It has been shown that in the Sevastopol Bay during the year primary production and chlorophyll "a" created by picoplankton (0.45-2.5 µm) consisted on the average 20-44% of total production. It was approximately a half of the level for oligotrophic waters of the ocean. Picoplankton of waters studied is represented by eucaryotes, cell diameter of which is, as a rule, about 2-3 µm. Contribution of the finest fraction of phytoplankton (0.43-0.85 µm) to primary production and con¬tent of chlorophyll "a" was insignificant (0-4%).

Supplement to: Stel'makh, Lyudmila V (1988): The contribution of picoplankton to primary production and the content of chlorophyll "a" in eutrophic waters as exemplified by Sevastopol Bay. Oceanology, 28(1), 95-99