In the Skagerrak, the phytoplankton samples were rather low in diversity and fluorescence maxima were dominated by the dinoflagellate Ceratium tripos. The Kattegat fluorescence maxima samples were dominated by diatoms, except at Fladen where several Ceratium species dominated.
In the Baltic, the cyanobacteria surface accumulations had been turned down in the water by wind and waves. Aggregations and filaments of cyanobacteria were abundant at all stations in all samples analysed, both surface samples and integrated (0-10m) samples. Nodularia spumigena* dominated at most stations. Considering this information the prediction is that calmer weather will lead to new surface gatherings over the whole Baltic areas covered by the SMHI expedition.