Navigation Links
UIC scientists find ancient microbes in salty, ice-sealed Antarctic lake
Date:11/26/2012

Shedding light on the limits of life in extreme environments, scientists have discovered abundant and diverse metabolically active bacteria in the brine of an Antarctic lake sealed under more than 65 feet of ice.

The finding, described in this week's issue of the Proceedings of the National Academy of Sciences, is surprising because previous studies indicate that the brine has been isolated from the surface environment -- and external sources of energy -- for at least 2,800 years, according to two of the report's authors, Peter Doran and Fabien Kenig, both professors of earth and environmental sciences at the University of Illinois at Chicago.

"This provides us with new boundary conditions on the limits for life," said Doran. "The low temperature or high salinity on their own are limiting, but combined with an absence of solar energy or any new inputs from the atmosphere, they make this a very tough place to make a living."

The researchers drilled out cores of ice, using sanitary procedures and equipment. They collected samples of brine within the ice and assessed its chemical qualities and potential for sustaining life.

They found that the brine is oxygen-free, slightly acidic, and contains high levels of organic carbon, molecular hydrogen, and both oxidized and reduced compounds. The findings were unexpected because of the extremely salty, dark, cold, isolated ecosystem within the ice.

"Geochemical analyses suggest that chemical reactions between the brine and the underlying sediment generate nitrous oxide and molecular hydrogen," said Kenig. "The hydrogen may provide some of the energy needed to support microbes."

"We'd like to go back and find if there is a proper body of brine without ice down there," said Doran. "We'd also like to get some sediment cores from below that to better establish the history of the lake. In the meantime, we are using radar and other geophysical techniques to probe what lies beneath."

The research was conducted with Alison Murray and colleagues at the Desert Research Institute and scientists at other institutes.


'/>"/>

Contact: Anne Brooks Ranallo
annebr@sbcglobal.net
312-355-2523
University of Illinois at Chicago
Source:Eurekalert

Related biology news :

1. Genome decoded: Scientists find clues to more disease-resistant watermelons
2. Scientists from Bangalore and Mainz develop new methods for cooling of ions
3. Scripps Research Institute scientists describe elusive replication machinery of flu viruses
4. It takes two to tangle: Wistar scientists further unravel telomere biology
5. Scientists improve dating of early human settlement
6. Barrow scientists discover ways to optimize light sources for vision
7. WSU scientists find new way for antibiotic resistance to spread
8. NIH awards Penn scientists $10 million over 5 years for innovative research on single cells
9. Scientists question the designation of some emerging diseases
10. Watching the developing brain, scientists glean clues on neurological disorder
11. Scientists take objective look at terms least toxic pesticides applied as last resort
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/16/2016)... 16, 2016   EyeLock LLC , a market ... opening of an IoT Center of Excellence in ... the development of embedded iris biometric applications. ... convenience and security with unmatched biometric accuracy, making it ... from DNA. EyeLock,s platform uses video technology to deliver ...
(Date:5/9/2016)... UAE, May 9, 2016 Elevay ... comes to expanding freedom for high net worth professionals ... in today,s globally connected world, there is still no ... could ever duplicate sealing your deal with a firm ... passports by taking advantage of citizenship via investment programs ...
(Date:4/28/2016)... FRANCISCO and BANGALORE, India , ... of EdgeVerve Systems, a product subsidiary of Infosys (NYSE: ... provider, today announced a global partnership that will ... way to use mobile banking and payment services. ... is a key innovation area for financial services, but it ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... June 23, 2016 Houston Methodist Willowbrook ... Cy-Fair Sports Association to serve as their official ... Houston Methodist Willowbrook will provide sponsorship support, athletic ... with association coaches, volunteers, athletes and families. ... Cy-Fair Sports Association and to bring Houston Methodist ...
(Date:6/23/2016)... , June 23, 2016   EpiBiome , ... secured $1 million in debt financing from Silicon Valley ... up automation and to advance its drug development efforts, ... new facility. "SVB has been an incredible ... the services a traditional bank would provide," said Dr. ...
(Date:6/23/2016)... 2016 Apellis Pharmaceuticals, Inc. today announced ... of its complement C3 inhibitor, APL-2. The trials ... dose studies designed to assess the safety, tolerability, ... in healthy adult volunteers. Forty subjects ... single dose (ranging from 45 to 1,440mg) or ...
(Date:6/23/2016)... ... June 23, 2016 , ... ClinCapture, the only ... Center and will showcase its product’s latest features from June 26 to June ... scientific poster on Disrupting Clinical Trials in The Cloud during the conference. ...
Breaking Biology Technology: