102 Works

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 1963 (Phytoplankton samples)

Reet Laugaste, Viive Kõvask & 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.

Consumption and wind production time series data

Andres Annuk, Mart Hovi, Janar Kalder & Maido Märss
Consumption data are measured in the real household for two weeks and then multiplied to the whole year. This is an average family with 4 members. Consumption behavior is quite similar whole the year. Production graph is measured in real wind generator as described in the paper and when scaled to certain annual production.

Lake Peipsi 2000 (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 2001 (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 2010 (Littoral samples)

Reet Laugaste, Helle Mäemets & Kristel Panksep
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 2007 (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...

Combined Acute Ozone and Water Stress Alters the Quantitative Relationships between O₃ Uptake, Photosynthetic Characteristics and Volatile Emissions in Brassica nigra

Kaia Kask, Eve Kaurilind, Eero Talts, Astrid Kännaste & Ülo Niinemets
Ozone and water stress effects on Brassica nigra volatile organic compounds emission (VOC) and photosynthetic characteristics. VOCs were collected on adsorbent cartridges and analyzed with GC-MS. Ozone exposures were 250 ppb O₃ for well-watered and 550 ppb O₃ for well-watered and water-stressed B. nigra plants.

Lake Peipsi 2018 (Littoral samples)

Kristel Panksep & 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 2011 (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 2016 (Littoral samples)

Reet Laugaste & Kristel Panksep
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 2003 (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 data to the article \"The impact of climate change and eutrophication on phosphorus forms in sediment: Results from a long-term lake mesocosm experiment\"

Katrin Saar, Peeter Nõges, Martin Søndergaard, Maria Jensen, Charlotte Jørgensen, Kasper Reitzel, Erik Jeppesen, Torben L. Lauridsen & Henning S. Jensen
The supplementary material contains 7 tables and 2 figures.Katrin Saar study visit to SDU was supported by ESF DoRa Programme Activity 6 and SA Archimedes and by Centre for Lake Restoration, a Villum Centre of Excellence. Data analysis for the present paper was supported by the European Union H2020 WIDESPREAD grant 951963 (TREICLAKE) and by the Estonian Science Foundation grant PRG1167. Erik Jeppesen was supported by the TÜBITAK program BIDEB2232 (project 118C250), and Erik Jeppesen,...

Supplementary data to the article \"Nitrate as a predictor of cyanobacteria biomass in eutrophic lakes in a climate change context\"

Fabien Cremona, Burak Öglü, Mark J. McCarthy, Silvia E. Newell., Peeter Nõges & Tiina Nõges
Supplementary material: empirical model terms for the biomass of cyanobacteria (VO_Bcyan) and nitrate concentration (VO_NO3) in Lake Võrtsjärv, using measured nitrate concentration of tributaries Väike Emajõgi (oVema_), Tänassilma (oTana_), Õhne (oOhne_) and Tarvastu (oTarv_). This research was supported by Estonian Research Council grants PSG32, PRG709, and PRG1167, by the European Regional Development Fund through EstonianUniversity of Life Sciences ASTRA project “Valuechain based bio-economy”, by the European Union H2020 WIDESPREAD grant 951963 (TREICLAKE) and by the...

Lake Peipsi 2013 (Littoral samples)

Reet Laugaste, Helle Mäemets & Kadi Palmik
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 2011 (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 2008 (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 2003 (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 2004 (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 2011 (Phytoplankton samples)

Olga Buhvestova, Külli Kangur, Kristel Panksep & 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 2017 (Phytoplankton samples)

Marina Haldna, Jüri Konoplitski, Kätlin Blank, Kadi Palmik & 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 2008 (Phytoplankton samples)

Reet Laugaste, Kristel Panksep, Olga Buhvestova, Külli Kangur, Kadi Palmik, Ave Pent, Kätlin Blank & Kai Ginter
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 1966 (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 1998 (Phytoplankton samples)

Reet Laugaste & Aimar Rakko
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 1971 (Phytoplankton samples)

Ervin Pihu & 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
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    17
  • 2019
    33
  • 2018
    3

Resource Types

  • Dataset
    102

Affiliations

  • Estonian University of Life Sciences
    6
  • Ghent University
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