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. 2019 May 22;7:78. doi: 10.1186/s40168-019-0692-8

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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. 2. — Representation of A and KS domain diversity between samples using OTU networks. Main nodes (black dots) represent soil samples, nodes at the end of edges (grey dots) represent single OTUs. The distance between main nodes is equal to the similarity between samples. Edges connect OTU nodes to sample nodes. A OTU network was constructed for each dataset (A and KS domain separately), and both networks were investigated and represented using a different node degree to represent a all OTUs, b only location endemic OTUs belonging to each soil sample and c only OTUs shared between different locations (not between the same location) (node degree ≥ 4)