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Preliminary Observations on Cobalt and Vitamin B 12 in Fresh Water 1
Author(s) -
BENOIT RICHARD J.
Publication year - 1957
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 - 10.1002/lno.1957.2.3.0233
Subject(s) - epilimnion , cobalt , hypolimnion , chemistry , vitamin b12 , algae , environmental chemistry , copper , inorganic chemistry , nutrient , botany , biology , biochemistry , eutrophication , organic chemistry
The cobalt, copper, and iron contents of a vertical series of water samples from Linsley Pond are given. Cobalt and iron are higher in the hypolimnion than in the epilimnion, but copper is not, The cobalt and iron content of the seston is estimated to be about equal to the content in normal soils, but the copper content is much higher. Vitamin B 12 only exists in the water at concentrations lower than the optimum for some algae in culture. The proportion of the total cobalt tied up in vitamin B 12 in the epilimnion is about 10% and about 4% or less in the hypolimnion.