Winge, K Andresen, G Johnsen, ... PLoS one 8 (3), e58722, 2013	160	2013
Using absorbance and fluorescence spectra to discriminate microalgae DF Millie, OME Schofield, GJ Kirkpatrick, G Johnsen, TJ Evens European Journal of Phycology 37 (3), 313-322, 2002	155	2002
Pigments and photoacclimation processes. C Brunet, G Johnsen, J Lavaud, S & Roy Phytoplankton pigments: Updates on Characterization, Chemotaxonomy and …, 2011	151	2011
Modeling of light-dependent algal photosynthesis and growth: experiments with the Barents sea diatoms Thalassiosira nordenskioldii and Chaetoceros furcellatus E Sakshaug, G Johnsen, K Andresen, M Vernet Deep Sea Research Part A. Oceanographic Research Papers 38 (4), 415-430, 1991	130	1991
THE SIGNIFICANCE OF INTRACELLULAR SELF‐SHADING ON THE BIOOPTICAL PROPERTIES OF BROWN, RED, AND GREEN MACROALGAE1 J Grzymski, G Johnsen, E Sakshaug Journal of Phycology 33 (3), 408-414, 1997	127	1997
Photoacclimation in phytoplankton: implications for biomass estimates, pigment functionality and chemotaxonomy F Rodriguez, M Chauton, G Johnsen, K Andresen, LM Olsen, M Zapata Marine Biology 148, 963-971, 2006	120	2006
Applications of geo-referenced underwater photo mosaics in marine biology and archaeology M Ludvigsen, B Sortland, G Johnsen, H Singh Oceanography 20 (4), 140-149, 2007	118	2007

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