2. Methods
2.1. Field studies
Field observations of hydrophysical and hydrochemical parameters
and quantitative and qualitative characteristics of the phytoplankton
community were carried out on-board the research vessels “Akvanavt”
and “Ashamba”. Hydrophysical measurements and sampling were performed
at stations of a standard section fromGolubaya Bay to the center
of the sea (Fig. 1). The stations were located at depths of 30 m, 50 m
(middle shelf), 500 m (slope) and 1000 m. In cases where the RV
“Akvanavt” was used for observations, the section was lengthened to
the center of the sea. Studies were conducted regularly, at least twice
a month for the period May–June.