Transformations of nutrients in the Northeastern waters of the Sakhalin Shelf: An analysis of mathematical modeling results

  • A. V. Leonov Shirshov Institute of Oceanology, Russian Academy of Sciences
  • V. M. Pishchal’nik Sakhalin State University
  • V. I. Petukhov Far Eastern Federation University
  • O. V. Chicherina Shirshov Institute of Oceanology, Russian Academy of Sciences
DOI 10.29006/1564-2291.JOR-2018.46(2).10
Keywords models for analysis of oceanological data, concentrations of nutrients; organism biomasses of lower trophic links – heterotrophic bacteria, three main groups of phytoplankton, two groups of zooplankton (herbivorous and predatory), parameters of organism activity (specific growth rate, biomass turnover time, bioproduction)

Abstract

Transformations of nutrients in marine environments of the Northeastern part of Sakhalin Shelf were studied in Regions 1–4. Three electronic devices were used for the analysis of the oceanographic information:
1. The GIS «Sakhalin Shelf» (to obtain data on the state of thermohaline parameters of sea waters).
2. The oceanic dynamic model of the Bergen University (to estimate the rates of water mass transport across boundaries of regions).
3. The hydroecological CNPSi-model (to calculate the chemical and biological characteristics and estimate qualitatively the features of the marine environment biohydrochemistry in various regions of Northeastern part of Sakhalin Shelf.
In this study the seasonal dynamics of the concentrations of organic and mineral substances of biogenic elements (N and P), and organism biomasses (heterotrophic bacteria, three groups of phytoplankton, and two groups of zooplankton are presented, which were reproduced on the basis of the long-term monthly values of the marine environment parameters (temperature, light intensity, transparency of water environment, biogenic load, water exchange parameters). Indicated organisms are involved in the substance transformations and providing their turnover in the water environment. An analysis of the changes in the nutrient concentrations allowed us to characterize the conditions during a year for the explanations of biomass organism development and change in values of their activity parameters (on the base of specific biomass growth rates and bioproductions).

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Published
2018-11-18
Issue
Vol 46 No 2 (2018): Journal of Oceanological Research
Section
Marine geology, geophysics and geochemistry

Transfer of copyrights occurs on the basis of a license agreement between the Author and Shirshov Institute of Oceanology, RAS

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