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. 2018 Oct 27;6:194. doi: 10.1186/s40168-018-0583-4

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© The Author(s). 2018

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. 3 — Heat map of relative abundance of the 50 MAGs (R1 and R1H: single stage pre- and post-H₂, respectively; R2 and R2H: acidogenic reactor of the two-stage pre- and post-H₂, respectively; R3 and R3H: methanogenic reactor of the two-stage pre- and post-H₂, respectively; a–c: replicates). Up and down arrows indicate the statistically significant shifts in abundance of the MAGs (increase and decrease, respectively) between the two conditions (pre-/post-H₂)