Actions for Impacts of chemical gradients on microbial community structure [electronic resource].

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Impacts of chemical gradients on microbial community structure [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2017.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
pages 920-931 : digital, PDF file
Additional Creators
Oak Ridge National Laboratory, United States. Department of Energy, Natural Sciences and Engineering Research Council Canada, Belgium. Office of the European Research Council Executive Agency (ERCEA), and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Succession of redox processes is sometimes assumed to define a basic microbial community structure for ecosystems with oxygen gradients. In this paradigm, aerobic respiration, denitrification, fermentation and sulfate reduction proceed in a thermodynamically determined order, known as the ‘redox tower’. Here, we investigated whether redox sorting of microbial processes explains microbial community structure at low-oxygen concentrations. We subjected a diverse microbial community sampled from a coastal marine sediment to 100 days of tidal cycling in a laboratory chemostat. Oxygen gradients (both in space and time) led to the assembly of a microbial community dominated by populations that each performed aerobic and anaerobic metabolism in parallel. This was shown by metagenomics, transcriptomics, proteomics and stable isotope incubations. Effective oxygen consumption combined with the formation of microaggregates sustained the activity of oxygen-sensitive anaerobic enzymes, leading to braiding of unsorted redox processes, within and between populations. Analyses of available metagenomic data sets indicated that the same ecological strategies might also be successful in some natural ecosystems.
Report Numbers
E 1.99:1394612
Subject(s)
Note
Published through SciTech Connect.
01/17/2017.
"103843"
The ISME Journal 11 4 ISSN 1751-7362 AM
Jianwei Chen; Anna Hanke; Halina E. Tegetmeyer; Ines Kattelmann; Ritin Sharma; Emmo Hamann; Theresa Hargesheimer; Beate Kraft; Sabine Lenk; Jeanine S. Geelhoed; Robert L. Hettich; Marc Strous.
Univ. of Calgary, AB (Canada)
Max Planck Inst. for Marine Microbiology, Bremen (Germany)
German Federal State North Rhine-Westphalia
Max Planck Society (Germany)
Funding Information
AC05-00OR22725
MASEM 242635
StG 306933
View MARC record | catkey: 23498430