Tianjin Key Laboratory of Marine Resources and Chemistry,Tianjin University of Science and Technology,Tianjin 300457,China;
Research Centre for Indian Ocean Ecosystem,Tianjin University of Science and Technology,Tianjin 300457,China;
Department of Microbiology,Stroud Water Research Center,Avondale,PA 19311,USA;
Laboratory of Marine Biology and Ecology,Third Institute of Oceanography,Ministry of Natural Resources,Xiamen 361005,China;
College of Marine Science and Technology,China University of Geosciences(Wuhan),Wuhan 430074,China;
Bacterial community; Hypoxia; Stratification; The Bohai Sea; Nitrogen cycles; High-throughput sequencing;