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A Study of the Excretion and Extracellular Products of Natural Phytoplankton in Lake Nakanuma, Japan
Author(s) -
Watanabe Yasunori
Publication year - 1980
Publication title -
internationale revue der gesamten hydrobiologie und hydrographie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 0020-9309
DOI - 10.1002/iroh.19800650606
Subject(s) - excretion , phytoplankton , nutrient , photosynthesis , extracellular polysaccharide , zoology , environmental chemistry , chemistry , extracellular , polysaccharide , biology , ecology , biochemistry
Excretion of photosynthetic products by phytoplankton in Lake Nakanuma ranged from 8 to 54% of the total carbon assimilated. Percentage of excretion increased under the conditions of high and very low light intensity, low temperature and nutrient deficiency. Estimated daily production of extracellular products in the lake was about 150 mg C/m 2 in the summer season and the major components of it were glycolic acid, polysaccharides and polypeptides.