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Kattegat were caused by diatoms. The heterotrophic species Ebria tripartita was abundant at Anholt E. In the picture the species seems to be feeding on a diatom chain. The flagellate Eutreptiella braarudii was present at Anholt and Släggö. 3The Baltic Sea Due to the weather conditions, only three of the Last updated: Mar 29, 2018

less so in the Kattegat. At Å17 in the Skagerrak and Anholt E in the Kattegat, the integrated chlorophyll concentrations from 0-10 m were above normal for this month. The cyanobacteria season was finally over in the Baltic Sea. The phytoplankton diversity was low and consequently the chlorophyll Last updated: Nov 02, 2016

nordenskioeldii dominated the phytoplankton samples. P. delicatissima-group was found with cell numbers above its critical limit at Å17 and N14. Some clones of this genus can produce AST (Amnesic Shellfish Toxin). No AST have however been reported in Swedish waters. In the Baltic Sea the number of species and the Last updated: Apr 23, 2014

by the sinking bloom of the flagellate Pseudochattonella spp.*. The other fluorescence peaks in the Baltic Sea were caused by the spring bloom in different stages. The dinoflagellate Peridiniella catenata which is a typical Baltic spring bloom species, was abundant. Rather high cell numbers of the Last updated: May 09, 2017

low and no diatoms were found in the samples. Diatoms were present in the area around Bornholm with low cell numbers. The integrated (0-20m) chlorophyll a concentrations were low in the Baltic Sea and below average at many stations. In the Kalmar Sound, the chlorophyll concentrations were rather high. Last updated: Apr 23, 2014

This report covers the Baltic Proper only as this expedition is reporting from the Finish cruise. All analyses have been performed onboard the ship and the main focus was to follow the cyanobacterial surface accumulations and blooms. Summary of surface accumulations The warm air temperature and the Last updated: Aug 10, 2015

community. The Baltic Sea Fig.5 All three groups of filamentous cyanobacteria were found at all stations in the Baltic Sea but in different proportions. The small curly filaments belong to the genus Dolichospermum. The large curly filament with light streaks in the middle is the toxin producing Nodularia Last updated: Jul 19, 2017

Baltic Sea, filamentous cyanobacteria were abundant and surface accumulations were observed at REF M1V1, BY15 and at BY32. The dinoflagellate Prorocentrum minimum* was abundant at several stations, the highest cell number was found at BY15. The integrated chlorophyll a concentrations (0-10 meters) were Last updated: Oct 04, 2016

In the coastal area of the Skagerrak the nutrient- and cell concentrations were low compared to the open Skagerrak where the diatom spring bloom was ongoing. In the Baltic Sea the cell density was generally low but at the Arkona Basin the spring bloom had started. The integrated (0-10 m Last updated: Apr 01, 2015

spring bloom. The diversity and cell concentrations in the Baltic Sea were low at all stations. The diatom Skeletonema marinoi was found in high numbers at the eastern stations whereas small flagellates dominated at the other stations. The integrated (0-10 m) chlorophyll a concentrations were low which Last updated: Mar 09, 2016