• 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) ...
    • A marine zooplankton community vertically structured by light across diel to interannual timescales 

      Hobbs, Laura; Banas, Neil S.; Cohen, Jonathan H.; Cottier, Finlo Robert; Berge, Jørgen; Varpe, Øystein (Journal article; Peer reviewed, 2021)
      The predation risk of many aquatic taxa is dominated by visually searching predators, commonly a function of ambient light. Several studies propose that changes in visual predation will become a major climate-change impact ...
    • 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 ...
    • Pelagic organisms avoid white, blue, and red artificial light from scientific instruments 

      Geoffroy, Maxime; Langbehn, Tom; Priou, Pierre; Varpe, Øystein; Johnsen, Geir; Le Bris, Arnault; Fisher, Jonathan A. D.; Daase, Malin; Mckee, David; Cohen, Jonathan H.; Berge, Jørgen (Journal article; Peer reviewed, 2021)
      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. ...
    • Photophysiological cycles in Arctic krill are entrained by weak midday twilight during the Polar Night 

      Cohen, Jonathan H.; Last, Kim; Charpentier, Corie L.; Cottier, Finlo; Daase, Malin; Hobbs, Laura; Johnsen, Geir; Berge, Jørgen (Peer reviewed; Journal article, 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 ...
    • Pinngortitaq – a place of becoming 

      Lennert, Ann Eileen; Berge, Jørgen (Journal article; Peer reviewed, 2019)
      Arctic ecosystems are on the verge of changes that are unprecedented in both magnitude and velocity. We stress that statements of a changing climate and environment have ambiguous definitions in both theoretical and ...
    • Population structure, parasitism and prey preference in Sclerocrangon boreas and S. ferox, Svalbard 

      Bjørdalsbakke, Lise Kristin (Master thesis, 2011)
      The aim of this study was to enhance the knowledge on ecological and life-history parameters of Sclerocrangon boreas and Sclerocrangon ferox in Svalbard waters, including sex ratio, population structure, parasitism and ...
    • Seabirds during Arctic Polar Night: underwater observations from Svalbard archipelago, Norway 

      Ostaszewska, Kaja; Balazy, Piotr; Berge, Jørgen; Johnsen, Geir; Staven, Robert (Journal article; Peer reviewed, 2017)
      Visually-oriented predators, such as seabirds, are highly light dependent, and thus their presence and activity under continuously dark conditions of Arctic polar night pose a number of questions about the strategies and ...
    • Seasonal Variability in the Zooplankton Community Structure in a Sub-Arctic Fjord as Revealed by Morphological and Molecular Approaches 

      Coguiec, Estelle; Ershova, Elizaveta; Daase, Malin; Vonnahme, Tobias R.; Wangensteen, Owen S.; Gradinger, Rolf; Præbel, Kim; Berge, Jørgen (Peer reviewed; Journal article, 2021)
      Phyto- and zooplankton in Arctic and sub-Arctic seas show very strong seasonal changes in diversity and biomass. Here we document the seasonal variability in the mesozooplankton community structure in a sub-Arctic fjord ...
    • Shallow-Water Scavengers of Polar Night and Day – An Arctic Time-Lapse Photography Study 

      Bałazy, Piotr; Anderson, Marti J.; Chełchowski, Maciej; Włodarska-Kowalczuk, Maria; Kukliński, Piotr; Berge, Jørgen (Journal article; Peer reviewed, 2021)
      Until recently, polar night constituted truly a “mare incognitum” of our times. Yet, the first records from this very little-explored period showcased a surprisingly rich and active ecosystem. This investigation aims to ...
    • Summer and winter MgCO3 levels in the skeletons of Arctic bryozoans 

      Iglikowska, Anna; Krzemińska, Małgorzata; Renaud, Paul Eric; Berge, Jørgen; Hop, Haakon; Kuklinski, Piotr (Peer reviewed; Journal article, 2020)
      In the Arctic, seasonal patterns in seawater biochemical conditions are shaped by physical, chemical, and biological processes related to the alternation of seasons, i.e. winter polar night and summer midnight sun. In ...
    • The advective origin of an under-ice spring bloom in the Arctic Ocean using multiple observational platforms 

      Johnsen, Geir; Norli, Marit; Moline, Mark A.; Robbins, Ian; Quillfeldt, Cecilie von; Sørensen, Kai; Cottier, Finlo Robert; Berge, Jørgen (Journal article; Peer reviewed, 2018)
      Under-ice blooms of phytoplankton in the Chukchi Sea have been observed, with strong implications for our understanding of the production regimes in the Arctic Ocean. Using a combination of satellite remote sensing of ...
    • Towards a unifying pan-arctic perspective: A conceptual modelling toolkit 

      Wassmann, Paul; Carmack, E.; Bluhm, Bodil; Duarte, Carlos M.; Berge, Jørgen; Brown, K.; Grebmeier, Jacqueline M.; Holding, Johnna; Kosobokova, Ksenia; Kwok, R.; Matrai, Patricia A.; Agusti, S.; Babin, Marcel; Bhatt, Uma S.; Eicken, Hajo; Polyakov, Igor V.; Rysgaard, Søren; Huntington, Henry P. (Peer reviewed; Journal article, 2020)
      The Arctic Ocean is overwhelmingly forced by its lateral boundaries, and interacts with, the global system. For the development of nested conceptual models of the Arctic Ocean ecosystem we here choose the full pan-Arctic ...
    • Use of an Autonomous Surface Vehicle reveals small-scale diel vertical migrations of zooplankton and susceptibility to light pollution under low solar irradiance 

      Ludvigsen, Martin; Berge, Jørgen; Geoffroy, Maxime; Cohen, Jonathan H.; De La Torre, Pedro R.; Nornes, Stein Melvær; Singh, Hanumant; Sørensen, Asgeir Johan; Daase, Malin; Johnsen, Geir (Journal article; Peer reviewed, 2018)
      Light is a major cue for nearly all life on Earth. However, most of our knowledge concerning the importance of light is based on organisms’ response to light during daytime, including the dusk and dawn phase. When it is ...
    • Variability in Calanus spp. abundance on fine- to mesoscales in an Arctic fjord: implications for little auk feeding 

      Vogedes, Daniel Ludwig; Eiane, Ketil; Båtnes, Anna Solvang; Berge, Jørgen (Journal article; Peer reviewed, 2014)
      We studied the abundance of calanoid copepods of the genus Calanus in a high-resolution sampling grid located in the vicinity of a breeding colony of an avian Calanus predator, the little auk (Alle alle) in an Arctic fjord ...
    • Zooplankton and sediment fluxes in two contrasting fjords reveal Atlantification of the Arctic 

      Weydmann-Zwolicka, Agata; Prątnicka, Paula; Łącka, Magdalena; Majaneva, Sanna; Cottier, Finlo Robert; Berge, Jørgen (Peer reviewed; Journal article, 2021)
      Svalbard fjords are facing a significant increase in Atlantic water inflow, which influences all ecosystem components, thus the objective of this study was to assess how recent Atlantification impacts the functioning of ...