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. 2017 Dec 5;8:2384. doi: 10.3389/fmicb.2017.02384

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Copyright © 2017 Fuchsman, Devol, Saunders, McKay and Rocap.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) Phylogenetic tree of the nirK/aniA gene encoding a NO producing nitrite reductase containing copper. Names with ETNP indicate sequences assembled from our metagenomes. Labels colors on the tree match individual OTU depth profiles below (C–G). Depth profiles of (B) total nirK and nirK phylotypes: (C) OTU I, (D) OTU II, (E) Chloroflexi (F) ammonia-oxidizing archaea, (G) nitrite oxidizer Nitrospina. In all depth profiles, Xs indicate particulate (>30 μm) samples. Dashed line represents the top of the ODZ. % Community is calculated in comparison to the single copy core gene RNA polymerase (rpoB). Red asterisks indicate placement of ETNP transcripts from Ganesh et al. (2015).