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. 2014 Apr 3;5:131. doi: 10.3389/fmicb.2014.00131

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Copyright © 2014 Sherry, Grant, Aitken, Jones, Head and Gray.

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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Log abundance of 16S rRNA genes from Smithella spp. and methanogens from the order Methanomicrobiales in microcosms amended with weathered oil (gray bars), non-weathered oil (white bars) or prepared without oil (black bars). All data are from microcosms incubated for 1058 days. The abundance of 16S rRNA genes from Smithella spp. and methanogens from the order Methanomicrobiales at the start of the incubation was 7.00 ± 0.1 and 6.91 ± 0.24 log 16S rRNA genes/microcosm respectively. Error bars indicate ±1 × standard error (n = 3).