Summary
All stations along the Swedish west coast had low total cell numbers and low biodiversity. Small cells dominated and the coccolithophore Emiliania huxleyi was found in highest amount at all stations except Å17 where the dinoflagellate Heterocapsa rotundata was the most common. A chlorophyll fluorescence maximum was found at Å17 at 25 meters depth and was mainly caused by the dinoflagellate Karenia mikimotoi*. The integrated chlorophyll concentrations were normal at all stations. The southwestern part of the Baltic Sea had a clear dominance of the diatom Dactyliosolen fragilissimus but several filaments of Aphanizomenon flosaquae were also present there. A. flosaquae was found in low amounts at almost all stations whereas only a couple of filaments of Nodularia spumigena* were found all together. The integrated chlorophyll concentrations from 0–10 meters were above normal at BCS III-10 and BY29. The 0–20 meters concentrations were within normal at all stations.