Whole Curonian Lagoon in the southeast Baltic Sea during the period 1980-1993 (data set limits: 54 54 - 55 44N; 20 37 - 21 16E); Northern part of the Curonian Lagoon since 1994 (data set limits: 55 16 - 55 44N; 21 01 - 21 17E)

Bacteria generic abundance in water bodies; Bacteria taxonomic abundance in water bodies

Discrete water samplers; sieves and filters; fluorescence microscopes

The aim of the researches is to study the bacterioplankton state, interannual changes in the bacterial concentration in the Curonian Lagoon. Data of bacterioplankton in the Curonian Lagoon are obtained during the complex seasonal ecological surveys on 'Gintaras' cutter. Water samples in the Curonian Lagoon are taken from the surface and near-bottom layers. ZoBell modified sampler is used for this purpose. The investigations consist of determination of total bacterial number, their biomass, and concentration of heterotrophic, oil-oxidizing and coliform bacteria. From 1980 to 1993 the total abundance of microorganisms was determined by the method of Razumov A.S. and since 1993 by using the accepted international HELCOM methods. Since 1980 investigations have been carried out in a wide net of stations in the whole Curonian Lagoon (data set limits: 54 54 - 55 44N; 20 37 - 21 16E). Since 1994 the researches have been carried out only in the North Lagoon which belongs to Lithuania. The data are fully quality controlled. Systematic certification of laboratories, participation in an international intercalibrations, internal control, introduced managing system for researches' quality, use of high quality reagents determine quality of data. All data is stored in archive (written form) and is saved on hard disk.

Dr. Z. Stukova, R. Lesyte (1998) Long-term bacterioplankton dynamics in the different regions of the Kurshiu Marios Lagoon and south-eastern Baltic coastal waters / The environmental status of the Baltic Sea and Kurshiu Marios Lagoon (Articles in Lithuanian with English summaries), Virginija Cizauskiene; Dr. Z. Stukova (2008) Eutrophication and changes of bacterioplankton abundance in the different regions of the Baltic Sea and the Curonian Lagoon / Monograph: The Baltic Sea and its problems (Articles in Lithuanian with English summaries), N.Remeikaite, R.Nikzentaitiene; Z. Stukova (1996) Bacterioplankton in the Kurshiu Marios Lagoon in the south-eastern Baltic coastal waters. Summary of doctoral dissertation. Institute of Ecology, Lithuania, ; Z. Stukova, A. Jasinskaite (1997) Environmental conditions and long-term bacterioplankton dynamics in the Kurshiu Marios Lagoon/Proceedings of the 14th Baltic Marine Biologists Symposium., Estonia, ; Z. Stukova (1997) Evaluation of waters quality in the Kursiu Marios Lagoon and in the South-eastern Baltic coastal waters, according to sanitary-microbiological parameters/Proceedings of the 15th Baltic Marine Biologists and ECSA 27 Symposium, Finland, ; Z. Stukova (1998) Eutrophication and changes of bacterioplankton abundance in the Kurshiu Marios Lagoon/Monograph in Systems Ecology, Volume 2, Klaipeda University, Lithuania,

Department of Marine Research of the Environmental Protection Agency
Taikos Av. 26
Klaipeda

LT-91149
Lithuania