show Abstracthide AbstractMetagenomic analysis of two enhanced biological phosphorus removal bioreactors dominated by Candidatus Accumulibacter phosphatis. Reactors were run in 2011 where the sole change in operational conditions between the two was the concentration of carbon and phosphorus fed to the reactor. Enhanced biological phosphorus removal (EBPR) is a system to treat wastewater using mixed culture communities dominated by bacteria that can accumulate large quantities of intracellular polyphosphate. In laboratory-scale systems these communities are dominated by Candidatus Accumulibacter phosphatis. This work is part of a larger project surrounding temporal interactions between bacteriophage and their hosts in Enhanced Biological Phosphorus Removal (EBPR) systems.