Archaea in organic-lean and organic-rich marine subsurface sediments: an environmental gradient reflected in distinct phylogenetic lineages

Type Article
Date 2012
Language English
Author(s) Durbin Alan M.1, Teske Andreas2
Affiliation(s) 1 : Department of Ecology and Evolutionary Biology, University of California Irvine, Irvine, CA, USA
2 : Department of Marine Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
Source Frontiers In Microbiology (1664-302X), 2012 , Vol. 3 , N. 168 , P. 1-26
DOI 10.3389/fmicb.2012.00168
WOS© Times Cited 73
Keyword(s) archaea, marine sediments, oligotrophy, subsurface, phylogeny, uncultured archaea
Abstract 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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