Zobrazeno 1 - 10
of 158
pro vyhledávání: '"Geir, Johnsen"'
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-16 (2023)
Abstract Arctic macroalgae species have developed different growth strategies to survive extreme seasonal changes in irradiance in polar regions. We compared photophysiological parameters such as the light saturation parameter (Ek) and pigment compos
Externí odkaz:
https://doaj.org/article/75b0a093aa6448aa958c5e15a23bfec9
Publikováno v:
Frontiers in Marine Science, Vol 11 (2024)
Seaweed farming is the fastest-growing aquaculture sector worldwide. As farms continue to expand, automated methods for monitoring growth and biomass become increasingly important. Imaging techniques, such as Computer Vision (CV), which allow automat
Externí odkaz:
https://doaj.org/article/efa8e517ead442a6b7671c94728a42ab
Publikováno v:
PLoS ONE, Vol 19, Iss 5, p e0302514 (2024)
Expanding spatial presentation from two-dimensional profile transects to three-dimensional ocean mapping is key for a better understanding of ocean processes. Phytoplankton distributions can be highly patchy and the accurate identification of these p
Externí odkaz:
https://doaj.org/article/52b5951efb7148f89ba98cc2ce79edbc
Autor:
Maxime Geoffroy, Tom Langbehn, Pierre Priou, Øystein Varpe, Geir Johnsen, Arnault Le Bris, Jonathan A. D. Fisher, Malin Daase, David McKee, Jonathan Cohen, Jørgen Berge
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
Abstract In situ observations of pelagic fish and zooplankton with optical instruments usually rely on external light sources. However, artificial light may attract or repulse marine organisms, which results in biased measurements. It is often assume
Externí odkaz:
https://doaj.org/article/df2ffea0b96f4428b7162d9ac3fcaa02
Autor:
Halldis Ringvold, Morag Taite, A. Louise Allcock, Michael Vecchione, Michel Péan, Roberto Sandulli, Geir Johnsen, Arne Fjellheim, Snorre Bakke, Hanne Sannæs, Ann-Elin Wårøy Synnes, José Coronel, Martin Hansen, Peter G. Olejar, Geir Eliassen, Anita Eliassen, Karl Klungland
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-22 (2021)
Abstract In total, 90 gelatinous spheres, averaging one meter in diameter, have been recorded from ~ 1985 to 2019 from the NE Atlantic Ocean, including the Mediterranean Sea, using citizen science. More than 50% had a dark streak through center. They
Externí odkaz:
https://doaj.org/article/650441c7c0e44f25bba832c8cb444bb4
Autor:
Sivert Bakken, Marie B. Henriksen, Roger Birkeland, Dennis D. Langer, Adriënne E. Oudijk, Simen Berg, Yeshi Pursley, Joseph L. Garrett, Fredrik Gran-Jansen, Evelyn Honoré-Livermore, Mariusz E. Grøtte, Bjørn A. Kristiansen, Milica Orlandic, Paul Gader, Asgeir J. Sørensen, Fred Sigernes, Geir Johnsen, Tor A. Johansen
Publikováno v:
Remote Sensing, Vol 15, Iss 3, p 755 (2023)
The HYPSO-1 satellite, a 6U CubeSat carrying a hyperspectral imager, was launched on 13 January 2022, with the Goal of imaging ocean color in support of marine research. This article describes the development and current status of the mission and pay
Externí odkaz:
https://doaj.org/article/92fd7c9235ea4c8da27e54ca88b4a4f7
Publikováno v:
Frontiers in Marine Science, Vol 9 (2022)
On the Tautra Ridge – a 39-100 m deep morainic sill located in the middle of the Trondheimsfjord, Norway – some of the world’s shallowest known occurrences of the scleractinian cold-water coral (CWC) Desmophyllum pertusum can be found. The earl
Externí odkaz:
https://doaj.org/article/f4cc47c2ca0745b0a50ff43a01b6d82d
Autor:
Glaucia M Fragoso, Emlyn J Davies, Trygve O Fossum, Jenny E Ullgren, Sanna Majaneva, Nicole Aberle, Martin Ludvigsen, Geir Johnsen
Publikováno v:
PLoS ONE, Vol 17, Iss 9, p e0273874 (2022)
Plankton distributions are remarkably 'patchy' in the ocean. In this study, we investigated the contrasting phytoplankton-zooplankton distributions in relation to wind mixing events in waters around a biodiversity-rich island (Runde) located off the
Externí odkaz:
https://doaj.org/article/23956c5ee2cd4efb893500db67a6314d
Pigments act as tracers to elucidate the fate of phytoplankton in the world's oceans and are often associated with important biogeochemical cycles related to carbon dynamics in the oceans. They are increasingly used in in situ and remote-sensing appl
Autor:
Jonathan H Cohen, Kim S Last, Corie L Charpentier, Finlo Cottier, Malin Daase, Laura Hobbs, Geir Johnsen, Jørgen Berge
Publikováno v:
PLoS Biology, Vol 19, Iss 10, p e3001413 (2021)
Light plays a fundamental role in the ecology of organisms in nearly all habitats on Earth and is central for processes such as vision and the entrainment of the circadian clock. The poles represent extreme light regimes with an annual light cycle in
Externí odkaz:
https://doaj.org/article/062b1b27a61149d98b306048c3169766