Understanding bacterioplankton community dynamics in coastal hypoxic environments is relevant to global biogeochemistry because coastal hypoxia is increasing worldwide The temporal dynamics of bacterioplankton communities were analysed throughout the illuminated water column of Devil's Hole  Bermuda during the 6-week annual transition from a strongly stratified water column with suboxic and high-pCO(2) bottom waters to a fully mixed and ventilated state during 2008