The Interaction Between Ammonium and Nitrate Uptake in Phytoplankton

A basic tenet of nitrogen utilization in phytoplankton is that ammonium inhibits nitrateuptake Consequently, it is generally believed that little or no nitrate uptake occurs at ammoniumconcentrations above ca 1 11M. A thorough review of field studies shows that the reduction of nitrateuptake rate in the presence of ammonium is rarely so severe, and that it is a highly variablephenomenon. To simplify quantification of the interaction between nitrate and ammonium uptake, it isproposed that it be divided into an indirect interaction, preference, and a direct effect, inhibition. ...

Publisher - Inter-Research

Subjects - Chemical, Ammonium ion; Chemical, Nitrate

Collection: Section 2: Water Quality (2014)

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Citation: Dortch Q. 1990. The Interaction Between Ammonium and Nitrate Uptake in Phytoplankton Mar. Ecol. Prog. Ser.; 61(1):183-201 http://www.int-res.com/articles/meps/61/m061p183.pdf