Open AccessPicophytoplankton distribution at the Ob section and in western part of the Kara sea
Author(s) -
Т. А. Белевич,
Т. А. Белевич,
L. V. Ilyash,
Л.В. Ильяш,
А. Б. Демидов,
А. Б. Демидов,
М. В. Флинт,
М. В. Флинт
Publication year - 2019
Publication title -
okeanologiâ
Language(s) - English
Resource type - Journals
ISSN - 0030-1574
DOI - 10.31857/s0030-1574596964-973
Subject(s) - photic zone , phytoplankton , chlorophyll a , plankton , oceanography , abundance (ecology) , estuary , biomass (ecology) , environmental science , spatial distribution , chlorophyll , biology , ecology , botany , nutrient , geography , geology , remote sensing
The spatial distribution of picophytoplankton abundance, biomass, chlorophyll a and contribution of picoalgae to total chlorophyll a was studied in the outer Ob estuary with an adjacent shelf and in the western part of the Kara Sea. In August-September picophytoplankton abundance and biomass varied from 0.1 to 17.3106 cell/l and from 0.06 to 9.20 mg С/m3, respectively. Cyanobacteria dominated in plankton picofraction, its contribution to total picophytoplankton biomass did not exceed 11%. The highest contribution of picophytoplankton to the total phytoplankton abundance was observed at a lower (11 mg/m2) chlorophyll a concentration in the euphotic layer. The spatial heterogeneity of picoforms contribution was determined by the silicon concentration.