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genus Tripos. This genus was especially common in the fluorescense peaks found at several stations along the Å-transect and at Å17 Tripos macroceros dominated. Baltic Sea Small sporadic aggregations were already seen in the Sound. In the southwestern parts of the Baltic proper grains were noted in the Last updated: Jul 19, 2021

present. The integrated chlorophyll concentrations, 0-10 and 10-20 m, were within normal for this month. Phytoplankton analysis and text Ann-Turi Skjevik and Maria Karlberg Figure 2. The large diatoms Coscinodiscus centralis (left) and Chaetoceros castracanei (right) were quite numerous in the Baltic Sea Last updated: Nov 05, 2021

cells from various phytoplankton groups were abundant in the Baltic Sea samples; Arrow Monoraphidium sp., arrowhead Pyramimonas sp. and star Pseudanabaena sp. Photo Ann-Turi Skjevik. Phytoplankton analysis and text Ann-Turi Skjevik and Marie Johansen 4Selection of observed species Anholt E Anholt E N14 Last updated: Sep 10, 2021

The cell concentrations were low in all sampling stations at the Swedish West coast and in the Baltic Sea. The species diversity was higher in the Kattegat and Skagerrak areas than in the Baltic Sea. The species diversity was highest among the dinoflagellates although it seems like the diatom Last updated: Apr 23, 2014

Despite the great secchi depth, quite high phytoplankton cell numbers and many species were found at the Skagerrak coast. In the open sea area, phytoplankton were more scarce. In the Kattegat the diatom Dactyliosolen fragilissimus and the cyanobacterium Anabaena sp. were abundant. In the Baltic Sea Last updated: Apr 23, 2014

found in the North Sea were found. The integrated (0-20 m) chlorophyll concentrations were above normal at N14 Falkenberg and at both stations in the Skagerrak for this month. The integrated (0-10 m) chlorophyll concentrations that coincide with the depth of the hose samples were above what is normal at Last updated: Nov 04, 2020

the Baltic Sea, besides this there was nothing to report. The integrated (0-20 m) chlorophyll a concentrations were low, but within normal for this month in all sampling areas. This report is a shortened version because of lack of events in the phytoplankton world. Last updated: Apr 23, 2014

Tripos. This genus was especially common in the fluorescens peaks found at about 20m at a couple of stat-ions. Baltic Sea No large surface accumulations were noted in the south of the Baltic. The wind and waves kept the filaments disper-sed in the watercolumn. The small grains of aggregations that were Last updated: Jul 19, 2021

The phytoplankton diversity and total cell numbers were relatively low as can be expected for the season. The only exception was Å17 that had quite high biodiversity. Diatoms dominated at all stations except at Släggö where dinoflagellates were more abundant. Overall the diatom Pseudo Last updated: Dec 01, 2020

. The smaller cells had a dominance of Eutreptiella spp. No results of chlorophyll were available for this station. Figure 2 Spring bloom dominated by the diatom Skeletonema marinoi was observed in the southwestern Baltic Sea. Photo M. Johansen. Figure 3 A few filaments of the cyanobacteria Last updated: Apr 06, 2021