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Award Abstract #9815512
Collaborative Research: Microbial Life within the Extreme Environment Posed by Permanent Antarctic Lake Ice
| NSF Org: |
ANT
Antarctic Sciences Division
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| Initial Amendment Date: |
August 26, 1998 |
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| Latest Amendment Date: |
August 26, 1998 |
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| Award Number: |
9815512 |
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| Award Instrument: |
Standard Grant |
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| Program Manager: |
Polly A. Penhale
ANT Antarctic Sciences Division
OPP Office of Polar Programs
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| Start Date: |
August 15, 1998 |
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| Expires: |
July 31, 2002 (Estimated) |
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| Awarded Amount to Date: |
$160799 |
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| Investigator(s): |
John Priscu jpriscu@montana.edu (Principal Investigator)
Edward Adams (Co-Principal Investigator)
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| Sponsor: |
Montana State University
309 MONTANA HALL
BOZEMAN, MT 59717 406/994-2381
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| NSF Program(s): |
LIFE IN EXTREME ENVIRONMENTS
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| Field Application(s): |
0311000 Polar Programs-Related
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| Program Reference Code(s): |
EGCH, 9169
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| Program Element Code(s): |
1075
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ABSTRACT
9815512 PRISCU Three to twenty meter thick permanent ice covers on lakes in the McMurdo Dry Valleys, Antarctic contain viable microbial cells in association with sediment aggregates. These aggregates are now recognized as sites where physical, chemical and biological interactions promote microbial growth under extreme conditions inherent to the ice environment. This interdisciplinary research program will define specific processes which allow (1) the creation of liquid water (the essential element for life) in the permanent ice, (2) the survival and structuring of microbial populations subjected to freezing and thawing, (3) the production of substances which alter the physical attributes of the ice crystal habitat and (4) nutrient supply to the microbial populations which is essential for not only survival, but net microbial growth and biomass accumulation. The work will be on ice aggregates embedded within the permanent ice covers on the lakes in the Taylor Valley, which have been tentatively characterized in previous studies. Research on microbes in permanent ice provides information on the ecology of microbes in ice ecosystems and promises to have biotechnological implications. Furthermore, these studies will provide insights into the conditions, which support or have supported life beyond our own planet in association with water ice which is currently present within and beyond our own solar system.
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