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Biogeosciences An interactive open-access journal of the European Geosciences Union
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Volume 13, issue 7 | Copyright
Biogeosciences, 13, 2207-2219, 2016
https://doi.org/10.5194/bg-13-2207-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 15 Apr 2016

Research article | 15 Apr 2016

Metagenomic analyses of the late Pleistocene permafrost – additional tools for reconstruction of environmental conditions

Elizaveta Rivkina1, Lada Petrovskaya2, Tatiana Vishnivetskaya1,3, Kirill Krivushin1, Lyubov Shmakova1, Maria Tutukina4,7, Arthur Meyers3, and Fyodor Kondrashov4,5,6 Elizaveta Rivkina et al.
  • 1Institute of Physicochemical and Biological Problems in Soil Science, Russian Academy of Sciences, Pushchino, Russia
  • 2Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, Russia
  • 3University of Tennessee, Center for Environmental Biotechnology, Knoxville, USA
  • 4Bioinformatics and Genomics Programme, Centre for Genomic Regulation (CRG), Barcelona, Spain
  • 5Universitat Pompeu Fabra (UPF), Barcelona, Spain
  • 6Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
  • 7Institute of Cell Biophysics, Russian Academy of Sciences, Pushchino, Russia

Abstract. A comparative analysis of the metagenomes from two 30000-year-old permafrost samples, one of lake-alluvial origin and the other from late Pleistocene Ice Complex sediments, revealed significant differences within microbial communities. The late Pleistocene Ice Complex sediments (which have been characterized by the absence of methane with lower values of redox potential and Fe2+ content) showed a low abundance of methanogenic archaea and enzymes from both the carbon and nitrogen cycles, but a higher abundance of enzymes associated with the sulfur cycle. The metagenomic and geochemical analyses described in the paper provide evidence that the formation of the sampled late Pleistocene Ice Complex sediments likely took place under much more aerobic conditions than lake-alluvial sediments.

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A comparative analysis of the metagenomes from two 30,000-year-old permafrost samples, one of lake-alluvial origin and the other from late Pleistocene Ice Complex sediments, revealed significant differences within microbial communities. The late Pleistocene Ice Complex sediments (which are characterized by the absence of methane with lower values of redox potential and Fe2+ content) showed both a low abundance of methanogenic archaea and enzymes from the carbon, nitrogen, and sulfur cycles.
A comparative analysis of the metagenomes from two 30,000-year-old permafrost samples, one of...
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