• An ice-tethered buoy for fish and plankton research 

      Zolich, Artur Piotr; De La Torre, Pedro R.; Rodwell, Shane; Geoffroy, Maxime; Johnsen, Geir; Berge, Jørgen (Chapter, 2018)
      I.In this paper the authors present bio-acoustical icetethered platform for optical, physical and ecological sensors (POPE), i.e. an ice-tethered buoy, equipped with an AZFP scientific echosounder for fish and plankton ...
    • Arctic complexity: A case study on diel vertical migration of zooplankton 

      Berge, Jørgen; Cottier, Finlo; Varpe, Øystein; Renaud, Paul; Falk-Petersen, Stig; Kwasniewski, Sawomir; Griffiths, Colin; Søreide, Janne; Johnsen, Geir; Aubert, Anais; Bjærke, Oda; Hovinen, Johanna Emilia Heidi; Jung-Madsen, Signe; Tveit, Martha; Markkula, Sanna (Journal article; Peer reviewed, 2014)
    • Artificial light during the polar night disrupts Arctic fish and zooplankton behavior down to 200 m depth 

      Berge, Jørgen; Geoffroy, Maxime; Daase, Malin; Cottier, Finlo Robert; Priou, Pierre; Cohen, Jonathan H.; Johnsen, Geir; McKee, David; Kostakis, I; Renaud, Paul E.; Vogedes, Daniel Ludwig; Anderson, Philip J.; Last, Kim; Gauthier, Stephane (Peer reviewed; Journal article, 2020)
      For organisms that remain active in one of the last undisturbed and pristine dark environments on the planet—the Arctic Polar Night—the moon, stars and aurora borealis may provide important cues to guide distribution and ...
    • Benthic scavenger community composition and carrion removal in Arctic and Subarctic fjords 

      Dunlop, Katherine Mary; Renaud, Paul Eric; Berge, Jørgen; Jones, Daniel O.B.; Harbour, Rob P.; Tandberg, Anne Helene S.; Sweetman, Andrew K. (Peer reviewed; Journal article, 2020)
      In high latitude coastal regions, benthic scavenger communities are largely composed of invertebrates that play a key role in the cycling of organic matter. Factors including temperature and depth can structure Arctic and ...
    • Bioluminescence as an ecological factor during high Arctic polar night 

      Cronin, Heather; Cohen, Jonathan H.; Berge, Jørgen; Johnsen, Geir; Moline, Mark A. (Journal article; Peer reviewed, 2016)
      Bioluminescence commonly influences pelagic trophic interactions at mesopelagic depths. Here we characterize a vertical gradient in structure of a generally low species diversity bioluminescent community at shallower ...
    • Development of a bio-optical model for the Barents Sea to quantitatively link glider and satellite observations: A bio-optical model for the Barents Sea 

      Kostakis, I.; Röttgers, R.; Orkney, A.; Bouman, H.A.; Porter, M.; Cottier, Finlo Robert; Berge, Jørgen; Mckee, David (Peer reviewed; Journal article, 2020)
      A bio-optical model for the Barents Sea is determined from a set of in situ observations of inherent optical properties (IOPs) and associated biogeochemical analyses. The bio-optical model provides a pathway to convert ...
    • Diel vertical migration of Arctic zooplankton during the polar night 

      Berge, Jørgen; Cottier, Finlo; Last, Kim S.; Varpe, Øystein; Leu, Eva; Søreide, Janne; Eiane, Ketil; Falk-Petersen, S.; Willis, Kate; Nygård, Henrik; Vogedes, Daniel; Griffiths, Collin; Johnsen, Geir; Lorentzen, Dag Arne; Brierley, A.S. (Journal article; Peer reviewed, 2009)
      High-latitude environments show extreme seasonal variation in physical and biological variables. The classic paradigm of Arctic marine ecosystems holds that most biological processes slow down or cease during the polar ...
    • Eat or sleep: Availability of winter prey explains mid-winter and spring activity in an Arctic Calanus population 

      Hobbs, Laura; Banas, Neil S.; Cottier, Finlo Robert; Berge, Jørgen; Daase, Malin (Peer reviewed; Journal article, 2020)
      Copepods of the genus Calanus have adapted to high levels of seasonality in prey availability by entering a period of hibernation during winter known as diapause, but repeated observations of active Calanus spp. have been ...
    • Fatty acid composition of the postlarval daubed shanny (Leptoclinus maculatus) during the polar night 

      Pekkoeva, Svetlana N.; Murzina, Svetlana A.; Nefedova, Zinaida A.; Falk-Pedersen, Stig; Berge, Jørgen; Lønne, Ole Jørgen; Nemova, Nina N. (Peer reviewed; Journal article, 2020)
      Recent discoveries of high levels of biological activity in the Arctic marine ecosystems during the polar night raise questions regarding the ecophysiology of the pelagic postlarval daubed shanny Leptoclinus maculatus. Of ...
    • Growth and behaviour of blue mussels, a re-emerging polar resident, follow a strong annual rhythm shaped by the extreme high Arctic light regime: Mussels' growth and behavior in Arctic 

