SPATIAL DISTRIBUTION OF THE WHITE SEA PICOPHYTOPLANKTON IN THE BEGINNING OF THE SUMMER
Abstract
Biomass of photosynthetic picoplankton (Bpic), its contribution to the total phytoplankton biomass (Bpic%), chlorophyll a concentration (Chl), and associated hydrophysical characteristics of water masses were estimated in the White Sea in June of 2015 on 47 stations in Onega and Kandalaksha Bays, including inlets, and in the western part of Basin. Spatial variability of Bpic mean values in photic layer (0.01-1.91 mg С/м3) was determined by sub- and mesoscale heterogeneity of hydrological conditions. The values of Bpic were higher near frontal zones than in the water masses with quasi-homogenous distribution of thermohaline characteristics. The relative contribution of Bpic did not exceed 1% at half of the stations and varied from 1 to 8% on the rest of the water area. The value of Bpic% riched 40.5% in the Basin and did not exceed 2% during the phytoplankton bloom in Knyazhaya Inlet (Chl>3 mg/m3) with the dominance of Skeletonema costatum sensu lato.
About the Authors
L. V. Ilyash
Lomonosov Moscow State University
Russian Federation
Russian Federation
Department of Hydrobiology, School of Biology,
Leninskiye gory 1–12, Moscow, 119234
T. A. Belevich
Lomonosov Moscow State University
Russian Federation
Russian Federation
Department of Hydrobiology, School of Biology,
Leninskiye gory 1–12, Moscow, 119234
A. V. Drits
P.P. Shirshov Institute of Oceanology RAS
Russian Federation
36 Nahimovskiy pr., Moscow, 117997
Russian Federation
36 Nahimovskiy pr., Moscow, 117997
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Review
For citations:
Ilyash L.V., Belevich T.A., Drits A.V. SPATIAL DISTRIBUTION OF THE WHITE SEA PICOPHYTOPLANKTON IN THE BEGINNING OF THE SUMMER. Vestnik Moskovskogo universiteta. Seriya 16. Biologiya. 2018;73(3):160-165. (In Russ.)
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