Metagenomics of Hydrocarbon Resource Environments Indicates Aerobic Taxa and Genes to be Unexpectedly Common
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- 作者：Dongshan An ; Sean M. Caffrey ; Jung Soh ; Akhil Agrawal ; Damon Brown ; Karen Budwill ; Xiaoli Dong ; Peter F. Dunfield ; Julia Foght ; Lisa M. Gieg ; Steven J. Hallam ; Niels W. Hanson ; Zhiguo He ; Thomas R. Jack ; Jonathan Klassen ; Kishori M. Konwar ; Eugene Kuatsjah ; Carmen Li ; Steve Larter ; Verlyn Leopatra ; Camilla L. Nesb酶 ; Thomas Oldenburg ; Antoine P. Pag茅 ; Esther Ramos-Padron ; Fauziah F. Rochman ; Alireeza Saidi-Mehrabad ; Christoph W. Sensen ; Payal Sipahimalani ; Young C. Song ; Sandra Wilson ; Gregor Wolbring ; Man-Ling Wong ; Gerrit Voordouw
- 刊名：Environmental Science & Technology
- 出版年：2013
- 出版时间：September 17, 2013
- 年：2013
- 卷：47
- 期：18
- 页码：10708-10717
- 全文大小：449K
- 年卷期：v.47,no.18(September 17, 2013)
- ISSN：1520-5851
文摘
Oil in subsurface reservoirs is biodegraded by resident microbial communities. Water-mediated, anaerobic conversion of hydrocarbons to methane and CO2, catalyzed by syntrophic bacteria and methanogenic archaea, is thought to be one of the dominant processes. We compared 160 microbial community compositions in ten hydrocarbon resource environments (HREs) and sequenced twelve metagenomes to characterize their metabolic potential. Although anaerobic communities were common, cores from oil sands and coal beds had unexpectedly high proportions of aerobic hydrocarbon-degrading bacteria. Likewise, most metagenomes had high proportions of genes for enzymes involved in aerobic hydrocarbon metabolism. Hence, although HREs may have been strictly anaerobic and typically methanogenic for much of their history, this may not hold today for coal beds and for the Alberta oil sands, one of the largest remaining oil reservoirs in the world. This finding may influence strategies to recover energy or chemicals from these HREs by in situ microbial processes.