STUDIES OF BIOHYDROCHEMICAL STRUCTURE OF THE EUPHOTIC LAYER AND PRIMARY PRODUCTION IN THE BERING SEA

Calculations of new production (NP) have been made on hydrochemical ch aracteristics, recycling production (RP) have been assessed on the rec ycling of phosphorus and nitrogen. Photosynthesis, coupling with the u ptake of nutrients and development of minimum of silica acid and maxim um of oxygen, at the lower chlorophyll max in the pycnocline is discus sed. In situ determination of production by C-14 and oxygen and vertic al scanning of chlorophyll ''a'' have permitted to calculate: assimila tion numbers for all the biohydrochemical areas and to map primary pro duction (PP) distribution in the Bering Sea. The total value of PP in the Bering Sea has been assessed and equals 6.4 x 10(8) t C year.