Blar i Bergen Open Research Archive på forfatter "Aksnes, Dag Lorents"

Viser treff 21-28 av 28

    • Scaling laws in phytoplankton nutrient uptake affinity 

      Lindemann, Christian; Fiksen, Øyvind; Andersen, Ken Haste; Aksnes, Dag Lorents (Peer reviewed; Journal article, 2016-03-11)
      Nutrient uptake affinity affects the competitive ability of microbial organisms at low nutrient concentrations. From the theory of diffusion limitation it follows that uptake affinity scales linearly with the cell radius. ...

    • Sensitivity of euphotic zone properties to CDOM variations in marine ecosystem models 

      Urtizberea, Agurtzane; Dupont, Nicolas; Rosland, Rune; Aksnes, Dag Lorents (Peer reviewed; Journal article, 2013-05-10)
      In marine ecosystem models, the underwater light intensity is commonly characterized by the shading of phytoplankton in addition to a background light attenuation coefficient. Colour dissolved organic matter (CDOM) is an ...

    • Structure and functioning of four North Atlantic ecosystems - A comparative study 

      Melle, Webjørn Raunsgård; Klevjer, Thor A.; Drinkwater, Kenneth F.; Strand, Espen; Naustvoll, Lars Johan; Wiebe, Peter H.; Aksnes, Dag Lorents; Knutsen, Tor; Sundby, Svein; Slotte, Aril; Dupont, Nicolas; Salvanes, Anne Gro Vea; Korneliussen, Rolf; Huse, Geir (Journal article; Peer reviewed, 2020)
      The epi- and mesopelagic ecosystems of four sub-polar ocean basins, the Labrador, Irminger, Iceland and Norwegian seas, were surveyed during two legs from Bergen, Norway, to Nuuk, Greenland, and back to Bergen. The survey ...

    • Sverdrup critical depth and the role of water clarity in Norwegian Coastal Water 

      Aksnes, Dag Lorents (Peer reviewed; Journal article, 2015-02-25)
      The critical depth concept was first recognized by Gran and Braarud (1935). During summer, in the Bay of Fundy, they observed an unexpected no bloom situation. Their interpretation was that high amounts of detritus of ...

    • Tracking freshwater browning and coastal water darkening from boreal forests to the Arctic Ocean 

      Opdal, Anders Martin Frugård; Andersen, Tom; Hessen, Dag Olav; Lindemann, Christian; Aksnes, Dag Lorents (Journal article; Peer reviewed, 2023)
      The forest cover of Northern Europe has been steadily expanding during the last 120 years. More terrestrial vegetation and carbon fixation leads to more export to surface waters. This may cause freshwater browning, as more ...

    • Unclear associations between small pelagic fish and jellyfish in several major marine ecosystems 

      Opdal, Anders Frugård; Brodeur, Richard D.; Cieciel, Kristin; Daskalov, Georgi; Mihneva, Vesselina; Ruzicka, James J; Verheye, Hans M.; Aksnes, Dag Lorents (Peer reviewed; Journal article, 2019-02-28)
      During the last 20 years, a series of studies has suggested trends of increasing jellyfish (Cnidaria and Ctenophora) biomass in several major ecosystems worldwide. Some of these systems have been heavily fished, causing a ...

    • Vertical distribution and migration of mesopelagic scatterers in four north Atlantic basins 

      Klevjer, Thor A.; Melle, Webjørn Raunsgård; Knutsen, Tor; Aksnes, Dag Lorents (Journal article; Peer reviewed, 2020)
      We studied vertical distribution and diel vertical migration (DVM) behaviour of mesopelagic acoustic scattering layers in relation to environmental conditions in the Norwegian Sea, the Iceland Sea, the Irminger Sea, and ...

    • Vertical distribution and trophic interactions of zooplankton and fish in Masfjorden, Norway 

      Giske, Jarl; Aksnes, Dag Lorents; Balino, Beatriz M.; Kaartvedt, Stein; Lie, Ulf; Nordeide, Jarle Tryti; Salvanes, Anne Gro Vea; Wakili, Sami M.; Aadnesen, Agnes (Peer reviewed; Journal article, 1990)
      The distribution, biomass, and predator-prey relationships of the pelagic assemblage in Masfjorden, western Norway, was studied in January 1989. The pelagic biomass was dominated by particulate organic matter. Biomasses ...