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RPL-relevant abstracts submitted by RPL team members

Experimental constraints on rates of hydrogen and methane generation in serpentinizing environments.
T. M. McCollom¹,
¹ Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80309-0600, mccollom@lasp.colorado.edu.

The Geobiology that drives a sulfur-dominated glacial spring system found in the Canadian High Arctic.
C. B. Trivedi¹, G. E. Lau², A. S. Templeton², S. E. Grasby³, & J. R. Spear¹,
¹Colorado School of Mines (1500 Illinois St., Golden, CO 80401; ctrivedi@mines.edu, jspear@mines.edu), ²²ÊÃñ±¦µä (2200 Colorado Ave., Boulder, CO 80309; astrobiologist3@gmail.com, alexis.templeton@colorado.edu), ³Geological Survey of Canada – Calgary (3303 33 Street Northwest, Calgary, AB, Canada; steve.grasby@canada.ca). 

Surface expressions of potentially habitable subsurface environments on Mars: Sulfur alteration features at Borup Fiord Pass.
G. E. Lau¹, C. B. Trivedi², S. E. Grasby³, J. R. Spear², and A. S. Templeton²,
¹²ÊÃñ±¦µä (email: astrobiologist3@gmail.com), ²Colorado School of Mines, ³Geological Survey of Canada

The role of cell membranes in coupled geochemical-bioenergetic modeling.
S. M. Som^1,2 and T. M. Hoehler^2
1Blue Marble Space Institute of Science (1001 4th ave Suite 3201, Seattle WA 98145
sanjoy@bmsis.org, ²Exobiology Branch, NASA Ames Research Center (MS
239-4, Moffett Field CA 94035 tori.m.hoehler@nasa.gov).

Geologic Constraints On Microbial Dynamics In A Subsurface Serpentinite Ecosystem.
K. R. Rempfert¹, H. M. Miller¹, N. Bompard², D. Nothaft¹, J. M. Matter², P. Kelemen³, N. Fierer⁴ and A. S. Templeton^1
1Department of Geo-logical Sciences, University of Colorado, Boulder, CO, USA, ²National Oceanography Centre, University of Southampton, U.K., ³Lamont Doherty Earth Observatory, Columbia University, Palisades, NY, U.S.A., ⁴Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, U.S.A.

Reactivity of natural and synthetic fe-bearing brucite in serpentinizing systems.
Eric T. Ellison¹ and Alexis S. Templeton¹ ,
¹ Dept. of Geological Sciences, University of Colorado –Boulder, 2200 Colorado Ave., Boulder, CO 80309 (eric.ellison@colorado.edu; alexis.templeton@colorado.edu).

Oxygen and the evolution of thermoacidophiles.
D. R. Colman¹ , S. Poudel ¹ , T. L. Hamilton ², J. R. Havig ³ , M. J. Selensky ¹ , E.L. Shock^4,5,6 , and E. S. Boyd^1,6 .
¹ Department of Microbiology and Immunology, Montana State University, Bozeman, MT 59717, daniel.colman@montana.edu, ² Department of Biological Sciences, University of Cincinatti, OH 45221, ³ Department of Geology, University of Cincinatti, Cincinatti, OH 45221, ⁴ School of Molecular Sciences Arizona State University, Tempe, Arizona 82587, ⁵ School of Earth and Space Exploration, Arizona State University, Tempe, Arizona, 85287, ⁶ NASA Astrobiology Institute, Mountain View, California 94035

Transitioning metagenomes into interactomes in a chemosynthetic sulfur-based hot spring community.
D. R. Colman¹ , M. R. Lindsay¹ , E. R. Roden ² , E. S. Boyd¹ .
¹ Department of Microbiology and Immunology, Montana State University, Bozeman, MT 59717, ² Department of Geoscience, University of Wisconsin, Madison WI, 53706

Reductive dissolution of pyrite by methanogens.
L. M. Bueter¹ , C. M. Johnson ² , B. L. Beard ² , E.E. Roden ² , and E.S. Boyd^1
1 Montana State University, Department of Microbiology and Immunology, Bozeman, MT, ² University of Wisconsin, Department of Geosciences – Madison, WI.

Energy demand, not supply, dictates microbial substrate preference.
M. A. Amenabar¹ , E. L. Shock² , E. E. Roden³ , and E. S. Boyd¹.
¹ Montana State University - Department of Microbiology and Immunology, Bozeman, MT, ² Arizona State University - School of Earth & Space Exploration and School of Molecular Sciences, Tempe, AZ, ³ University of Wisconsin - Department of Geosciences, Madison, WI.

