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    • Aggregate feeding by the copepods Calanus and Pseudocalanus controls carbon flux attenuation in the Arctic shelf sea during the productive period 

      van der Jagt, Helga; Wiedmann, Ingrid; Hildebrandt, Nicole; Niehoff, Barbara; Iversen, Morten H. (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-24)
      Up to 95% of the oceanic primary production is recycled within the upper few hundred meters of the water column. Marine snow and zooplankton fecal pellets in the upper water column are often recycled at rates exceeding those measured for microbial degradation, suggesting that zooplankton might be important for flux attenuation of particulate organic carbon in the upper ocean. However, direct evidence ...

    • Sea ice decline drives biogeographical shifts of key Calanus species in the central Arctic Ocean 

      Ershova, Elizaveta A.; Kosobokova, Ksenia N.; Banas, Neil S.; Ellingsen, Ingrid; Niehoff, Barbara; Hildebrandt, Nicole; Hirche, Hans-Juergen (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-19)
      In recent decades, the central Arctic Ocean has been experiencing dramatic decline in sea ice coverage, thickness and extent, which is expected to have a tremendous impact on all levels of Arctic marine life. Here, we analyze the regional and temporal changes in pan-Arctic distribution and population structure of the key zooplankton species <i>Calanus glacialis</i> and <i>C. hyperboreus</i> in ...