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dc.contributor.authorDahle, Håkon
dc.contributor.authorØkland, Ingeborg Elisabet
dc.contributor.authorThorseth, Ingunn Hindenes
dc.contributor.authorPedersen, Rolf B.
dc.contributor.authorSteen, Ida Helene
dc.PublishedThe ISME Journal 2015, 9(7):1593-1606eng
dc.description.abstractMethods developed in geochemical modelling combined with recent advances in molecular microbial ecology provide new opportunities to explore how microbial communities are shaped by their chemical surroundings. Here, we present a framework for analyses of how chemical energy availability shape chemotrophic microbial communities in hydrothermal systems through an investigation of two geochemically different basalt-hosted hydrothermal systems on the Arctic Mid-Ocean Ridge: the Soria Moria Vent field (SMVF) and the Loki’s Castle Vent Field (LCVF). Chemical energy landscapes were evaluated through modelling of the Gibbs energy from selected redox reactions under different mixing ratios between seawater and hydrothermal fluids. Our models indicate that the sediment-influenced LCVF has a much higher potential for both anaerobic and aerobic methane oxidation, as well as aerobic ammonium and hydrogen oxidation, than the SMVF. The modelled energy landscapes were used to develop microbial community composition models, which were compared with community compositions in environmental samples inside or on the exterior of hydrothermal chimneys, as assessed by pyrosequencing of partial 16S rRNA genes. We show that modelled microbial communities based solely on thermodynamic considerations can have a high predictive power and provide a framework for analyses of the link between energy availability and microbial community composition.en_US
dc.publisherNature Publishing Group (NPG)en_US
dc.rightsAttribution CC BY-NC-ND 3.0eng
dc.subjectArctic mid-ocean ridgeeng
dc.subjecthydrothermal systemseng
dc.titleEnergy landscapes shape microbial communities in hydrothermal systems on the Arctic Mid-Ocean Ridgeen_US
dc.typePeer reviewed
dc.typeJournal article
dc.rights.holderCopyright 2015, Rights Managed by Nature Publishing Groupen_US
dc.relation.projectNorges forskningsråd: 179560
dc.subject.nsiVDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488
dc.subject.nsiVDP::Mathematics and natural scienses: 400::Zoology and botany: 480::Ecology: 488
dc.subject.nsiVDP::Matematikk og Naturvitenskap: 400en_US

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Attribution CC BY-NC-ND 3.0
Except where otherwise noted, this item's license is described as Attribution CC BY-NC-ND 3.0