Direct Determination of Nitrification in Marine Waters by Using the Short-Lived Radioisotope of Nitrogen, 13N

AUTOR(ES)

Capone, Douglas G.

RESUMO

Biological oxidation of radiolabeled 13NH4+ (half-life = 10 min) was observed within minutes in assays of an estuarine ammonium oxidizer and in natural populations of nitrifiers in coastal waters. Our estimates of turnover of the ammonium pool and rates of nitrification based on experiments using 13N are consistent with previous values in the literature based on longer-term 15N tracer experiments or on indirect methods and thus provide corroboration for the estimates by other researchers.

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