Algaware-November 2008
About AlgAware
SMHI carries out monthly cruises with R/V Argos in the Baltic and the Kattegat/Skagerrak. Results from semi quantitative microscopic analysis of phytoplankton samples as well as chlorophyll measurements are presented in brief in this report.
Abstract
Sampling was not done in open Skegarrak due to the weather conditions. At the coast (Släggö), the phytoplankton diversity had gone down in comparison to the last expedition. Diatoms still dominated though, the most abundant being Pseudo-nitzschia spp. and Skeletonema costatum complex. The situation in the Kattegat was similar, but the total numbers of cells were lower at the station N14. At Släggö, the chlorophyll a concentration was enhanced, but within average which was the case in the rest of the Skagerrak and Kattegat areas.
Small species dominated the phytoplankton flora in the Baltic Sea. In the Southern (BY2 and BY5) and Southeastern Baltic (BCSIII-10) cryptomonads, Pyramimonas spp. and the dinoflagellate Heterocapsa rotundata were the most common, and the haptophyte Chrysochromulina polylepis was absent. At the rest of the stations C. polylepis was found in varying cell numbers in addition to the species mentioned above.
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