Microorganisms from deep, high temperature sandstones: Constraints on microbial colonization

被引:70
作者
Colwell, FS
Onstott, TC
Delwiche, ME
Chandler, D
Fredrickson, JK
Yao, QJ
McKinley, JP
Boone, DR
Griffiths, R
Phelps, TJ
Ringelberg, D
White, DC
LaFreniere, L
Balkwill, D
Lehman, RM
Konisky, J
Long, PE
机构
[1] PRINCETON UNIV, DEPT GEOL, PRINCETON, NJ 08544 USA
[2] PACIFIC NW LAB, RICHLAND, WA 99352 USA
[3] OREGON GRAD INST, BEAVERTON, OR 97006 USA
[4] OREGON STATE UNIV, DEPT FOREST SCI, FOREST SCI LAB 020, CORVALLIS, OR 97331 USA
[5] OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA
[6] UNIV TENNESSEE, CTR ENVIRONM BIOTECHNOL, KNOXVILLE, TN 37932 USA
[7] ARGONNE NATL LAB, ARGONNE, IL 60439 USA
[8] FLORIDA STATE UNIV, DEPT BIOL SCI, TALLAHASSEE, FL 32306 USA
[9] UNIV ILLINOIS, DEPT MICROBIOL, URBANA, IL 61801 USA
关键词
subsurface; microbial survival; microbial transport; sandstone; iron-reducing bacteria; fermenter;
D O I
10.1016/S0168-6445(97)00024-7
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Cores were collected from Late Cretaceous and Early Tertiary rocks in the Piceance Basin of western Colorado, USA, to investigate the origins of subsurface microorganisms under geological conditions likely to constrain microbial transport and survival. The sampled strata from 856-862, 1996-1997 and 2091-2096 m recorded peak paleotemperatures of 120-145 degrees C from 40-5 million years ago, while present temperatures range from 43 to 85 degrees C. Cores were analyzed for culturable anaerobic bacteria (Fe(III)- and Mn(IV)-reducing bacteria, fermenters, sulfate reducers, nitrate reducers and methanogens), ester-linked phospholipid fatty acid and selected enzyme and physiological activities. Measurable but low biomass (total phospholipid fatty acid) and anaerobic bacteria, primarily Fe(III) reducers and fermenters, were present in samples from the 856-862 m core; Cores from greater depths yielded only a single positive enrichment and lower biomass values. Methanogens and sulfate reducers were not detected in any of the samples nor were bacteria that could grow with methane and any added electron acceptors. I6S rRNA genes cloned from products of PCR amplification of DNA extracted from an 858 m, 65 degrees C, Fe(III)-reducing enrichment were most closely related to bacteria in the genus Desulfotomaculum, Gram-positive, spore-forming sulfate-reducing bacteria. Assuming the maximum temperatures would have eliminated any entrained bacteria, these anaerobic microorganisms likely migrated into the shallower Wasatch formation within the last 5 million years. However, the deepest stratum sampled was hydrologically isolated and lacked any indication of microbial colonization by all biological measures. Hydrologic connection to the surface, high maximum temperatures and the presence of fractures are probably the primary factors that control distribution of microorganisms in these deep rock environments.
引用
收藏
页码:425 / 435
页数:11
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