Lake Peipsi 2016 (Phytoplankton samples)
Date
2016Author
Haldna, Marina (Leg.)
Tammeorg, Olga (Leg.)
Palmik, Kadi (Leg.)
Voode, Margus (Leg.)
Panksep, Kristel (Leg.)
Konoplitski, Jüri (Leg.)
Blank, Kätlin (Leg.)
Mäemets, Helle (Leg.)
Tuvikene, Arvo (Leg.)
Laugaste, Reet (Det.)
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Method: Phytoplankton samples were preserved in Lugol’s (acidified iodine) solution and counted under an inverted microscope (Utermöhl, 1958). 3 ml of preserved sample was settled overnight and counted in random fields or transects. Biovolumes of algal cells, colonies and/or filaments were calculated using assigned geometric shapes dimensions, and converted to biomass assuming the specific density of 1 g cm-3 in accordance with Edler (1979). Approved by CEN on 14 July 2006 “Water quality - Guidance standard on the enumeration of phytoplankton using inverted microscopy (Utermöhl technique)” (CEN 15204, 2006) European Standard EN 15204:2006 Utermöhl, H., 1958. Zur Vervollkommnung der quantitativen Phytoplankton-Methodik. Mitteilungen der Internationale Vereinigung für Theoretische und Angewandte Limnologie 9, 1- 38. Edler, L. (ed.), 1979. Recommendations on methods for marine biological studies in the Baltic Sea. Phytoplankton and chlorophyll. Baltic Marine Biologists WG 9.