Open AccessRole of plankton in the vertical flux in the East Siberian sea shelf
Author(s) -
A. V. Drits,
A. F. Pasternak,
М. Д. Кравчишина,
Е. Г. Арашкевич,
I. N. Sukhanova,
M. V. Flint
Publication year - 2019
Publication title -
okeanologiâ
Language(s) - English
Resource type - Journals
ISSN - 0030-1574
DOI - 10.31857/s0030-1574595746-754
Subject(s) - oceanography , flux (metallurgy) , phytoplankton , zooplankton , plume , plankton , environmental science , total organic carbon , continental shelf , sediment , atmospheric sciences , geology , ecology , chemistry , biology , nutrient , geomorphology , geography , organic chemistry , meteorology
Role of plankton in the vertical flux in the East Siberian Sea was studied in the 69 cruise of the RV Akademik Mstislav Keldysh in September 2017. Vertical fluxes were measured in sediment traps samples collected in the area of Indigirka river plume and in the marine shelf area. Mass vertical flux and particulate organic carbon flux varied from 80 to 530 mg/м2/d and from 16 to 49 mgС/м2/d, accordingly. Phytoplankton in sediment traps was dominated by cysts and spores of diatoms and dinoflagellates. Phytoplankton flux increased with depths from 0.220.33 to 1.21.3 мgС/м2/d. Fecal pellet fluxes (712 mgС/м2/d) was almost similar at two studied stations and did not change with depth. Zooplankton in the traps was dominated by houses of larvacean and carcasses of copepods Jashnovia tolli and Calanus glacialis Flux of zooplankton varied from 3 to 17 mgС/m2/d. The influence of the continental runoff reflected in a decrease of the proportion of planktonogenic components in the vertical flux of organic carbon. In the river plume area their total contribution to organic carbon flux did not exceed 30%; on the marine shelf it reached 80%.