Open AccessModel of nitrification and denitrification in marine sediments
Author(s) -
Blackburn T. Henry,
Blackburn Nicholas D.
Publication year - 1992
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.1992.tb14086.x
Subject(s) - nitrification , environmental chemistry , degradation (telecommunications) , sediment , denitrification , flux (metallurgy) , nitrogen , chemistry , diffusion , organic matter , simultaneous nitrification denitrification , geology , organic chemistry , telecommunications , physics , computer science , thermodynamics , paleontology
Processes involved in the C, N, S, and O cycles in a marine sediment were stimulated for a situation where most organic degradation occured in the top 2 mm and NO 3 − was not present in the overlying water. The effect of increasing organic loading was examined (degradation of C ? 7 to 107 mmol m −2 d −1 ). Increasing organic loading had the following results: (1) ? 50% of the dissolved organic nitrogen was lost by diffusion in all treatments; (2) the proportion of NH 4 ++; flux increased, the proportion of nitrification increased slightly and then decreased; and (3) the proportion of NO 3 − of NO 3 − efflux.