Modeling photosynthesis and the growth of marine phytoplankton     

V. I. Zvalinsky  P. Ya. Tishchenko 《Oceanology》2016,56(4):527-539

The paper analyzes the most popular models of photosynthesis and growth of marine phytoplankton in the literature and demonstrates their limitations. A new approach to modeling is proposed and used to obtain new models of marine phytoplankton photosynthesis and growth. An important feature of the proposed models is their ability to describe coupled multisubstrate cyclical interactions typical of biochemical and physiological processes. As a first approximation, the mathematical models are represented by equations of nonrectangular hyperbolas. The models describe the stoichiometry of extraction of elements from the medium, whatever the degree of their limitation, an important feature in describing biogeochemical cycles of elements. This stoichiometry is governed by measurable internal parameters of an organism (substrate parameters) and can be a key cause of stoichiometric formation of elements in the ambient medium, described, for example, by the Redfield ratio. The substrate constants are fundamental characteristics of the models, which form “automatically” in the construction of model equations in arbitrary units.  相似文献   

Hypoxia of bottom waters of the Razdolnaya River estuary     

Tishchenko  P. Ya.  Semkin  P. Ju.  Tishchenko  P. P.  Zvalinsky  V. I.  Barabanshchikov  Yu. A.  Mikhailik  T. A.  Sagalaev  S. G.  Shvetsova  M. G.  Shkirnikova  E. V.  Shulkin  V. M. 《Doklady Earth Sciences》2017,476(2):1207-1211

The hypoxia of the bottom waters in the Razdolnaya River estuary was observed for the first time in September 2014 during the survey. It is formed as in the seaward part: oxygen is absorbed as a result of destruction of excessive phytoplankton biomass that settles to the bottom and is synthesized on the upper horizon. The high value of primary production in the riverine part of the estuary was caused by the pycnocline formed. Thus, phytoplankton “blooms” above and undergoes destruction beneath the pycnocline. Oxygen is distributed symmetrically in both parts of the estuary with respect to a bar: similar oxygen concentrations, which are maximum on the surface and minimum at the bottom, 300 and <60 μm/L, respectively, are recorded. The anomalies of hydrochemical parameters that have been formed during this process are sharply different in the two parts of the estuary, which most vividly manifests itself in the N/P value and the partial pressure of carbon dioxide pCO₂. The causes of this unique situation are discussed.

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Estimation of Primary Production in the Northwestern Part of the Sea of Japan by Ship- and Satellite-Based Observations     

Zvalinsky  V. I.  Lobanova  P. V.  Tishchenko  P. Ya.  Lobanov  V. B. 《Oceanology》2019,59(1):37-48

Oceanology - The study analyzes data of ship-based observations on 45 stations performed aboard the R/V&nbsp;Akademik M.A. Lavrentyev on cruise 33 May 7–18, 2004, in the northwestern part...  相似文献