On the Role of Small Photosynthetic Flagellatesin the Fall Phytoplankton Community of Onega Bay, White SeaстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 4 марта 2022 г.
Аннотация:The abundance, biomass, size structure of small photosynthetic flagellates (SPF; 3–10 μm), chlorophyll a (Chl a), and the contribution of SPF to the total phytoplankton biomass were studied inOnega Bay of the White Sea in September 2019. The Chl a concentration in the surface water layer of the bay varies from 0.36 to 0.83 mg/m3. The сontribution of photosynthetic algae to the total phytoplankton biomass ranges from 79% to 83%. The abundance and biomass of SPF in the photic layer varies from 0.04 × 109 to 0.22 × 109 cells/m3 and from 0.64 to 6.4 mg C/m3, respectively. Flagellates with a cell size of 6–10 μm dominate in the total SPF biomass and their share averages 82%. The SPF contribution to the total phytoplankton biomass in Onega Bay varies from 6% to 58% and does not depend on the phase of thetidal cycle. The obtained data on the SPF abundance evidenced that this group of protists plays a significant role in phytoplankton communities, and their estimate results in higher values of the total phytoplankton biomass of the White Sea in the fall compared to data obtained earlier.