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Microbiology: lessons from a first attempt at Lake Ellsworth.

D A Pearce1, I Magiopoulos2, M Mowlem2

  • 1Department of Applied Sciences, Faculty of Health and Life Sciences, University of Northumbria, Ellison Building, Newcastle upon Tyne NE1 8ST, UK British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK Department of Arctic Biology, University Centre in Svalbard, Longyearbyen 9171, Norway david.pearce@northumbria.ac.uk.

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|December 16, 2015
PubMed
Summary

Accessing Antarctic subglacial lakes like Lake Ellsworth requires strict cleanliness protocols. Lessons learned highlight challenges in sterilization and sample handling for future deep Antarctic exploration.

Keywords:
Antarctic environmentsEllsworthdeep ice drillingmicrobiologysterile technologiessubglacial lakes

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Area of Science:

  • Microbiology
  • Antarctic Science
  • Astrobiology

Background:

  • Direct access to Subglacial Lake Ellsworth in 2012-2013 presented significant microbiological challenges.
  • Understanding microbial contamination risks is crucial for exploring pristine subglacial environments.

Purpose of the Study:

  • To analyze microbiological data from the Subglacial Lake Ellsworth access mission.
  • To identify limitations in current microbiological principles for subglacial lake exploration.
  • To provide recommendations for future Antarctic subglacial exploration missions.

Main Methods:

  • Microbiological analyses of drilling equipment, scientific instrumentation, and the field camp environment.
  • Evaluation of cleanliness and sterilization procedures implemented during hot water drilling.
  • Comparison of microbial data with other Antarctic lake systems.

Main Results:

  • Five core challenges in maintaining cleanliness during subglacial lake access were identified.
  • The effectiveness of field sterilization and sample handling methods was assessed.
  • Microbial biodiversity around the Antarctic drilling site was characterized.

Conclusions:

  • Future Antarctic subglacial exploration requires enhanced environmental assessment and sterility considerations.
  • In situ biodiversity detection is recommended to mitigate contamination risks.
  • Further research is needed to understand the role of subglacial microbes in Antarctic ecosystems.