Geir Johnsen
Background and activities
Geir Johnsen is a professor in marine biology at the Department of Biology (NTNU), 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). Currently he is on a 1 year research stay at University of Hawaii at Manoa, Honululu working with spectral bioluminescence in different taxa and mapping and monitoring of coral reefs.
Research areas
- Marine ecology and biodiversity
- Bio-optics
- Photosynthesis
- Pigment chemotaxonomy
- Underwater robotics and sensor development for in situ identification
- Mapping and monitoring of bio-geo-chemical objects of interest in the marine environment
He has been an adviser for 47 MSc students and 17 PhD candidates. Currently, he advises 3 MSc students and 5 PhD candidates.
He has published more than 130 papers in international scientific journals and been a co-editor for the books:
- "Ecosystem Barents Sea" (Tapir Academic Press)
- "Phytoplankton pigments: Updates on Characterization, Chemotaxonomy and Applications in Oceanography" (Cambridge University Press, 2011).
Courses
- BI3070 - Enabling Technology for Marine Ecological and Marine Sciences studies
- BI8091 - Advanced Biology
- BI2036 - Marine Biodiversity
- BI3061 - Biological Oceanography
- BI3911 - Master thesis in MSAQUAH Health Management in Aquaculture
- BI8061 - Biological Oceanography
- BI1002 - Faunistics and Floristics
- BI3910 - Master Thesis in Ocean Resources
- BI2060 - Marine Ecology
- BI3062 - Science Seminars, Marine
- BI8060 - Bio Optical Properties and Pigmentation in Plants, Algeas and Marine Invertebrates
- BI8075 - Enabling Technology for Marine Ecological and Marine Sciences studies
Scientific, academic and artistic work
A selection of recent journal publications, artistic productions, books, including book and report excerpts. See all publications in the database
Journal publications
- (2022) The role of parapodia and lack of photoacclimation in kleptoplasts of the sacoglossan sea slug Plakobranchus ocellatus. Coral reefs.
- (2022) Contrasting phytoplankton-zooplankton distributions observed through autonomous platforms, in-situ optical sensors and discrete sampling. PLOS ONE. vol. 17 (9).
- (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. vol. 47 (2).
- (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).