33 Works

Lake Peipsi 2002 (Phytoplankton samples)

Reet Laugaste
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...

Lake Peipsi 1986 (Phytoplankton samples)

Reet Laugaste
Method: Up to 1988 the samples were preserved with formaldehyde (not neutralised), and lots of samples were spoiled: sample sediment was flaked, stuck together, or rusty. By this reason, a number of results of countings are not representative.

Lake Peipsi 1983 (Phytoplankton samples)

Reet Laugaste
Method: Up to 1988 the samples were preserved with formaldehyde (not neutralised), and lots of samples were spoiled: sample sediment was flaked, stuck together, or rusty. By this reason, a number of results of countings are not representative.

Lake Peipsi 1991 (Phytoplankton samples)

Reet Laugaste
Methods: Samples were in most cases concentrated by precipitation up to 15 ml. Count was made on striped microscope slides within volume 0,1 ml. Microscopes: MBI-3 (magnification 15x20 and 15x40) and Jenaval (7x40). Macroscopic colonies of Gloeotrichia echinulata were counted visually in 500 ml measuring cylinder.

Lake Peipsi 1982 (Phytoplankton samples)

Reet Laugaste
Method: Up to 1988 the samples were preserved with formaldehyde (not neutralised), and lots of samples were spoiled: sample sediment was flaked, stuck together, or rusty. By this reason, a number of results of countings are not representative.

Lake Peipsi 2018 (Phytoplankton samples)

Kätlin Blank, Olga Tammeorg, Kadi Palmik-Das, Sergei Fedorov, Sofia Tarasova & Reet Laugaste
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...

Lake Peipsi 2012 (Phytoplankton samples)

Olga Buhvestova-Tammeorg, Kristel Panksep, Kadi Palmik, Sergei Fedorov, Sofia Tarasova & Reet Laugaste
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...

Lake Peipsi 2013 (Phytoplankton samples)

Kristel Panksep, Ave Pent, Marina Haldna, Kätlin Blank & Reet Laugaste
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...

Registration Year

  • 2019
    33

Resource Types

  • Dataset
    33