Transformations of biogenic substances in Tatar Strait water (the Sea of Japan): Analysis of mathematical modeling results |
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Authors: | A V Leonov V M Pishchal’nik O V Chicherina |
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Institution: | 1.Institute of Oceanology,Russian Academy of Sciences,Moscow,Russia;2.Sakhalin State University,Yuzhno-Sakhalinsk,Russia |
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Abstract: | The state of the marine environment (the temperature, light intensity, transparency, biogenic load) in Tatar Strait was assessed
based on mean annual data from literary sources and with the use of GIS “Sakhalin Shelf.” The entire strait was divided into
three regions (northern, southwestern, and southeastern), and water exchange between them for each month was estimated by
using Bergen Oceanic Model. The information about the state of the marine environment and water exchange characteristics was
used as input data for a hydroecological model, which enabled the assessment of annual variations of biogenic substance concentrations
and biomasses of microorganisms (heterotrophic bacteria, three groups of phytoplankton, and two groups of zooplankton) in
the strait regions chosen. The development conditions of microorganism biomasses within the year can be characterized by their
activity indices (specific growth rates), the values of internal fluxes of biogenic substances, and calculated bioproductivity
values. The calculated biogenic substance concentrations and phytoplankton bioproductivity values showed good agreement with
the estimates for the Sea of Japan and Tatar Strait available from the literature. |
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