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Simultaneous photoreduction and microbial oxidation of iron in a stream in the New Jersey Pinelands 1
Author(s) -
Madsen Eugene L.,
Morgan Mark D.,
Good Ralph E.
Publication year - 1986
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.1986.31.4.0832
Subject(s) - ferrous , oxidizing agent , iron bacteria , environmental chemistry , microorganism , chemistry , ferric , ferric iron , organic matter , sterilization (economics) , bacteria , inorganic chemistry , biology , organic chemistry , foreign exchange , monetary economics , economics , foreign exchange market , genetics
Photoreduction of ferric to ferrous iron was determined in water held in bottles placed in a New Jersey Pinelands stream, although concentrations of ferrous iron in the stream itself remained below detection (15 ng ml −1 ). The low ambient levels of ferrous iron apparently resulted from the action of iron‐oxidizing microorganisms in water and soil, as shown by a temperature optimum for, and by the inhibitory effect of sterilization upon, the disappearance of ferrous iron. Measurements of 14 CO 2 incorporation into soil organic matter indicated that the iron‐oxidizing microorganisms were not chemolithoautotrophs, but might have been iron‐depositing bacteria or chemolithoheterotrophs.