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. 2019 Apr 1;7:53. doi: 10.1186/s40168-019-0672-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. 2 — Airborne DNA and RNA viral community richness and evenness by season. Boxplots of alpha diversity by season (spring, n = 3; summer, n = 3; fall, n = 3; winter, n = 4; closed n = 1); whiskers extend 1.5× past the interquartile range. a–c Estimates of alpha diversity for DNA viruses based on a observed species, b Pielou’s evenness, and c Shannon diversity index. d–f Estimates of alpha diversity for RNA viruses based on d observed species, e Pielou’s evenness, and f Shannon diversity index