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Nitrification in Kochi backwaters

DRS at CSIR-National Institute of Oceanography

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Title Nitrification in Kochi backwaters
 
Creator Miranda, J.
Balachandran, K.K.
Ramesh, R.
Wafar, M.
 
Subject ammonium oxidation
nitrification
nitrite loss
estuary
 
Description 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
 
Date 2008-05-02T12:09:26Z
2008-05-02T12:09:26Z
2008
 
Type Journal Article
 
Identifier Estuarine, Coastal and Shelf Science, vol.78(2); 291-300p.
http://drs.nio.org/drs/handle/2264/1076
 
Language en
 
Rights 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 If it is brought to our notice that the rights are violated then the item would be withdrawn.
 
Publisher Elsevier