V. I. Matveev, E. A. Tikhomirova, V. A. Luchin - Primary production of the Sea of Okhotsk in the years of different temperature conditions

BIOLOGIYA MORYA, 2015, Vol. 41, No. 3, pp. 179-187

Primary production of the Sea of Okhotsk in the years of different temperature conditions

¹Pacific Fisheries Research Center, Vladivostok 690950;
²V.I. Ilichev Pacific Oceanological Institute, Far East Branch, Russian Academy of Sciences, Vladivostok 690041;
³Far Eastern Federal University, Vladivostok 690950

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Using materials of oceanographic observations for 1932-2014, the value of a "new" primary production of the Sea of Okhotsk Sea was assessed basing on loss of silicon content in the euphotic layer. The average long-term estimations are carried out for the spring-summer period (May-July) after "cold" and "warm" hydrological winters. It is shown that in the main part of the surveyed area, the spring-summer phytoplankton production was 1.5-2.0 times higher after "warm" winters than after "cold" ones.

Key words: primary production, Sea of Okhotsk, "starting" concentration, nutrients, compensatory surface.