Affordable Access

deepdyve-link
Publisher Website

Biogeochemical Characteristics of Earth's Volcanic Permafrost: An Analog of Extraterrestrial Environments.

Authors
  • Vishnivetskaya, Tatiana A1, 2
  • Mironov, Vasiliy A1
  • Abramov, Andrey A1
  • Shcherbakova, Viktoria A3
  • Rivkina, Elizaveta M1, 4
  • 1 Institute of Physicochemical and Biological Problems in Soil Science, Federal Research Center "Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences," Pushchino, Russia.
  • 2 Center for Environmental Biotechnology, University of Tennessee, Knoxville, Tennessee, USA.
  • 3 Skryabin Institute of Biochemistry and Physiology of Microorganisms, Federal Research Center "Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences," Pushchino, Russia.
  • 4 Institute of Geography, Russian Academy of Sciences, Moscow, 119017, Russia.
Type
Published Article
Journal
Astrobiology
Publisher
Mary Ann Liebert
Publication Date
Jul 01, 2022
Volume
22
Issue
7
Pages
812–828
Identifiers
DOI: 10.1089/ast.2021.0137
PMID: 35333595
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

This article describes a study of frozen volcanic deposits collected from volcanoes Tolbachik and Bezymianny on the Kamchatka Peninsula, Russia, and Deception Island volcano, Antarctica. In addition, we studied suprasnow ash layers deposited after the 2007 eruptions of volcanoes Shiveluch and Bezymianny on Kamchatka. The main objectives were to characterize the presence and survivability of thermophilic microorganisms in perennially frozen volcanic deposits. As opposed to permafrost from the polar regions, viable thermophiles were detected in volcanic permafrost by cultivation, microscopy, and sequencing. In the permafrost of Tolbachik volcano, we observed methane formation by both psychrophilic and thermophilic methanogenic archaea, while at 37°C, methane production was noticeably lower. Thermophilic bacteria isolated from volcanic permafrost from the Deception Island were 99.93% related to Geobacillus stearothermophilus. Our data showed biological sulfur reduction to sulfide at 85°C and even at 130°C, where hyperthermophilic archaea of the genus Thermoproteus were registered. Sequences of hyperthermophilic bacteria of the genus Caldicellulosiruptor were discovered in clone libraries from fresh volcanic ash deposited on snow. Microorganisms found in volcanic terrestrial permafrost may serve as a model for the alien inhabitants of Mars, a cryogenic planet with numerous volcanoes. Thermophiles and hyperthermophiles and their metabolic processes represent a guideline for the future exploration missions on Mars.

Report this publication

Statistics

Seen <100 times