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dc.contributor.authorSRAIN, BENJAMÍN
dc.contributor.authorPANTOJA, SILVIO
dc.contributor.authorQUIÑONES, RENATO A
dc.contributor.authorLEVIPAN, HÉCTOR A
dc.contributor.authorSepulveda, Julio C
dc.contributor.authorSummons, Roger E
dc.date.accessioned2018-05-09T17:44:22Z
dc.date.available2018-05-09T17:44:22Z
dc.date.issued2015-06
dc.identifier.issn0717-6538
dc.identifier.urihttp://hdl.handle.net/1721.1/115262
dc.description.abstractOrganic biomarkers were used to investigate the infl uence of seasonal changes in oxygenation and water chemistry on the distribution of archaea and bacteria in the water column and surface sediments of the continental shelf off central Chile (ca. 36°S), an area infl uenced by seasonal upwelling and the development of an oxygen minimum zone. We were interested in establishing if occurrence of archaea and bacteria responds to oxygenation and water chemistry for which we analyzed archaeal isoprenoid (i) and bacterial branched (br) glycerol dialkyl glycerol tetraethers (GDGTs). Our results combined with molecular data from a year round observational program at the same sampling site and depths indicatives the occurrence and dominance of the marine pelagic group Thaumarchaeota. Changes in the distribution of iGDGTs might be explained by (i) the presence of archaeal populations in sub-oxic waters, phylogenetically different from those in surface water, (ii) changes in the relative contribution of Euryarchaeota with depth, and (iii) a relationship between Thaumarchaeota and environmental factors other than temperature. Branched GDGTs were more abundant in the upper, oxic layer during the non-upwelling season, may be a result of higher river runoff, whereas their diversity was higher within sub-oxic waters. Our results indicate a vertical segregation of iGDGTs and brGDGTs, with predominance of archaeal biomarkers during the low productivity season. KEYWORDS: Glycerol dialkyl glycerol tetraethers (GDGTs); archaea; bacteria; oxygen minimum zone; upwelling; Chileen_US
dc.publisherSciELO Comision Nacional de Investigacion Cientifica Y Tecnologica (CONICYT)en_US
dc.relation.isversionofhttp://dx.doi.org/10.4067/S0717-65382015000100005en_US
dc.rightsCreative Commons Attribution 4.0 International Licenseen_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_US
dc.sourceSciELOen_US
dc.titleArchaeal and bacterial assemblages in the Oxygen Minimum Zone of the upwelling ecosystem off Central Chile as determined by organic biomarkersen_US
dc.typeArticleen_US
dc.identifier.citationSRAIN, BENJAMÍN et al. “Archaeal and Bacterial Assemblages in the Oxygen Minimum Zone of the Upwelling Ecosystem Off Central Chile as Determined by Organic Biomarkers.” Gayana (Concepción) 79, 1 (June 2015): 26–44 © 2015 Universidad de Concepcionen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciencesen_US
dc.contributor.mitauthorSepulveda, Julio C
dc.contributor.mitauthorSummons, Roger E
dc.relation.journalGayana (Concepción)en_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dc.date.updated2018-05-09T16:53:04Z
dspace.orderedauthorsSRAIN, BENJAMÍN; SEPÚLVEDA, JULIO; PANTOJA, SILVIO; SUMMONS, ROGER E; QUIÑONES, RENATO A; LEVIPAN, HÉCTOR Aen_US
dspace.embargo.termsNen_US
dc.identifier.orcidhttps://orcid.org/0000-0002-7144-8537
mit.licensePUBLISHER_CCen_US


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