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PRODUCTION AND DECOMPOSITION OF ORGANIC MATTER IN A BAY OF THE JAPAN SEA DURING THE WINTER DIATOM BLOOM
Author(s) -
Sorokin Yu. I.,
Konovalova I. W.
Publication year - 1973
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1973.18.6.0962
Subject(s) - bloom , bay , diatom , chaetoceros , oceanography , zooplankton , phytoplankton , environmental science , biomass (ecology) , nutrient , spring bloom , organic matter , decomposition , photosynthesis , algae , biology , ecology , botany , geology
The winter bloom of diatoms studied under the ice of a bay in the Japan Sea consisted mainly of species of Thalassiosira and Chaetoceros, having a low temperature optimum (9°C) for photosynthesis and a low optimum of illumination (2 klux). Photosynthesis proceeded to 8–15 m in water under the ice at −1.8°C. The cause of the bloom is related to optimal illumination and nutrient supply during this period. Microbial biomass was sufficiently high to sustain the normal feeding on zooplankton. Thus, an active process of biological production takes place there even in winter at subzero temperature.