My research interest focuses on the diversity and functional roles of microorganisms in aquatic environments. Culture-dependent and – independent approaches are used to address “who are they” and “what are they doing”. Whole-genome study is applied to understand the adaptation mechanisms at singe species level. Metagenomics technique together with various bioinformatics tools is applied to investigate the population dynamics of microbial community and their nutrients processing pathways. Other “omics” approaches are also used to reveal the functional and metabolic diversity of microbes at different circumstances.