Distinct taxonomic and ecological functions of microbiome in sediments of different depth in Bohai Sea and Yellow Sea  

作　　者：Siqi LI Ye CHEN Lun SONG Tiezhu MI Yu ZHEN Zhigang YU 

机构地区：[1]College of Marine Life Science,Ocean University of China,Qingdao 266003,China [2]Laboratory for Marine Ecology and Environmental Science,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266237,Chin [3]Key Laboratory of Marine Environment and Ecology,Ministry of Education,Ocean University of China,Qingdao 266100,China [4]Key Laboratory of Gas Hydrate,Ministry of Natural Resources,Qingdao Institute of Marine Geology,Qingdao 266071,China [5]Liaoning Ocean and Fisheries Science Research Institute,Dalian 116023,China [6]College of Environmental Science and Engineering,Ocean University of China,Qingdao 266100,China [7]Key Laboratory of Marine Chemistry Theory and Technology,Ministry of Education/Institute for Advanced Ocean Study,Ocean University of China,Qingdao 266100,China

出　　处：《Journal of Oceanology and Limnology》2023年第5期1765-1780,共16页海洋湖沼学报（英文）

基　　金：Supported by the National Natural Science Foundation of China (Nos.42130410,41620104001,41976133);the Fundamental Research Funds for the Central Universities (No.202061013)。

摘　　要：Microorganisms in sediments are critical to marine ecosystems.The microbial communities in marine sediments of the Bohai Sea(BS)and Yellow Sea(YS),the eastern Chinese marginal seas,were uncovered in employing the metagenomic approach.In addition,the taxonomic and functional compositions of microbes were compared among various sediment core depths.Results showing the compositions,diversities,and functions of the microbial communities showed no significant variations with sea areas,and significant seasonal variations was observed in station 3500-7 only on functions of the microbial communities.Moreover,the compositions,diversities,and functions of the microbial communities changed noticeably in different sediment depths in close correlation with physical and chemical properties of sediments.However,the large fraction of the variation in functional communities remained unexplained.From bioinformatic analysis of the metagenomic data,the carbon-metabolismrelated genes such as glycosyl transferase(GT),glycoside hydrolase(GH),and carbohydrate esterase(CE)genes were rich in the microbial community,especially in the top sediment depth.Additionally,in this N-polluted habitat,nitrification and anaerobic ammonia oxidation(anammox)were dominant in the top sediment depth,whereas dissimilatory nitrate reduction to ammonium(DNRA)and denitrification were dominant in the middle and bottom depth,respectively.Further identification of possible biogeochemical links suggested that Gammaproteobacteria,Alphaproteobacteria,Nitrospirae,Nitrospinae,Chloroflexi,and Methanomicrobia might promote effective circulation of carbon and nitrogen cycling.This study expanded our knowledge about the structure and functional potential of microbial communities associated with different sediment depth,and provided further comprehensive information on element cycles in marine environments.

关 键 词：microbial community function metagenome sequencing marine sediments 

分 类 号：Q939[生物学—微生物学]