Blar i forfatter "Pitusi, Vanessa"

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    • Interactive effects of ocean acidification and temperature on oxygen uptake rates in Calanus hyperboreus nauplii 

      Espinel Velasco, Nadjejda; Gawinski, Christine; Kohlbach, Doreen; Pitusi, Vanessa; Graeve, Martin; Hop, Haakon (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-26)
      The Arctic region is undergoing rapid and significant changes, characterized by high rates of acidification and warming. These transformations prompt critical questions about the resilience of marine communities in the face of environmental change. In the Arctic, marine zooplankton and in particular calanoid copepods play a vital role in the food web. Changes in environmental conditions could ...

    • The occurrence of Nematoda in coastal sea ice on Svalbard (European Arctic) determined with the 18S small subunit rRNA gene 

      Pitusi, Vanessa; Søreide, Janne; Hassett, Brandon; Marquardt, Miriam; Andreasen, Magnus Heide (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-06)
      Understanding the diversity and functioning of Arctic sea ice ecosystems is vital to evaluate and predict the impact of current and future climate change. In the microscopic communities inhabiting the brine channels inside sea ice, nematodes often dominate numerically and act as bacterivores and herbivores. Despite nematodes great abundances and known ecological roles, molecular tools have not been ...

    • Seasonal abundance and activity of sympagic meiofauna in Van Mijenfjorden, Svalbard 

      Pitusi, Vanessa (Master thesis; Mastergradsoppgave, 2019-05-15)
      The importance of landfast ice as a nursery and breeding ground for Arctic marine invertebrates was studied in Van Mijenfjorden (77°N, 15/16°W), southwestern Svalbard from March to May 2017. The collection of first-year ice cores with stations along a depth gradient allowed the investigation of both temporal and spatial differences in sympagic meiofauna community composition and abundance. Furthermore, ...

    • Temporal and spatial variability of sympagic metazoans in a high-Arctic fjord, Svalbard 

      Pitusi, Vanessa; Gradinger, Rolf Rudolf; Søreide, Janne (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-08)
      Svalbard is one of the fastest warming regions in the Arctic including massive loss in fjord sea ice both in terms of area coverage, ice thickness and duration. Sea ice is a habitat for a wide variety of microscopic flora and fauna, and we know little about the impact of accelerated loss of sea ice on this unique sea ice community. Here, we present the first study on the seasonal progression and ...