The Long-Term Dynamics and Morphology of the Diatom Thalassiosira nordenskioeldii Cleve, 1873 (Bacillariophyta) from the Coastal Waters of Peter the Great Bay, Sea of Japan

Long-term study of the species composition and numbers of phytoplankton in the coastal waters of Peter the Great Bay, the Sea of Japan, revealed the seasonal and year-to-year dynamics in the abundance of the diatom Thalassiosira nordenskioeldii Cleve, 1873. The species dominated the phytoplankton in...

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Bibliographic Details
Published in:Russian journal of marine biology 2020-07, Vol.46 (4), p.284-291
Main Authors: Shevchenko, O. G., Shulgina, M. A., Shulkin, V. M., Tevs, K. O.
Format: Article
Language:English
Subjects:
Abundance
Biomedical and Life Sciences
Coastal waters
Community composition
Diatoms
Freshwater & Marine Ecology
Geographical distribution
Life Sciences
Nitrates
Organic matter
Original Papers
Peter I, Tsar of Russia (1672-1725)
Phytoplankton
Plankton
Population dynamics
Salinity
Salinity effects
Sea ice
Seawater
Species composition
Spring
Surface temperature
Surface water
Thalassiosira nordenskioeldii
Tropical climate
Water salinity
Water temperature
Winter
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Summary:Long-term study of the species composition and numbers of phytoplankton in the coastal waters of Peter the Great Bay, the Sea of Japan, revealed the seasonal and year-to-year dynamics in the abundance of the diatom Thalassiosira nordenskioeldii Cleve, 1873. The species dominated the phytoplankton in the winter and early spring, growing under the sea ice at a surface water temperature of –1.8 to 0°С and a salinity of 33.0–35.0‰. The observations of the long-term population dynamics of T. nordenskioeldii (2005–2015) showed a decline in its significance in the phytoplankton community compared to that in the 1970s, resulting in a complete loss of dominance in winter–spring plankton assemblages. The year-round occurrence of T. nordenskioeldii cells in the studied area, as well as data from the literature, indicate that the species has a tropical–arctic–boreal distribution. Positive correlations were found between the surface water salinity, the content of organic matter in seawater, and the abundance of T. nordenskioeldii. A negative relationship with nitrate concentration reflected a depletion of nitrates caused by the mass growth of T. nordenskioeldii.
ISSN:1063-0740
1608-3377
DOI:10.1134/S1063074020040069