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. 2017 May 25;7:2400. doi: 10.1038/s41598-017-02295-x

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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 images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fine-scale microbial abundance and geochemical profiles of surface sediments at M1 (M1-RL, top row of panels) and M5 (M5-RL, bottom row of panels). (a,b), abundances of archaeal and bacterial 16S genes; (c,d), BARs; (e,f) mean ²¹⁰Pb_unsupp and ¹³⁷Cs values ± standard deviation (SD) - the detection limit of ²¹⁰Pb_unsupp and ¹³⁷Cs is indicated by the dashed black line; (g,h), concentrations of sulfate and DIC; (i,j), δ¹³C-DIC and -TOC. The horizontal grey dashed lines indicate 0.14 mbsf, which is the minimum depth of macrofaunal sediment reworking based on ²¹⁰Pb_unsupp. The shaded grey area at M5 marks the interval of the SMTZ.