globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1919287117
论文题名:
Hydrocarbon seepage in the deep seabed links subsurface and seafloor biospheres
作者: Chakraborty A.; Emil Ruff S.; Dong X.; Ellefson E.D.; Li C.; Brooks J.M.; McBee J.; Bernard B.B.; Hubert C.R.J.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:20
起始页码: 11029
结束页码: 11037
语种: 英语
英文关键词: Deep biosphere ; Dispersal ; Microbiome
Scopus关键词: alkane ; hydrocarbon ; organic matter ; petroleum ; hydrocarbon ; RNA 16S ; sea water ; Aminicenantes ; archaeon ; Article ; Atribacteria ; bacterium ; biosphere ; controlled study ; deep sea ; Gulf of Mexico ; metagenome ; microbial community ; microbial diversity ; microbial genome ; nonhuman ; population dispersal ; prediction ; priority journal ; sediment ; Sulfurovum ; Thermoprofundales ; biodiversity ; chemistry ; classification ; genetics ; metabolism ; metagenomics ; microbiology ; microflora ; phylogeny ; physiology ; Alkanes ; Archaea ; Bacteria ; Biodiversity ; Geologic Sediments ; Gulf of Mexico ; Hydrocarbons ; Metagenome ; Metagenomics ; Microbiota ; Petroleum ; Phylogeny ; RNA, Ribosomal, 16S ; Seawater
英文摘要: Marine cold seeps transmit fluids between the subseafloor and seafloor biospheres through upward migration of hydrocarbons that originate in deep sediment layers. It remains unclear how geofluids influence the composition of the seabed microbiome and if they transport deep subsurface life up to the surface. Here we analyzed 172 marine surficial sediments from the deep-water Eastern Gulf of Mexico to assess whether hydrocarbon fluid migration is a mechanism for upward microbial dispersal. While 132 of these sediments contained migrated liquid hydrocarbons, evidence of continuous advective transport of thermogenic alkane gases was observed in 11 sediments. Gas seeps harbored distinct microbial communities featuring bacteria and archaea that are well-known inhabitants of deep biosphere sediments. Specifically, 25 distinct sequence variants within the uncultivated bacterial phyla Atribacteria and Aminicenantes and the archaeal order Thermoprofundales occurred in significantly greater relative sequence abundance along with well-known seep-colonizing members of the bacterial genus Sulfurovum, in the gas-positive sediments. Metabolic predictions guided by metagenome-assembled genomes suggested these organisms are anaerobic heterotrophs capable of nonrespiratory breakdown of organic matter, likely enabling them to inhabit energy-limited deep subseafloor ecosystems. These results point to petroleum geofluids as a vector for the advection-assisted upward dispersal of deep biosphere microbes from subsurface to surface environments, shaping the microbiome of cold seep sediments and providing a general mechanism for the maintenance of microbial diversity in the deep sea. © 2020 National Academy of Sciences. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164211
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作者单位: Chakraborty, A., Department of Biological Sciences, University of Calgary, Calgary, AB T2N 1N4, Canada; Emil Ruff, S., Department of Geoscience, University of Calgary, Calgary, AB T2N 1N4, Canada, Ecosystems Center and J. Bay Paul Center for Comparative Molecular Biology and Evolution, Marine Biological Laboratory, Woods Hole, MA 02543, United States; Dong, X., Department of Biological Sciences, University of Calgary, Calgary, AB T2N 1N4, Canada, School of Marine Sciences, Sun Yat-Sen University, Zhuhai, 519082, China, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519000, China; Ellefson, E.D., Department of Biological Sciences, University of Calgary, Calgary, AB T2N 1N4, Canada, Department of Geoscience, University of Calgary, Calgary, AB T2N 1N4, Canada; Li, C., Department of Biological Sciences, University of Calgary, Calgary, AB T2N 1N4, Canada; Brooks, J.M., TDI-Brooks International, College Station, TX 77845, United States; McBee, J., TDI-Brooks International, College Station, TX 77845, United States; Bernard, B.B., TDI-Brooks International, College Station, TX 77845, United States; Hubert, C.R.J., Department of Biological Sciences, University of Calgary, Calgary, AB T2N 1N4, Canada

Recommended Citation:
Chakraborty A.,Emil Ruff S.,Dong X.,et al. Hydrocarbon seepage in the deep seabed links subsurface and seafloor biospheres[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(20)
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