Inorganic nitrogen uptake by marine phytoplankton under in situ and simulated in situ incubation conditions: Results from the northwest African upwelling region1

Abstract

Ammonium and nitrate uptake by euphotic zone populations of marine phytoplankton were compared under in situ and simulated in situ incubation conditions. The in situ values from all depths were generally higher than those from deck incubators, but the source of the difference was not identified.