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. 2016 Jan 19;10(7):1613–1624. doi: 10.1038/ismej.2015.239

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Copyright © 2016 International Society for Microbial Ecology

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/4.0/

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Microbial activity assay in dry and ice-cemented permafrost samples. The ¹⁴C-labelled acetate radiorespiration assays. Open symbols represent abiotic CO₂ production in killed controls. Standard error is reported here. Not shown are assays carried out at −10 °C and −15 °C that exhibited no detectable mineralization.