期刊
FRONTIERS IN MICROBIOLOGY
卷 3, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fmicb.2012.00168
关键词
archaea; marine sediments; oligotrophy; subsurface; phylogeny; uncultured archaea
类别
资金
- NSF (NSF-Ocean Drilling Program) [0527167]
- Hanse Institute Fellowship
- Center for Dark Energy Biosphere Investigations (C-DEBI)
- NASA Astrobiology Institutes [NCC 2-1054, NCC 2-1275]
- Division Of Ocean Sciences
- Directorate For Geosciences [0527167] Funding Source: National Science Foundation
Examining the patterns of archaeal diversity in little-explored organic-lean marine subsurface sediments presents an opportunity to study the association of phylogenetic affiliation and habitat preference in uncultured marine Archaea. Here we have compiled and re-analyzed published archaeal 16S rRNA clone library datasets across a spectrum of sediment trophic states characterized by a wide range of terminal electron-accepting processes. Our results show that organic-lean marine sediments in deep marine basins and oligotrophic open ocean locations are inhabited by distinct lineages of archaea that are not found in the more frequently studied, organic-rich continental margin sediments. We hypothesize that different combinations of electron donor and acceptor concentrations along the organic-rich/organic-lean spectrum result in distinct archaeal communities, and propose an integrated classification of habitat characteristics and archaeal community structure.
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