Allogenic succession of marine bacterial communities in response to pharmaceutical waste

摘要

Vibriospp. predominated in the culturable bacterial community of surface waters of the Puerto Rico Trench at the site of disposal for nearly ten years of pharmaceutical wastes. In this area and surrounding waters as far as 1000 km north of the dumpsite and south into the Caribbean Sea,Vibriospp. comprised up to 100 of the culturable bacteria, withAcinetobacterspp. being the second most prevalent group.Pseudomonasspp., reported to be common in these waters a decade earlier, were virtually absent from all samples examined during a three year study involving 9 cruises.Staphylococcusspp. were also found in water samples collected within the dumpsite. Using cultures isolated from surface water samples collected at the dumpsite, laboratory experiments confirmed that pharmaceutical waste can enrich forVibriospp., in preference toPseudomonasspp., with growth of the strains proportional to the amount of waste added.