Materials and Methods (revised):
Water bottle sampling between June 5th and June 12th, mostly in the morning:
Determination within half a year after sampling:
Taxa and species: (Species were grouped into 7 main categories, based on size.)
Edler, L. 1979. Recommendations on methods for marine biological studies in the Baltic Sea. Phytoplankton and chlorophyll. Baltic Marine Biologists Publ. 5: 1-39.
Helcom 1988. Guidelines for the Baltic Monitoring Programme. The third stage. Part D. Biological Determinands. Baltic Sea Environment. Proceedings 27 D. Helsinki Commission. 161 pp.
Utermöhl, H. 1958. Zur Vervollkommnung der quantitativen Phytoplankton-Methodik. Mitt. int. Verein. theor. angew. Limnol. 9: 1-38.
Willén, T. 1962. Studies on the phytoplankton of some lakes connected with or recently isolated from the Baltic. Oikos 13: 169 - 199.
Baltic Sea Research
D18119 Rostock - Warnemünde
Lutz Postel, 28-3-01 sample analysis by Susanne Busch