Blar i forfatter "Wiktor, Józef Maria"

Viser treff 1-4 av 4

    • Arctic sea ice algae differ markedly from phytoplankton in their ecophysiological characteristics 

      Kvernvik, Ane Cecilie; Hoppe, Clara Jule Marie; Greenacre, Michael; Verbiest, Sander; Wiktor, Józef Maria; Gabrielsen, Tove M.; Reigstad, Marit; Leu, Eva (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-20)
      Photophysiological and biochemical characteristics were investigated in natural communities of Arctic sea ice algae and phytoplankton to understand their respective responses towards variable irradiance and nutrient regimes. This study revealed large differences in photosynthetic efficiency and capacity between the 2 types of algal assemblages. Sea ice algal assemblages clearly displayed increased ...

    • Pelagic Ecosystem Characteristics Across the Atlantic Water Boundary Current from Rijpfjorden, Svalbard, to the Arctic Ocean during Summer (2010-2014) 

      Hop, Haakon; Assmy, Philipp; Wold, Anette; Sundfjord, Arild; Daase, Malin; Duarte, Pedro; Kwasniewski, Slawomir; Gluchowska, Marta; Wiktor, Józef Maria; Tatarek, Agnieszka; Wiktor, Józef Maria Jr.; Kristiansen, Svein; Fransson, Agneta Ingrid; Chierici, Melissa; Vihtakari, Mikko (Journal article; Peer reviewed, 2019-04-09)
      The northern coast of Svalbard contains high-arctic fjords, such as Rijpfjorden (80°N 22°30′E). This area has experienced higher sea and air temperatures and less sea ice in recent years, and models predict increasing temperatures in this region. Part of the West Spitsbergen Current (WSC), which transports relatively warm Atlantic water along the continental slope west of Svalbard, bypasses these ...

    • Tidewater glaciers and bedrock characteristics control the phytoplankton growth environment in a fjord in the arctic 

      Halbach, Laura; Vihtakari, Mikko; Duarte, Pedro; Everett, Alistair; Granskog, Mats; Hop, Haakon; Kauko, Hanna Maria; Kristiansen, Svein; Myhre, Per Inge; Pavlov, Alexey K.; Pramanik, Ankit; Tatarek, Agnieszka; Torsvik, Tomas; Wiktor, Józef Maria; Wold, Anette; Wulff, Angela; Steen, Harald; Assmy, Philipp (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-05-31)
      Meltwater discharge from tidewater glaciers impacts the adjacent marine environment. Due to the global warming, tidewater glaciers are retreating and will eventually terminate on land. Yet, the mechanisms through which meltwater runoff and subglacial discharge from tidewater glaciers influence marine primary production remain poorly understood, as data in close proximity to glacier fronts are scarce. ...

    • When a year is not enough: Further study of the seasonality of planktonic protist communities structure in an ice-free high arctic fjord (adventfjorden, west spitsbergen) 

      Dabrowska, Anna Maria; Wiktor, Józef Maria; Wiktor, Józef Mikolaj; Kristiansen, Svein; Vader, Anna; Gabrielsen, Tove (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-20)
      As a contribution to understanding the ecological framework of protistan seasonal succession patterns, we present the weekly-to-monthly (January–October) light microscopy-based study of nano- and microplanktonic protist communities of Adventfjorden waters in 2013. In general, protist dynamics corresponded to the classic paradigm for the Arctic ice-free waters with extremely low abundance and diversity ...