Phylogenetic and Functional Diversity of Microbial Communities Associated with Subsurface Sediments of the Sonora Margin, Guaymas Basin
- UMR6197, ZI de la pointe du Diable, Plouzane (France). Laboratoire de Microbiologie des Environnements Extremes. Ifremer; Universite de Bretagne Occidentale, Plouzane (France). UMR6197, ZI de la pointe du Diable. Laboratoire de Microbiologie des Environnements Extreme. Centre National de la Recherche Scientifique (CNRS); DOE/OSTI
- UMR6197, ZI de la pointe du Diable, Plouzane (France). Laboratoire de Microbiologie des Environnements Extremes. Ifremer; Universite de Bretagne Occidentale, Plouzane (France). UMR6197, ZI de la pointe du Diable. Laboratoire de Microbiologie des Environnements Extreme. Centre National de la Recherche Scientifique (CNRS)
- Cardiff University (United Kingdom)
- UMR6197, ZI de la pointe du Diable, Plouzane (France). Laboratoire Etude des Environnements Profonds. Ifremer
- UMR6197, ZI de la pointe du Diable, Plouzane (France). Laboratoire de Microbiologie des Environnements Extremes. Ifremer; Universite de Bretagne Occidentale, Plouzane (France). UMR6197, ZI de la pointe du Diable. Laboratoire de Microbiologie des Environnements Extreme. Centre National de la Recherche Scientifique (CNRS); Universite de Brest, Plouzane (France). Domaines Oce´aniques IUEM. UMR6538
- ZI de la pointe du Diable, Plouzane (France). Laboratoire des Environnements Sedimentaires. Geosciences Marines. Ifremer
- University of Oklahoma, Norman, OK (United States)
- University of Oklahoma, Norman, OK (United States); Tsinghua University, Beijing (China); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Subsurface sediments of the Sonora Margin (Guaymas Basin), located in proximity of active cold seep sites were explored. The taxonomic and functional diversity of bacterial and archaeal communities were investigated from 1 to 10 meters below the seafloor. Microbial community structure and abundance and distribution of dominant populations were assessed using complementary molecular approaches (Ribosomal Intergenic Spacer Analysis, 16S rRNA libraries and quantitative PCR with an extensive primers set) and correlated to comprehensive geochemical data. Moreover the metabolic potentials and functional traits of the microbial community were also identified using the GeoChip functional gene microarray and metabolic rates. The active microbial community structure in the Sonora Margin sediments was related to deep subsurface ecosystems (Marine Benthic Groups B and D, Miscellaneous Crenarchaeotal Group, Chloroflexi and Candidate divisions) and remained relatively similar throughout the sediment section, despite defined biogeochemical gradients. However, relative abundances of bacterial and archaeal dominant lineages were significantly correlated with organic carbon quantity and origin. Consistently, metabolic pathways for the degradation and assimilation of this organic carbon as well as genetic potentials for the transformation of detrital organic matters, hydrocarbons and recalcitrant substrates were detected, suggesting that chemoorganotrophic microorganisms may dominate the microbial community of the Sonora Margin subsurface sediments.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- French Research Institute for Exploitation of the Sea (IFREMER); USDOE Office of Science (SC), Biological and Environmental Research (BER)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1627721
- Journal Information:
- PLoS ONE, Journal Name: PLoS ONE Journal Issue: 8 Vol. 9; ISSN 1932-6203
- Publisher:
- Public Library of ScienceCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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