| Autor: |
Makarevich, P. R., Larionov, V. V., Vodopyanova, V. V., Bulavina, A. S., Ishkulova, T. G., Venger, M. P., Pastukhov, I. A., Vashchenko, A. V. |
| Předmět: |
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| Zdroj: |
Oceanology (00014370); Nov2021, Vol. 61 Issue 6, p930-943, 14p |
| Abstrakt: |
This paper describes the comprehensive studies of phytoplankton carried out in April 2018 in the northwestern Barents Sea, in the Polar Front region (74.8°–76.2° N), at a distance of 10–100 km from the ice edge at depths ranging from 0 to 50 m. The hydrological, hydrochemical, and microbiological parameters of the seawater are determined simultaneously. An early-spring species complex is observed on both sides of the front; 90% of the biomass of which is formed by the diatoms Pauliella taeniata, Fragilariopsis oceanica, and Thalassiosira antarctica var. borealis. The taxonomic composition of microalgae communities in water masses of different origin has an 83% similarity. The average abundance and biomass of microalgae and chlorophyll-a content per m2 in Atlantic waters reaches 37 170 cells/L, 0.12 μg/L, and 0.5 mg/m3, respectively. In Arctic waters, these values are about 30 times higher, 0.87 million cells/L, 2.59 μg/L, and 3.13 mg/m3, respectively. The results obtained suggest that the Polar Front is not a boundary between various algal communities, but separates highly productive Arctic waters from Atlantic waters with low phytoplankton abundance. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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