Most stations along the Swedish West coast had a domination of small cells. The coccolithophore Emiliania huxleyi was common at all stations and even dominated in cell numbers at Å17. In Kattegat remnants of the spring bloom could be seen with higher cell numbers of the diatoms Skeletonema marinoi and Guinardia delicatula. The integrated chlorophyll concentrations were low but within normal for the month.
The cell abundance and biodiversity was generally quite low at most stations in the Baltic Proper. Low to moderate filaments of the cyanobacteria Aphanizomenon flosaquae was found at all stations. The potentially toxic dinoflagellate genus Dinophysis* was found in relatively high numbers at a few stations. The integrated chlorophyll concentrations were low and sometimes even below normal for the month.