INDICATORS OF BIOHYDROCHEMICAL PORTRAIT OF THE WHITE SEA: INTERNAL / EXTERNAL FLUXES OF BIOGENIC SUBSTANCES, BALANCES OF N AND P

  • A. V. Leonov Shirshov Institute of Oceanology, Russian Academy of Sciences
  • L. V. Semenyak Russian Federal Research Institute of Fisheries and Oceanography
  • O. V. Chicherina Shirshov Institute of Oceanology, Russian Academy of Sciences
DOI 10.29006/1564-2291.JOR-2018.46(3).10
Keywords the White Sea ecosystem, biogenic substances, the heterotrophic bacterioplankton, the diatom phytoplankton, the herbivorous and predatory zooplankton, macrophytes, the detritus, trophic chaines, the CNPSi biotransformation model of biogenic substances (BS), the biogeochemical portrait of the White Sea, balance of internal and external N and P fluxes for the White Sea and its nine regions

Abstract

On the basis of the average long-term parameters of the marine environment (temperature, light intensity, transparency of water, photoperiod, natural biogenic load and anthropogenic load), the quantitative data were obtained for the characteristics of the biohydrochemical portrait of the White Sea areas using the hydro-ecological CNPSi-model. Main indicators of this portrait are the calculated concentrations of organic and mineral forms of N and P, the biomass of the organisms of the lower trophic links (heterotrophic bacteria, three groups of phytoplankton, herbivorous and predatory zooplankton) and macrophytes, that change during a year and which participate in the transformation of nutrients. The values of positive and negative internal and external nutrient fluxes that characterize the conditions for the nutrient transformation during a year are also calculated. The task of this study was to obtain information on the annual balances of N and P forms on the basis of the calculated values of internal and external nutrient fluxes for different areas and the White Sea as a whole.

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Published
2018-12-26
Issue
Vol 46 No 3 (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