      Tran, Damien; Andrade Rodriguez, Hector Antonio; Durier, Guillaume; Ciret, Pierre; Leopold, Peter; Sow, Mohamedou; Ballantine, Carl; Camus, Lionel; Berge, Jørgen; Perrigault, Mickael (Peer reviewed; Journal article, 2020)
      Polar regions are currently warming at a rate above the global average. One issue of concern is the consequences on biodiversity in relation to the Northward latitudinal shift in distribution of temperate species. In the ...
    • Growth and metabolism of adult polar cod (Boreogadus saida) in response to dietary crude oil 

      Nahrgang, Jasmine; Bender, Morgan Lizabeth; Meier, Sonnich; Nechev, Jordan; Berge, Jørgen; Frantzen, marianne (Journal article; Peer reviewed, 2019)
      The increasing human presence in the Arctic shelf seas, with the expansion of oil and gas industries and maritime shipping, poses a risk for Arctic marine organisms such as the key species polar cod (Boreogadus saida). The ...
    • In the dark: a review of ecosystem processes during the Arctic polar night 

      Berge, Jørgen; Renaud, Paul; Darnis, Gérald; Cottier, Finlo; Last, Kim; Gabrielsen, Tove M.; Johnsen, Geir; Seuthe, Lena; Weslawski, Jan Marcin; Leu, Eva; Moline, Mark A.; Nahrgang, Jasmine; Søreide, Janne; Varpe, Øystein; Lønne, Ole Jørgen; Daase, Malin; Falk-Petersen, Stig (Journal article, 2015)
      Several recent lines of evidence indicate that the polar night is key to understanding Arctic marine ecosystems. First, the polar night is not a period void of biological activity even though primary production is close ...
    • Is ambient light during the high Arctic polar night sufficient to act as a visual cue for zooplankton? 

      Cohen, Jonathan H.; Berge, Jørgen; Moline, Mark A.; Sørensen, Asgeir Johan; Last, Kim; Falk-Petersen, Stig; Renaud, Paul; Leu, Eva; Grenvald, Julie Cornelius; Cottier, Finlo; Cronin, Heather; Menze, Sebastian; Norgren, Petter; Varpe, Øystein; Daase, Malin; Darnis, Gérald; Johnsen, Geir (Journal article, 2015)
      The light regime is an ecologically important factor in pelagic habitats, influencing a range of biological processes. However, the availability and importance of light to these processes in high Arctic zooplankton communities ...
    • Light in the Polar Night 

      Cohen, Jonathan H.; Berge, Jørgen; Moline, Mark A.; Johnsen, Geir; Zolich, Artur Piotr (Chapter, 2020)
      How much light isa vailable for biological processes during Polar Night? This question appears simple enough. But the reality is that conventional light sen- sors for measuring visible light (~350 to ~700 nm) have not been ...
    • Mapping of a seagrass habitat in Hopavågen, Sør-Trøndelag, with the use of an Autonomous Surface Vehicle combined with optical techniques 

      Alvsvåg, Dora Marie (Master thesis, 2017)
      Mapping and monitoring of marine habitats are important for proper management and decision making. However, shallow coastal habitats (0 5 meters depth) are largely under-sampled in time and space. Knowledge about morphology, ...
    • Mapping the Historical Shipwreck Figaro in the High Arctic Using Underwater Sensor-Carrying Robots 

      Mogstad, Aksel Alstad; Ødegård, Øyvind; Nornes, Stein Melvær; Ludvigsen, Martin; Johnsen, Geir; Sørensen, Asgeir Johan; Berge, Jørgen (Peer reviewed; Journal article, 2020)
      In 2007, a possible wreck site was discovered in Trygghamna, Isfjorden, Svalbard by the Norwegian Hydrographic Service. Using (1) a REMUS 100 autonomous underwater vehicle (AUV) equipped with a sidescan sonar (SSS) and (2) ...
    • Night Matters—Why the Interdisciplinary Field of “Night Studies” Is Needed 

      Kyba, Christopher C.M.; Pritchard, Sara B.; Ekrich, A. Roger; Eldridge, Adam; Jechow, Andreas; Preiser, Christine; Berge, Jørgen (Journal article; Peer reviewed, 2020)
      The night has historically been neglected in both disciplinary and interdisciplinary research. To some extent, this is not surprising, given the diurnal bias of human researchers and the difficulty of performing work at ...
    • Operative Habitat Mapping and Monitoring in the Polar Night 

      Johnsen, Geir; Mogstad, Aksel Alstad; Berge, Jørgen; Cohen, Jonathan H. (Chapter, 2020)
      The Polar Night has long been regarded as a period of no biological activity. As a logical consequence, environmental management has mainly been neglected in this period. We will use the Northguider accident in December ...
    • Pelagic occurrences of the ice amphipod Apherusa glacialis throughout the Arctic 

      Kunisch, Erin; Bluhm, Bodil; Daase, Malin; Gradinger, Rolf; Hop, Haakon; Melnikov, Igor A.; Øystein, Varpe; Berge, Jørgen (Journal article; Peer reviewed, 2020)
      Apherusa glacialis is a common, sea ice-associated amphipod found throughout the Arctic Ocean and has long been considered permanently associated with the sea ice habitat. However, pelagic occurrences of A. glacialis have ...