Articles | Volume 16, issue 19
https://doi.org/10.5194/bg-16-3941-2019
https://doi.org/10.5194/bg-16-3941-2019
Research article
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14 Oct 2019
Research article | Highlight paper |  | 14 Oct 2019

Microbial community composition and abundance after millennia of submarine permafrost warming

Julia Mitzscherling, Fabian Horn, Maria Winterfeld, Linda Mahler, Jens Kallmeyer, Pier P. Overduin, Lutz Schirrmeister, Matthias Winkel, Mikhail N. Grigoriev, Dirk Wagner, and Susanne Liebner

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Pore water chemistry, grain sizes and sediment temperature of 4 sediment cores from submarine permafrost at Mamontov Klyk Cape, Laptev Sea shelf. J. Mitzscherling, F. Horn, M. Winterfeld, L. Mahler, J. Kallmeyer, P. P. Overduin, M. Winkel, M. N. Grigoriev, D. Wagner, and S. Liebner https://doi.pangaea.de/10.1594/PANGAEA.895292

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Short summary
Permafrost temperatures increased substantially at a global scale, potentially altering microbial assemblages involved in carbon mobilization before permafrost thaws. We used Arctic Shelf submarine permafrost as a natural laboratory to investigate the microbial response to long-term permafrost warming. Our work shows that millennia after permafrost warming by > 10 °C, microbial community composition and population size reflect the paleoenvironment rather than a direct effect through warming.
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