Algae report number 9, 2019

Type: Report
Author: Marie Johansen och Ann-Turi Skjevik


Due to strong winds the Skagerrak could not be sampled. N14 Falkenberg and Anholt E in the Kattegat were sampled although Anholt E was visited only once during the cruise. The total cell numbers and the biodiversity were low at both stations and were dominated by small cells. The coccolithophorid Emiliania huxleyi was found with the highest cell numbers. Different species of the order cryptomonadales were also common. Different species of the dinoflagellate genus Ceratium were most common of the larger cells. Naked dinoflagellates were also common at N14 Falkenberg. The integrated chlorophyll concentrations were within normal for this month. In the southwestern Baltic, the integrated chlorophyll (0-10 and 0-20 m) concentrations were above normal for this month which mainly was caused by diatoms. Even in the southeastern Baltic Proper as well as at BY32 (0-20 m), chlorophyll concentrations were elevated, but the cause was not obvious here considering the generally low cell numbers.