Changes of microbial community in the petroleum-contaminated area may have a critical effect on the process of bioremediation. In the study, high-throughput sequencing was used to study the stucture of microbial community in the petroleum-contaminated area of Xiuying port, Haikou. In results, there showed differences in microbial communities between seawater and sediment at the same site. Base on the metagemone analysis, both bacteria and archaea were frequentuly found in seawater, whereas bacteria was the dominant microorganism in sediment. Based on category analysis, the seawater samples mainly include Chloroflexi(18%), Proteobacteria(18%), Planctomycetes(12%), The sediment samples were mainly include Bacteroidetes (29%), Proteobacteria (29%), Firmicutes (19%) and Actinobacteria (14%). In conlusion, the study is of great significance to the study of microbial remediation of petroleum contaminated marine waters.
