Microbiology: lessons from a first attempt at Lake Ellsworth

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.