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. 2016 Mar 30;16:18. doi: 10.1186/s12898-016-0072-1

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© Bartlewicz et al. 2016

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 — A scatter plot of urbanization versus microbial OTU richness found in the nectar of the 20 Linaria vulgaris populations located across an urbanization gradient in the vicinity of Leuven, Belgium. Urbanization was measured as an impervious surface percentage within a 500 m radius from each sampled population. Bacterial OTUs were defined as sequence clusters exhibiting at least 1 % dissimilarity from each other, and presented red squares while yeast OTUs were defined as sequence clusters exhibiting at least 3 % dissimilarity from each other, and presented as blue circles. There was no correlation between bacterial nor yeast OTU richness and urbanization