Bakgrunn og aktiviteter
Geir Johnsen is a professor in marine biology at the Department of Biology (NTNU at Trondhjem biological station, TBS), Prof II at University Centre on Svalbard (UNIS), and is one of the founding partners in a NTNU spin-off company Ecotone using new optical techniques for mapping and monitoring the marine environment. He is a key scientist in the Centre of excellence (CeO) "Autonomous Marine Operations and Systems (AMOS) using enabling technology for marine ecological studies.
He has been at 1 years research stays at University of California at Santa Barbara (1992-93) , Curtin University, Perth, Australia (2010-11) and University of Hawaii at Manoa, Honolulu (2018-19).
Adviser for 48 MSc and 17 PhD students graduated. Currently he advises 7 PhD candidates and 2 post docs. He have published >140 papers in international scientific journals and been a co-editor for the books "Ecosystem Barents Sea" (Tapir Academic Press, 2009), Phytoplankton pigments: Updates on Characterization, Chemotaxonomy and Applications in Oceanography (Cambridge University Press, 2011) and “Life and Light in the Dead of Night” (Springer-Nature, published end of March 2020).
- Marine ecology and biodiversity in temperate, tropical and arctic regions
- Photosynthesis and eco-physiology in phytoplankton, ice algae and macroalgae
- Pigment chemotaxonomy, light harvesting and photo-protective function
- Underwater robotics and sensor development for in situ identification of organisms
- Mapping and monitoring of bio-geo-chemical objects of interest in the marine environment
- Polar night marine ecology
- Photo-biology - Light as a cue of light
- BI8061 - Biologisk oseanografi
- BI8075 - Muliggjørende teknologi for marine økologiske studier og marin vitenskap
- BI3062 - Forskningsseminar, marin
- BI3905 - Master Thesis in Marine Coastal Development
- BI3070 - Muliggjørende teknologi for marine økologiske studier og marin vitenskap
- BI8091 - Avansert biologi
- BI1002 - Faunistikk og floristikk
- BI8060 - Bio-optiske egenskaper og pigmentering i planter, alger og marine invertebrater
- BI3911 - Master thesis in MSAQUAH Health Management in Aquaculture
- BI2060 - Marin økologi
- BI3061 - Biologisk oseanografi
- BI2036 - Marin biodiversitet
- BI3910 - Master Thesis in Ocean Resources
Vitenskapelig, faglig og kunstnerisk arbeid
Et utvalg av nyere tidsskriftspublikasjoner, kunstneriske produksjoner, bok, inklusiv bokdeler og rapport-del. Se alle publikasjoner i databasen
- (2022) The role of parapodia and lack of photoacclimation in kleptoplasts of the sacoglossan sea slug Plakobranchus ocellatus. Coral reefs.
- (2022) Remote Sensing of the Tautra Ridge: An Overview of the World’s Shallowest Cold-Water Coral Reefs. Frontiers in Marine Science. vol. 9.
- (2022) Underwater Hyperspectral Imaging of Arctic Macroalgal Habitats during the Polar Night Using a Novel Mini-ROV-UHI Portable System. Remote Sensing. vol. 14 (6).
- (2021) Analysis and Model Development of Direct Hyperspectral Chlorophyll-A Estimation for Remote Sensing Satellites. Workshop on Hyperspectral Image and Signal Processing, Evolution in Remote Sensing.
- (2021) Photophysiological cycles in Arctic krill are entrained by weak midday twilight during the Polar Night. PLoS Biology. vol. 19 (10).
- (2021) Hyperspectral imaging as an emerging tool to analyze microplastics: A systematic review and recommendations for future development. Microplastics and Nanoplastics. vol. 1 (13).
- (2021) Pelagic organisms avoid white, blue, and red artificial light from scientific instruments. Scientific Reports. vol. 11 (1).
- (2021) All-sky camera system providing high temporal resolution annual time series of irradiance in the arctic. Applied Optics. vol. 60 (22).
- (2021) A Methodology for Consistent Georegistration in Underwater Hyperspectral Imaging. IEEE Journal of Oceanic Engineering.
- (2021) In situ recordings of large gelatinous spheres from NE Atlantic, and the first genetic confirmation of egg mass of Illex coindetii (Vérany, 1839) (Cephalopoda, Mollusca). Scientific Reports. vol. 11 (1).
- (2020) Artificial light during the polar night disrupts Arctic fish and zooplankton behavior down to 200 m depth. Communications Biology. vol. 3.
- (2020) Phytoplankton community succession and dynamics using optical approaches. Continental Shelf Research. vol. 213.
- (2020) Mapping the Historical Shipwreck Figaro in the High Arctic Using Underwater Sensor-Carrying Robots. Remote Sensing. vol. 12 (6).
- (2020) Benthic Communities on the Mohn’s Treasure Mound: Implications for Management of Seabed Mining in the Arctic Mid-Ocean Ridge. Frontiers in Marine Science. vol. 7.
- (2020) Advancing Ocean Observation with an AI-driven Mobile Robotic Explorer. Oceanography. vol. 33 (3).
- (2019) Toward adaptive robotic sampling of phytoplankton in the coastal ocean. Science robotics. vol. 4 (27).
- (2019) Physical controls on phytoplankton size structure, photophysiology and suspended particles in a Norwegian biological hotspot. Progress in Oceanography. vol. 175.
- (2019) Trait-based analysis of subpolar North Atlantic phytoplankton and plastidic ciliate communities using automated flow cytometer. Limnology and Oceanography. vol. 64 (4).
- (2019) Photoacclimation state of an Arctic underice phytoplankton bloom. Journal of Geophysical Research (JGR): Oceans. vol. 124 (3).
- (2019) Sea surface microlayer and elemental composition in phaeo-, chloro-, and rhodophytes in winter and spring. Journal of Phycology. vol. 55.