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. 2017 Jul 21;8:1378. doi: 10.3389/fmicb.2017.01378

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Copyright © 2017 Li, Cui, Yang, Cui, Wei, Wu, Wang and Zhou.

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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Principal component analysis (PCoA) of bacterial 16S rRNA gene sequences obtained from different spatial positions of inactive sulfide chimneys and active young sulfate chimney. Triangle: subsamples from Milli-Q S10; Pentagen: subsamples from Milli-Q S10-4; Square: subsamples from CAP. Red: subsamples from inner parts; Purple: subsamples from middle layers; Blue: subsamples from exterior walls.