Projects per year
Nitrifier activity and growth were measured in the Scheldt estuary over a salinity gradient. Measurements were made during all 4 seasons using N-15 enriched ammonium and C-14 labeled carbon incorporation. Established conversion ratios are often used to convert the growth of nitrifiers (measured as the incorporation of carbon) to nitrifying activity (i.e. oxidation of ammonium to nitrate). Our study demonstrated that the conversion of growth rates to nitrifying activity induces uncertainty because activity and growth of nitrifiers may be uncoupled. The C:N conversion ratio appears to be oxygen and temperature dependent. We advocate the use of N-15 stable isotope techniques to study nitrification: this technique measures the actual activity of nitrifiers without the disadvantages involved in using inhibitors, and thus allows light inhibition to be measured.
|Number of pages||10|
|Journal||Aquatic Microbial Ecology|
|Publication status||Published - 2006|
Bibliographical noteAquatic Microbial Ecology 42: 149-158
FWOAL208: Balance of heterotrophic and autrophic processes in the Scheldt estuary and impact on the carbon-and nitrogenflows.
1/01/02 → 31/12/04