Abstract
The decomposition of dead freshwater plankton in anaerobic conditions was studied. There was no evidence of any lag phase in the ammonification of nitrogenous fractions. Nitrifying activity was not observed. Only nitrite was formed and its conc increased gradually. Carbonaceous constituents in dead plankton were quickly decomposed. Orthophosphate and silicate were remineralized slowly. No relationship between the regenerating nutrients was discernible.