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. 2014 Mar 25;16(10):3128–3142. doi: 10.1111/1462-2920.12403

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© 2014 The Authors. Environmental Microbiology published by Society for Applied Microbiology and John Wiley & Sons Ltd.

This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Downcore abundance and nifH expression of group NB7 (related to D. salexigens and D. vulgaris) enumerated by quantitative PCR in 1 cm intervals from sediment samples collected at four sites, PRE (red), MNB (green), RIS2 (blue) and MP1 (purple). NB7 (A) abundance and (B) nifH expression during each sampling month as indicated by different line styles. NB7 (C) average abundance and (D) average nifH expression over the sampling time points. Graphs are plotted on a log scale and the standard error of the mean indicated by the error bars.