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. 2016 Jun 14;7:903. doi: 10.3389/fmicb.2016.00903

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Copyright © 2016 Frossard, Hammes and Gessner.

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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Bacterial abundances assessed by three different methods (FCM, flow cytometry; EM, epifluorescence microscopy; ATP, ATP quantification) in (A) stream sediments, (B) lake sediments, (C) natural soils, (D) agricultural soils, (E) filter sludge of a drinking water treatment plant, and (F) all environments together. Horizontal thick lines show median values, boxes denote values comprised within the lower and upper quartile of the data, thin vertical lines represent ranges, and • indicate outliers.