The species diversity was rather high at most stations along the Swedish west coast. The total cell numbers were rather low. Diatoms dominated and the genus Pseudo-nitzschia* was found in then highest concentrations. The coccolithophorid Emiliania huxleyi was abundant at most stations.
The integrated (0-10 m and 0-20 m) chlorophyll a concentrations were within normal for the month at most stations, although just above normal at the stations close to the southern Skagerrak coast.
Both the cell numbers and species diversity was generally low in the Baltic Sea. The only exception was the coastal station REF M1VI, where high cell numbers were recorded. At REF M1V1 the mixotrophic ciliate Mesodinium rubrum was abundant as well as different cells of cryptomonads. A few cyanobacteria filaments were present at some Baltic stations.
The stations east of Gotland had slightly lower integrated (0-10 m and 0-20 m) chlorophyll a concentrations than what is normal for this month.