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Please use this identifier to cite or link to this item: http://hdl.handle.net/2264/1076

Title: Nitrification in Kochi backwaters
Authors: Miranda, J.
Balachandran, K.K.
Ramesh, R.
Wafar, M.
Citation: Estuarine, Coastal and Shelf Science, vol.78(2); 291-300p.
Issue Date: 2008
Publisher: Elsevier
Abstract: Nitrification rates, as oxidation of sup(15) N-labelled ammonium and loss of nitrite from N-Serve treated samples, were measured in Kochi backwaters during three seasons. Nitrification rates ranged from undetectable to 166 nmol NL sup(-1) h sup(-1) in the water column and up to 17 nmol N (g wet wt) sup(-1) h sup(-1) in sediments. Nitrification rates were higher in intermediate salinities than in either freshwater or seawater end. Within this salinity range, nitrification rates could be related to ammonium concentrations. As shown by the relation between ammonification and nitrification rates, it is also likely that nitrification is more regulated by renewal rates, rather than by in situ concentrations, of substrate. Among other environmental parameters, temperature and pH may have an influence on nitrification. Potential nitrification rates calculated from loss of nitrite from N-Serve treated, nitrite-enriched samples were about 800 nmol N L sup(-1) h sup(-1) in the water column and 40 nmol N (g wet wt) sup(-1) h sup(-1) in sediments. While these rates are in balance with those of biological ammonium production they may be inadequate to mitigate ammonium pollution in this estuary
Document type: Journal Article
Copyright: Copyright Elsevier [2008]. It is tried to respect the copyright. If it is brought to our notice that the rights are violated then the item would be withdrawn.
URI: http://hdl.handle.net/2264/1076
Appears in Collections:Chemical Sciences

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