Bacterial community succession in response to dissolved organic matter released from live jellyfish  

作　　者：HAO Wenjin WICHELS Antje FUCHS Bernhardt TANG Xuexi GERDTS Gunnar 

机构地区：[1]School of Life Science, Nantong University, Nantong 226019, China [2]Department of Marine Ecology, College of Marine Life Sciences, Ocean University of China, Qingdao 266000, China [3]Alfred Wegener Institute for Polar and Marine Research, Biologische Anstalt Helgoland, Helgoland 27498, Germany [4]Max-Planck-Institute for Marine Microbiology, Department Molecular Ecology, Celsiusstr. 1, Bremen 28359, Germany

出　　处：《Journal of Oceanology and Limnology》2019年第4期1229-1244,共16页海洋湖沼学报（英文）

基　　金：Project at the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (Germany);the funding from the China Scholarship Council;Jutta Niggemann and Thorsten Dittmar (ICBM COU Oldenburg) who supported the preparation of the DOM free seawater strongly with material and technical support;the crew of the AADE research vessel for providing samples as well as the entire team of the AWI Food Web Project

摘　　要：Jellyfish blooms have increased worldwide, and the outbreaks of jellyfish population not only affect the food web structures via voracious predation but also play an important role in the dynamics of nutrients and oxygen in planktonic food webs. However, it remains unclear whether specific carbon compounds released through jellyfish metabolic processes have the potential to shape bacterial community composition. Therefore, in this study, we aimed to investigate the compositional succession of the bacterioplankton community in response to the dissolved organic matter (DOM) released by the live Scyphomedusae Cyanea lamarckii and Chrysaora hysoscella collected from Helgoland Roads of the North Sea. The bacterial community was significantly stimulated by the DOM released form live jellyfish and different dominant phylotypes were observed for these two Scyphomedusae species. Furthermore, the bacterial community structures in the different DOM sources, jellyfish-incubated media, Kabeltonne seawater, and artificial seawater (DOM-free) were significantly different, as revealed by automated ribosomal intergenic spacer analysis fingerprints. Catalyzed reporter deposition fluorescence in situ hybridization (CARD-FISH) revealed a rapid species-specific shift in bacterial community composition. Gammaproteobacteria dominated the community instead of the Bacteroidetes community for C. lamarckii, whereas Gammaproteobacteria and Bacteroidetes dominated the community for C. hysoscella. The significant differences in the bacterial community composition and succession indicate that the components of the DOM released by jellyfish might differ with jellyfish species.Jellyfish blooms have increased worldwide,and the outbreaks of jellyfish population not only affect the food web structures via voracious predation but also play an important role in the dynamics of nutrients and oxygen in planktonic food webs.However,it remains unclear whether specific carbon compounds released through j ellyfish metabolic processes have the potential to shape bacterial community composition.Therefore,in this study,we aimed to investigate the compositional succession of the bacterioplankton community in response to the dissolved organic matter(DOM)released by the live Scyphomedusae Cyanea lamarcki’i and Chrysaora hysoscella collected from Helgoland Roads of the North Sea.The bacterial community was significantly stimulated by the DOM released form live jellyfish and different dominant phylotypes were observed for these two Scyphomedusae species.Furthermore,the bacterial community structures in the different DOM sources,jellyfish-incubated media,Kabeltonne seawater,and artificial seawater(DOM-free)were significantly different,as revealed by automated ribosomal intergenic spacer analy sis fingerprints.Catalyzed reporter depo sition fluorescence in situ hybridization(CARD-FISH)revealed a rapid species-specific shift in bacterial community composition.Gammaproteobacteria dominated the community instead of the Bacteroidetes community for C.lamarckii,whereas Gammaproteobacteria and Bacteroidetes dominated the community for C.hysoscella.The significant differences in the bacterial community composition and succession indicate that the components of the DOM released by jellyfish might differ with jellyfish species.

关 键 词：BACTERIAL COMMUNITY structure BACTERIAL COMMUNITY composition dissolved organic matter JELLYFISH automated rRNA INTERGENIC spacer analysis (ARISA) catalyzed REPORTER deposition fluorescence in situ hybridization (CARD-FISH) 

分 类 号：P[天文地球]