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. 2017 Sep 2;5:112. doi: 10.1186/s40168-017-0331-1

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© The Author(s). 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Map of Ohio and CPR relative abundance through time. a A map of Ohio with studied colors indicated by various colors; colored circles represent the approximate location of the Ohio Department of Natural Resources (ODNR) sampling wells and one private well. Columbus, OH, is indicated as the yellow dot for reference. b Stacked bar chart of CPR phyla relative abundances from the three ODNR sampling locations (Athens, Greene, and Licking). Oxidation-reduction potential (ORP) is plotted atop the abundance graphs as line graphs