Spatial Variability of the Species Composition, Abundance,
and Productivity of the Phytoplankton in the White Sea
in the Late Summer Period

L. V. Ilyasha, I. G. Radchenkoa, L. L. Kuznetsov†, b, A. P. Lisitzync, D. M. Martynovad,
A. N. Novigatskiy
c, and A. L. Chul’tsovae

a Moscow State University, Biological Faculty, Moscow, Russia

b Russian Federal Research Institute of Fisheries and Oceanography (VNIRO), Moscow, Russia

c Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia

d Zoological Institute, Russian Academy of Sciences, St. Petersburg, Russia

e Shirshov Institute of Oceanology, Northwestern Branch, Russian Academy of Sciences, Archangelsk, Russia


Received March 2, 2009; in final form, June 16, 2009

Abstract—The species composition, cell concentration (N), and biomass (B) of the phytoplankton, as well as
the chlorophyll a (Chl a) concentration, primary production (PP), and the concentrations of the dissolved inor-
ganic micronutrients (phosphorus, silica, nitrogen as nitrite), were estimated for Kandalaksha Bay (KB), Dvina Bay
(DB), and the basin (Bas) of the White Sea in August of 2004. The micronutrient concentrations were lower com-
pared to the average long-term values for the summer period. The Chl a concentration varies from 0.9to 2.0 mg/m3
for most of the studied areas, reaching up to 7.5 mg/m3 in the Northern Dvina River estuary. The surface water layer
of the DB was the most productive area, where the PP reached up to 270–375 mg C/(m3 day). The phytoplankton
biomass varied from 11 to 205 mg C/m3 with the highest values observed in the Bas and DB. Three groups of
stations were defined during the analysis of the phytoplankton’s species composition similarity. The dinoflagel-
lates Dinophysis norvegica and Ceratium fusus were particular to the phytoplankton assemblages in the KB;
the diatom Ditylum brightwellii was particular to the upper and central parts of the DB. These three phytoplank-
ton species were less abundant in the Bas.

DOI: 10.1134/S000143701101005X

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