Subsurface source and biological fate of hydrogen in hot spring ecosystems.
M. R. Lindsay¹ , K. E. Fristad ² , M . J. Amenabar ¹ , M. R. Urschel ¹ , K. M. Fecteau ³ , Randall V. Debes⁴ , John R. Spear⁵ , T. M. Hoehler^{2, 6} , E. L. Shock^{3, 4, 6} , and E. S. Boyd^{1, 6
1} Montana State University - Department of Microbiology and Immunology, Bozeman, MT, ² NASA Ames Research Center, Moffett Field, CA, Arizona State University – ³ School of Molecular Sciences, ⁴ School of Earth and Space Exploration, Tempe, AZ, ⁵ Department of Civil and Environmental Envineering Colorado School of Mines, Colden, CO, ⁶ NASA Astrobiology Institute, Mountain View, CA.

LIFE DETECTION IN BASAL ICE FROM THE GREENLAND ICE SHEET: CHALLENGES AND OPPORTUNITES.
W. Li¹ , M. L. Skidmore¹* , J. E. Dore² , M. Lindsay³ , G. Steigmeyer¹ , P. Tunby¹ , and E. S. Boyd^3
1Department of Earth Sciences, Montana State University, Bozeman, MT, USA. ² Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, MT, USA. ³ Department of Microbiology and Immunology, Montana State University, Bozeman, MT, USA. (*skidmore@montana.edu)

MINERAL DEPENDENT CHEMOLITHOTROPHY IN SUBGLACIAL SYSTEMS.
M. L. Skidmore¹* , R. Mitchell¹ , A. Steigmeyer¹ , W. van Gelder¹ , E. Dunham², E. S. Boyd^2
1Department of Earth Sciences, Montana State University, Bozeman, MT, USA. ²Department of Microbiology and Immunology, Montana State University, Bozeman, MT, USA. (*skidmore@montana.edu)

Submitted to Session: Seeking Evidence of Habitable Conditions and Life Activity in Serpentinizing Systems

Expression of metabolic pathways in microbial communities from a tropical serpentinizing environment.
K. I. Twing¹, M. Crespo-Medina², W. J. Brazelton³, R. Sanchez-Murillo⁴ and M. O. Schrenk^5
1Dept. of Biology, University of Utah, Salt Lake City, Utah; katrina.twing@utah.edu ²CECIA, Inter-American University of Puerto Rico, San Juan, Puerto Rico; melitzacm@inter.edu ³Dept. of Biology, University of Utah, Salt Lake City, Utah; william.brazelton@utah.edu ⁴School of Chemistry, National University of Costa Rica, Heredia, Costa Rica; ricardo.sanchez.murillo@una.cr ⁵Dept. of Earth and Environ. Sciences, Michigan State University, East Lansing, Michigan; schrenkm@msu.edu

Exploration of novel subsurface microbial communities within seafloor mantle rocks.
Shahrzad Motamedi¹, William J. Brazelton¹, and IODP Expedition 357 Scientific Party,
¹Department of Biology, University of Utah

DIVERSITY AND METABOLIC POTENTIAL OF MICROBIAL COMMUNITIES IN A CONTINENTAL SERPENTINITE SPRING.
E. R. Dart¹, P. L. Morrill², and W. J. Brazelton^3
1(University of Utah, Department of Biology, emily.dart@utah.edu), ²(Memorial University, Department of Earth Sciences, pmorrill@mun.ca), ³(University of Utah, Department of Biology, william.brazelton@utah.edu)

Submitted to Session: Astrobiology 'Omics'

Approaches for Identifying Subsurface-Specific Taxa in Molecular Sequence Data.
C. N. Thornton¹ and W. J. Brazelton^1
1Department of Biology, University of Utah

Metagenomic characterization of serpentinization-influenced groundwater collected at the Coast Range Ophiolite Microbial Observatory.
A. J. Hyer¹ and W. J. Brazelton^1
1University of Utah, Department of Biology, theonehyer@gmail.com

Community composition and metabolic characterization of the bonneville salt flats. 
J. M. McGonigle¹, E. R. Dart², B. Kleba³, B. B. Bowen⁴, and W. J. Brazelton^5
1(University of Utah, Department of Biology, j.mcgonigle@biology.utah.edu), ²(University of Utah, Department of Biology, emilyrdart@gmail.com), ³(Westminster College, Department of Biology, bkleba@gmail.com), ⁴(University of Utah, Department of Geology & Geophysics, brenda.bowen@utah.edu), ⁵(University of Utah, Department of Biology, william.brazelton@utah.edu)