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. 2019 Aug 19;16:105. doi: 10.1186/s12985-019-1211-z

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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. 6 — The abundance of the virome was correlated with the bacterial composition. (a, b) RDA of DNA viruses and bacteriophages, using abundances of the bacterial microbiome at the phylum level as environmental factors. Red arrows represent the digital environmental factors. If the sample point is in the direction of the arrow, there is a positive interaction between the environmental factor and the sample distribution, and if the sample point is in the opposite direction as the arrow, there is a negative interaction between the environmental factor and the sample distribution. The length of each arrows represents the degree of impact. (c, d) Linear regression analysis between bacteriophage abundance and both ACE and Shannon diversity index. We found positive correlations in both cases (p < 0.05)