Capacity for Denitrification and Reduction of Nitrate to Ammonia in a Coastal Marine Sediment
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چکیده
منابع مشابه
Capacity for denitrification and reduction of nitrate to ammonia in a coastal marine sediment.
The capacity for dissimilatory reduction of NO(3) to N(2) (N(2)O) and NH(4) was measured in NO(3)-amended marine sediment. Incubation with acetylene (7 x 10 atmospheres [normal]) caused accumulation of N(2)O in the sediment. The rate of N(2)O production equaled the rate of N(2) production in samples without acetylene. Complete inhibition of the reduction of N(2)O to N(2) suggests that the "acet...
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The seasonal variation and depth distribution of the capacity for denitrification and dissimilatory NO(3) reduction to NH(4) (NO(3) ammonification) were studied in the upper 4 cm of the sediment of Norsminde Fjord estuary, Denmark. A combination of C(2)H(2) inhibition and N isotope techniques was used in intact sediment cores in short-term incubations (maximum, 4 h). The denitrification capacit...
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Nitrification, denitrification and nitrate reduction rates in the sediments at two stations in Hiroshima Bay were studied seasonally from August 1994 to May 1995. The acetylene (C2H2) inhibition technique was used to evaluate the rate of these processes. The seasonal average of nitrification and denitrification rates ranged from 0.00 to 299 μg atN m–2h–1 and 0.00 to 69.0 μg atN m–2h–1, respecti...
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Studies were carried out to elucidate the nature and importance of Fe reduction in anaerobic slurries of marine surface sediment. A constant accumulation of Fe took place immediately after the endogenous NO(3) was depleted. Pasteurized controls showed no activity of Fe reduction. Additions of 0.2 mM NO(3) and NO(2) to the active slurries arrested the Fe reduction, and the process was resumed on...
متن کاملEvidence for the Existence of Autotrophic Nitrate-Reducing Fe(II)-Oxidizing Bacteria in Marine Coastal Sediment
Nitrate-reducing Fe(II)-oxidizing microorganisms were described for the first time ca. 20 years ago. Most pure cultures of nitrate-reducing Fe(II) oxidizers can oxidize Fe(II) only under mixotrophic conditions, i.e., when an organic cosubstrate is provided. A small number of nitrate-reducing Fe(II)-oxidizing cultures have been proposed to grow autotrophically, but unambiguous evidence for autot...
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ژورنال
عنوان ژورنال: Applied and Environmental Microbiology
سال: 1978
ISSN: 0099-2240,1098-5336
DOI: 10.1128/aem.35.2.301-305.1978