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. 2016 Aug 5;7:1213. doi: 10.3389/fmicb.2016.01213

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Copyright © 2016 Obi, Adebusoye, Ugoji, Ilori, Amund and Hickey.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Expanded view of proteobacterial OTU showing significant correlations in abundance to PAH/metals of subcluster III (see Figures 7 and 8A,B). Bars show the relative abundance of each OTU in the indicated sediment, expressed as percentage of the total abundance of the OTU across all samples. Proteobacterial subclasses illustrated are α, alpha; β, beta; γ, gamma, and ε, epsilon. Abundance of each OTU in each sediment is in each of the sediments indicated by bar color (Apapa, red; Ofin, blue; Eledu, green) and expressed as a percentage of the total number of quality-filtered amplicons assigned to that OTU across all sediments.