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Patterns and ecological drivers of ocean viral communities

Jennifer Brum 1 J Cesar Ignacio-Espinoza 1 Simon Roux 1 Guilhem Doulcier 2, 1 Silvia G. Acinas 3 Adriana A. Alberti 4, 5 Samuel Chaffron 6 Corinne Cruaud 5 Colomban de Vargas 7 Josep Gasol Gabriel Gorsky 8 Ann Gregory Lionel Guidi 9 Pascal Hingamp 10 Daniele Iudicone 11 Fabrice Not 12 Hiroyuki Ogata 10 Stéphane Pesant 13 Bonnie Poulos Sarah Schwenck Sabrina Speich 14 Céline Dimier 15 Stefanie Kandels-Lewis 16 Marc Picheral 8 Sarah Searson 8 Peer Bork 17 Chris Bowler 2 Shinichi Sunagawa 17 Patrick Wincker 18, 5 Eric Karsenti 16 Matthew Sullivan 19 C. Ignacio-Espinoza M. Gasol C. Gregory M. Schwenck 
Abstract : Viruses influence ecosystems by modulating microbial population size, diversity, metabolic outputs, and gene flow. Here, we use quantitative double-stranded DNA (dsDNA) viral-fraction metagenomes (viromes) and whole viral community morphological data sets from 43 Tara Oceans expedition samples to assess viral community patterns and structure in the upper ocean. Protein cluster cataloging defined pelagic upper-ocean viral community pan and core gene sets and suggested that this sequence space is well-sampled. Analyses of viral protein clusters, populations, and morphology revealed biogeographic patterns whereby viral communities were passively transported on oceanic currents and locally structured by environmental conditions that affect host community structure. Together, these investigations establish a global ocean dsDNA viromic data set with analyses supporting the seed-bank hypothesis to explain how oceanic viral communities maintain high local diversity.
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Submitted on : Tuesday, April 17, 2018 - 10:37:18 AM
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Jennifer Brum, J Cesar Ignacio-Espinoza, Simon Roux, Guilhem Doulcier, Silvia G. Acinas, et al.. Patterns and ecological drivers of ocean viral communities. Science, 2015, 348 ( 6237), pp.1261498. ⟨10.1126/science.1261498⟩. ⟨hal-01768331⟩



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