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Hydrobiological Journal

ISSN Print: 0018-8166
ISSN Online: 1943-5991

Hydrobiological Journal


7 pages

The Influence of the Duration of Exposition on the Indices of Phytoplankton Primary Production in Eutrophic Water Bodies Using the Bottle Method in the Oxygen Modification

V. I. Shcherbak
Institute of Hydrobiology, National Academy of Sciences of Ukraine, Kiev

ABSTRACT

The bottle method with the daily exposition is a reliable tool for determining the total primary production in eutrophic water bodies, if the biomass of phytoplankton does not exceed 15.0 g/m3. The implementation of this method with the daily exposition at a higher biomass of phytoplankton introduces errors into the measurements. At higher biomass parameters of phytoplankton (more than 15.0 g/m3), the values of the total primary production are 1.74-2.78 times lower than the integral values obtained by summing the data of 4-hour exposures, The data obtained are statistically valid.