Publication Date:
2023-05-12
Description:
Spring bloom of cold-water centric and pennate diatoms was observed in two different areas of the southeastern Barents Sea in April 2000: ice-free waters off the Kolguev Island northern shelf and the eastern Pechora Sea near the Karskie Vorota (Kara Gate) Straight in polynyas and ice-free patches in one-year-old ice. Maximal values of phytoplankton abundance and biomass were found at the ice edge. The bloom was localized in shallow water areas with depths less than 50 m in mixing zones of waters of different origin: warm Atlantic, cold coastal, and Arctic (Litke current) waters. Ice melting was among factors inducing the phytoplankton bloom. Each area had a specific phytocoenosis, whose structure was determined by water origin and ice conditions. In the western Kara Sea, under a solid (up to 30 cm thick) ice cover (i.e., under conditions of a hydrological winter), a spring phytoplankton succession was observed from its initial stage. In areas located close to the ice-cover edge, simultaneously with the mass phytoplankton bloom, the early spring zoocoenosis development manifested itself in mass spawning of euphausiids and mass appearance of Cirripedia nauplii and bottom polychaete larvae.
Keywords:
Archive of Ocean Data; ARCOD; Barents Sea; Kara Sea; MULT; Multiple investigations; Pechora Sea; Russia-2000-1; Russia-2000-10; Russia-2000-11; Russia-2000-12; Russia-2000-2; Russia-2000-3; Russia-2000-31; Russia-2000-4; Russia-2000-5; Russia-2000-6; Russia-2000-7
Type:
Dataset
Format:
application/zip, 3 datasets
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