Algae report number 6, 2011

Type: Report
Author: Marie Johansen


This report only comprises results from analysis of phytoplankton. An extended version containing results from chlorophyll a measurements will be available in the beginning of next week. A quite scarce community was found at the outer station Å17 in the Skagerrak area while the inner station Släggö presented a quite diverse community. Small flagellated species such as cryptomonads and the genus Chrysochromulina dominated at both stations. The diversity was quite high in the Kattegat area at the outer station N14 and at the later sampling occasion at the more inner site Anholt E. The first sampling occasion at Anholt E presented on the contrary a quite low pytoplankton diversity. Small flagellates dominated the phytoplankton community on all occasions. The phytoplankton community at all sampling stations in the Baltic Sea were dominated by small flagellates and at most stations by the genus Chysochromulina. The discolouring of the water that was observed from the boat could only be confirmed from one of the extra watersamples that was taken at the surface. High abundance of Aphanizomenon flos-aqua in surface water could thereby be confirmed at the southern station BY2. To follow the surface accumulations of cyanobacteria in the Baltic Sea by satellite interpretations and high resolution images: