Virus-Host Interactions Drive Contrasting Bacterial Diel Dynamics in the Ocean  

作　　者：Xiaowei Chen Chen Hu Wei Wei Yunlan Yang Markus G.Weinbauer Hongbo Li Shiying Ren Ruije Ma YVibin Huang Tingwei Luo Nianzhi Jiao Rui Zhang 

机构地区：[1]State Key Laboratory of Marine Environmental Science,College of Ocean and Earth Sciences,Fujian Key Laboratory of Marine Carbon Sequestration,Xiamen University,Xiamen 361102,PR China [2]College of the Environment and Ecology,Xiamen University,Xiamen 361102,PR China [3]Research Center for Environmental Ecology and Engineering,School of Environmental Ecology and Biological Engineering,Wuhan Institute of Technology,Wuhan 430205,PR China [4]Sorbonne Universités,UPMC,UniversitéParis 06,CNRS,Laboratoire d'Oceanographie de Villefranche(LOV),Villefranche-sur-Mer 06230,France [5]National Marine Environmental Monitoring Center,Ministry of Ecological Environment,Dalian 116023,PR China [6]Department of Ocean Sciences,University of California,Santa Cruz,CA,USA [7]NOAA/OAR Pacific Marine Environmental Laboratory,Seattle,WA,USA [8]Institute for Advanced Study,Shenzhen University,Shenzhen 518055,PR China

出　　处：《Research》2024年第2期389-399,共11页研究（英文）

基　　金：support from the Senior User Project of RV KEXUE(KEXUE2020G10)of Center for Ocean Mega-Science,Chinese Academy of Sciences;supported by the National Natural Science Foundation of China(41861144018,42188102,91951209,41906085,and 2021YFE0193000);X.C.was supported by the PhD Fellowship of the State Key Laboratory of Marine Environmental Science at Xiamen University;M.G.W.was supported by the international collaborative project on"Marine Biogeochemistry and Ecotoxicology"funded by the Program of Introducing Talents of Discipline to Universities(BP0719030);C.H.was supported by the China Postdoctoral Science Foundation(2021M691863);the Natural Science Foundation of Fujian Province of China(2023J05017);Y.Y.was supported by China Postdoctoral Science Foundation(2019M662237).

摘　　要：Marine organisms perform a sea of diel rhythmicity.Planktonic diel dynamics have been shown to be driven by light,energy resources,circadian rhythms,and the coordinated coupling of photoautotrophs and heterotrophic bacterioplankton.Here,we explore the diel fluctuation of viral production and decay and their impact on the total and active bacterial community in the coastal and open seawaters of the South China Sea.The results showed that the night-production diel pattern of lytic viral production was concurrent with the lower viral decay at night,contributing to the accumulation of the viral population size during the night for surface waters.The diel variations in bacterial activity,community composition,and diversity were found highly affected by viral dynamics.This was revealed by the finding that bacterial community diversity was positively correlated to lytic viral production in the euphotic zone of the open ocean but was negatively related to lysogenic viral production in the coastal ocean.Such distinct but contrasting correlations suggest that viral life strategies can not only contribute to diversifying bacterial community but also potentially piggyback their host to dominate bacterial community,suggesting the tightly synchronized depth-dependent and habitat-specific diel patterns of virus-host interactions.It further implies that viruses serve as an ecologically important driver of bacterial diel dynamics across the ocean,highlighting the viral roles in bacterial ecological and biogeochemical processes in the ocean.

关 键 词：COASTAL OCEAN MARINE 

分 类 号：O313[理学—一般力学与力学基础]