Abstract: Eight PAHs-degrading bacterial strains were screened out from the enriched culture with PAHs-contaminated soils in Benxi City of Liaoning Province, Northeast China, and the capability of the strains in degrading phenanthrene, phyrene, and benzo［a］pyrene with an initial concentration of 50, 50, and 5 mg·L^-1 in medium was determined after 28-day incubation at 28 ℃. Among the strains screened out, B3 showed the best degrading effect, with the degradation rate of phenanthrene, phyrene, and benzo［a］pyrene being 88.4%, 54.0%, and 68.4%, while the degradation rate of these compounds by the mixed 8 strains was 87.7%, 35.3%, and 42.0%, respectively. The strain B3 was identified as Pseudomonas sp., based on its physiological and biochemical characteristics and the sequence analysis of 16S rRNA.

Key words: Intertidal zone, Community diversity, Community, Changshan archipelago