sentences:  Common anaerobic soil bacteria debrominated decaBDE and octaBDE in a 2006 study.In 2006-2007 studies, metabolic debromination of decaBDE was demonstrated in fish, birds, cows, and rats.A 2007 study by La Guardia and colleagues measured PBDE congeners "from a wastewater treatment plant (sludge) to receiving stream sediments and associated aquatic biota"; it "support[ed] the hypothesis that metabolic debromination of -209 [i.e., decaBDE] does occur in the aquatic environment under realistic conditions."