Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4477247 | Marine Pollution Bulletin | 2008 | 9 Pages |
Abstract
Denitrification (as N2 flux) and organic matter mineralization (as O2 uptake) were simultaneously measured in the same set of core sediments from a natural sandy and a constructed muddy tidal flat of Ago Bay, Japan. Denitrification rates at both tidal flats fluctuated between ca. 2-20 μmol N2 mâ2 hâ1 without showing a clear seasonal pattern, and appeared to be substrate limited as NO3- enrichment (final concentration ca. 225 μM) caused prompt and similar enhancements of ca. 10-folds. Organic matter mineralization rates were markedly higher at constructed muddy flat compared to those of natural sandy flat, especially in summer, and exhibited pronounced temperature dependent (p < 0.01) seasonality for both tidal flats. O2 uptake rates were generally ca. 2-3 order greater than respective denitrification rates indicating dominance of mineralization processes over N2 losses.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Oceanography
Authors
Arun Bhai Patel,