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. 2017 May 31;12(5):e0177604. doi: 10.1371/journal.pone.0177604

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© 2017 LeKieffre et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 1 — (A) Average total organic carbon (TOC in μg C×ind^-1) concentration and (B) ¹³C atomic fraction of the TOC (x(¹³C)_TOC in %), both as a function of time. Continuous lines: oxic conditions, dotted lines: anoxic conditions. Error bars are ±1 SD (n = 3).