THE REGULARITIES OF PHYTOPLANKTON FORMATION AT VARIOS BIOGENIC ELEMENTS AND ORGANIC MATTER CONCENTRATIONS

O. V. Kravtsova, V. I. Scherbak, M. I. Linchuk

Abstract


The seasonal dynamics of the concentration of nutrients in the form of inorganic nitrogen (NH4+, NO2, NO3-, ΣN), dissolved phosphorus, organic matter and the connection with the development of phytoplankton in waters with high content of total inorganic nitrogen (from 23.31 to 102.65 mg N/dm3) and its compounds (ammonia - from 8.42 to 76.60, nitrate - from 4.94 to 15.93, nitrite - from 0.077 to 4.35 mg N/dm3) and organic matter (from 8.00 to 21.92 mg O/dm3 by permanganate oxidation values and from 58.46 to 265.2 mg O/dm3 by dichromate oxidation values) were analyzed in paper. The peculiarity of the hydrochemical regime of the reservoirs was phenomenally high relations ΣN:P (133,54-12152,86) during the growing seasons. Found that response algal plankton communities such features hydrochemical regime is a simplification of the structure due to the predominance of representatives of departments Euglenophyta, Chlorophyta and Bacillariophyta, while Chrysophyta, Dinophyta, Charophyta and presented Cryptophyta 1-3 species. The response of phytoplankton to the high content of compounds of inorganic nitrogen is the increase in the number and biomass of green algae, and organic matter - eugenic algae.

THE REGULARITIES OF PHYTOPLANKTON FORMATION AT VARIOS BIOGENIC ELEMENTS AND ORGANIC MATTER CONCENTRATIONS 

Keywords


biogenic elements, inorganic nitrogen, dissolved phosphorus, phytoplankton, species diversity, abundance, biomass, seasonal dynamics, anthropogenic load

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DOI: https://doi.org/10.25128/2078-2357.19.1.5

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