Abstract
In the ocean’s major oxygen minimum zones (OMZs), oxygen is effectively absent from sea water and life is dominated by microorganisms that use chemicals other than oxygen for respiration. Recent studies that combine advanced genomic and chemical detection methods are delineating the different metabolic niches that microorganisms can occupy in OMZs. Understanding these niches, the microorganisms that inhabit them, and their influence on marine biogeochemical cycles is crucial as OMZs expand with increasing seawater temperatures.
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Reproduced from Frank J. Stewart and Osvaldo Ulloa, from: Metagenomics of the Microbial Nitrogen Cycle: Theory, Methods and Applications (Edited by: Diana Marco). Caister Academic Press, UK (2014)82.


Change history
08 October 2018
In Figure 3, ‘Candidatus Scalindua’ and Thaumarchaeota were erroneously shown to produce nitrous oxide (N2O). As neither group directly produces N2O, the arrows and products have been removed both online and in the pdf. The authors apologize for any confusion caused.
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Acknowledgements
The authors thank the National Science Foundation (grants 1151698, 1558916 and 1564559 to F.J.S.) for generous and valuable support of OMZ research.
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Nature Reviews Microbiology thanks A. Babbin, M. Kuypers and the other anonymous reviewer(s) for their contribution to the peer review of this work.
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Bertagnolli, A.D., Stewart, F.J. Microbial niches in marine oxygen minimum zones. Nat Rev Microbiol 16, 723–729 (2018). https://doi.org/10.1038/s41579-018-0087-z
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DOI: https://doi.org/10.1038/s41579-018-0087-z