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. 2019 Feb 18;19:42. doi: 10.1186/s12866-019-1399-5

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© The Author(s). 2019

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. 4 — Differential abundance of each operational taxonomic unit (OTU) analysed by negative binomial distribution, represented in a heatmap for significant differential abundant OTUs. The mean abundance was normalised within each OTU to the maximal values. The colour code is from yellow (low abundance, 0) to blue (maximal abundance, 1). Green rectangles represent a significant differential abundance between microbial communities A and B, red squares represent a significant differential abundance between microbial communities A and C, and cyan squares represent a significant differential abundance between microbial communities B and C. The OTUs are named according to their genus classification