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simultaneously with the heterotrophic dinoflagellate P. danica, causing elevated chlorophyll concentrations. In the Baltic Sea, spring bloom was observed at BY5 in the southern and BCSIII-10 in the eastern Proper Baltic with high cell numbers of diatoms and the dinoflagellate Peridiniella catenata. The species Last updated: Apr 24, 2019

Nodularia spumigena* were present at many stations and Dolichospermum sp. were found at BY38 and RefM1V1. As in Skagerrak and Kattegat, the chlorophyll concentrations in the Baltic Sea were low but within normal for June. Last updated: Jun 25, 2019

phytoplankton community in the Baltic Sea was in general dominated by Mesodinium rubrum, small cryptomonads and the genus Dinobryon. The potentially toxic genus Dinophysis was present at all stations. The integrated (0-20m) chlorophyll a concentrations were varying from lower than normal to normal for this Last updated: Apr 23, 2014

were low but within normal for this month. The species diversity and total cell numbers were low at both stations at the Kattegat coast. The dinoflagellate Dinophysis acuta which has been rare in Swedish waters for some years was found at Anholt E. 3The Baltic Sea BY2 16th of September The Last updated: Oct 03, 2019

fluorescence peak at Å17. 3The Baltic Sea BY2 19th of August There were high cell numbers of the diatom Dactyliosolen fragilissimus, and Cerataulina pelagica and Pseudosolenia calcar- avis. Low amounts of the filamentous cyanobacterium Aphanizomenon flosaquae were found. Unidentified naked dinoflagellates Last updated: Sep 05, 2019

integrated (0-10 m and 0-20 m) chlorophyll a concentrations were within normal for the month at most stations, although just above normal at the stations close to the southern Skagerrak coast. Both the cell numbers and species diversity was generally low in the Baltic Sea. The only exception was the coastal Last updated: Nov 26, 2018

low in the Baltic Sea. Species from the diatom genus Coscinodiscus were common or present in all regions of the Baltic Sea. The integrated (0-10 m) chlorophyll a concentrations were normal for this month in the Skagerrak, the Kattegat and the Baltic Sea. Last updated: Nov 10, 2014

the Kattegat and was found in somewhat higher cell numbers in the Skagerrak samples. The potentially toxic dinoflagellate Azadinium spp was found in the Skagerrak where the National food agency`s toxin samples also had azaspiracids in them this week. In the Baltic Sea the phytoplankton diversity was Last updated: Oct 31, 2018

A new cooperation between SMHI and the Finnish SYKE has started. This is the first AlgAware with data from samplings with the Finnish ship R/V Aranda. All phytoplankton samples from the Skagerrak, the Kattegat and the Baltic Sea contained low species diversities and all of the cell counts were low Last updated: Apr 23, 2014

Sea The phytoplankton situation was modest in the Baltic Sea and besides the species lists there is nothing more to report this month. Colonies of pico cyanobacteria were abundant at BY15 and BY25. Phytoplankton analysis and text by Ann-Turi Skjevik 4Selection of observed species Anholt E N14 Släggö Å Last updated: Oct 13, 2017