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Hydrobiological Journal
SJR: 0.227 SNIP: 0.901 CiteScore™: 0.5

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

Hydrobiological Journal

DOI: 10.1615/HydrobJ.v35.i4.80
pages 78-95

Mathematical Modelling of Nitrogen Circulation in Freshwater Ecosystems

V. A. Dobrynskiy
Institute of Hydrobiology of National Academy of Sciences of Ukraine, Kyiv, Ukraine
I. V. Rogal
Institute of Hydrobiology National Academy of Sciences of Ukraine Kiev, Ukraine


A mathematical model of nitrogen circulation inside a freshwater ecosystem is proposed. The model consists of seven components. They are: water soluble organic and inorganic nitrogen compounds, nitrogen of detritus, nitrogen of phytoplankton and three types of bacterial nitrogen. Using this model, special features of nitrogen circulation inside oligotrophic lakes and other freshwater oligotrophic reservoirs are studied. It is shown that in the given case processes of biotransformation of nitrogen substances, which are connected with phytoplankton and bacteria, run independently one from another.

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