102 Works

Lake Peipsi 1988 (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 1985 (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 2003 (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 1999 (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 2000 (Phytoplankton samples)

Reet Laugaste & Külli Kangur
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 1997 (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 2016 (Phytoplankton samples)

Marina Haldna, Olga Tammeorg, Kadi Palmik, Margus Voode, Kristel Panksep, Jüri Konoplitski, Kätlin Blank, Helle Mäemets, Arvo Tuvikene & 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 1964 (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 1981 (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 1962 (Phytoplankton samples)

Reet Laugaste & Maia Pork
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 2009 (Littoral samples)

Reet Laugaste & Helle Mäemets
Phytoplankton samples were picked with bottle from among reed stands or from above thick beds of submerged plants from the depth 20-30 cm, 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...

Lake Peipsi 2006 (Littoral samples)

Reet Laugaste
Phytoplankton samples were picked with bottle from among reed stands or from above thick beds of submerged plants from the depth 20-30 cm, 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...

Lake Peipsi 2002 (Littoral samples)

Reet Laugaste & Helle Mäemets
Phytoplankton samples were picked with bottle from among reed stands or from above thick beds of submerged plants from the depth 20-30 cm, 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...

Narva Reservoir 2017 (Littoral samples)

Marina Haldna, Jüri Konoplitski & Reet Laugaste
Phytoplankton samples were picked with bottle from among reed stands or from above thick beds of submerged plants from the depth 20-30 cm, 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...

Narva Reservoir 2007 (Littoral samples)

Reet Laugaste
Phytoplankton samples were picked with bottle from among reed stands or from above thick beds of submerged plants from the depth 20-30 cm, 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...

Narva Reservoir 2004 (Littoral samples)

Reet Laugaste
Phytoplankton samples were picked with bottle from among reed stands or from above thick beds of submerged plants from the depth 20-30 cm, 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...

Supplementary materials to the article \"Catchment soil characteristics predict organic carbon, nitrogen, and phosphorus levels in temperate lakes\"

Margot Sepp, Toomas Kõiv, Peeter Nõges, Tiina Nõges, Silvia E. Newell & Mark J. McCarthy
The supplementary material contains 6 tables. This study was funded by the Estonian Research Council grants PUTJD954, PRG709, and PRG1167, by the European Regional Development Fund through Estonian University of Life Sciences ASTRA project “Value-chain based bio-economy”, and by the European Union H2020 WIDESPREAD grant 951963 (TREICLAKE). The Estonian Ministry of Environment and the Estonian Environment Agency supported data collection in the national monitoring program.

Lake Peipsi 2006 (Phytoplankton samples)

Reet Laugaste, Külli Kangur & Aimar Rakko
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 2004 (Phytoplankton samples)

Reet Laugaste & Külli Kangur
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 1995 (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 1996 (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 1979 (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 2001 (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 1967 (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 1974 (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.

Registration Year

  • 2022
    5
  • 2021
    44
  • 2020
    17
  • 2019
    33
  • 2018
    3

Resource Types

  • Dataset
    102

Affiliations

  • Estonian University of Life Sciences
    6
  • Ghent University
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