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dc.contributor.author
Toneatti, Diego
dc.contributor.author
Albarracín, Virginia Helena
dc.contributor.author
Flores, Maria R.
dc.contributor.author
Polerecky, Lubos
dc.contributor.author
Farias, Maria Eugenia
dc.date.available
2018-02-28T20:41:55Z
dc.date.issued
2017-04
dc.identifier.citation
Toneatti, Diego; Albarracín, Virginia Helena; Flores, Maria R.; Polerecky, Lubos; Farias, Maria Eugenia; Stratified bacterial diversity along physico-chemical gradients in high-altitude modern stromatolites; Frontiers; Frontiers in Microbiology; 8; 4-2017; 1-12
dc.identifier.uri
http://hdl.handle.net/11336/37500
dc.description.abstract
At an altitude of 3,570 m, the volcanic lake Socompa in the Argentinean Andes is presently the highest site where actively forming stromatolite-like structures have been reported. Interestingly, pigment and microsensor analyses performed through the different layers of the stromatolites (50 mm-deep) showed steep vertical gradients of light and oxygen, hydrogen sulfide and pH in the porewater. Given the relatively good characterization of these physico-chemical gradients, the aim of this follow-up work was to specifically address how the bacterial diversity stratified along the top six layers of the stromatolites which seems the most metabolically important and diversified zone of the whole microbial community. We herein discussed how, in only 7 mm, a drastic succession of metabolic adaptations occurred: i.e., microbial communities shift from a UV-high/oxic world to an IR-low/anoxic/high H2S environment which force stratification and metabolic specialization of the bacterial community, thus, modulating the chemical faces of the Socompa stromatolites. The oxic zone was dominated by Deinococcus sp. at top surface (0.3 mm), followed by a second layer of Coleofasciculus sp. (0.3 to ~2 mm). Sequences from anoxygenic phototrophic Alphaproteobacteria, along with an increasing diversity of phyla including Bacteroidetes, Spirochaetes were found at middle layers 3 and 4. Deeper layers (5-7 mm) were mostly occupied by sulfate reducers of Deltaproteobacteria, Bacteroidetes and Firmicutes, next to a high diversity and equitable community of rare, unclassified and candidate phyla. This analysis showed how microbial communities stratified in a physicochemical vertical profile and according to the light source. It also gives an insight of which bacterial metabolic capabilities might operate and produce a microbial cooperative strategy to thrive in one of the most extreme environments on Earth.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Frontiers
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
16s Rrna Amplicon Sequencing
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Extremophiles
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High-Altitude Lakes
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Stromatolites
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Uv Radiation
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Otras Ciencias Biológicas
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Ciencias Biológicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Stratified bacterial diversity along physico-chemical gradients in high-altitude modern stromatolites
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-12-04T18:00:08Z
dc.identifier.eissn
1664-302X
dc.journal.volume
8
dc.journal.pagination
1-12
dc.journal.pais
Suiza
dc.description.fil
Fil: Toneatti, Diego. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Planta Piloto de Procesos Industriales Microbiologicos; Argentina
dc.description.fil
Fil: Albarracín, Virginia Helena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Planta Piloto de Procesos Industriales Microbiologicos; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; Argentina
dc.description.fil
Fil: Flores, Maria R.. Utrecht University; Países Bajos
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Fil: Polerecky, Lubos. Utrecht University; Países Bajos
dc.description.fil
Fil: Farias, Maria Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucuman. Planta Piloto de Procesos Industriales Microbiologicos; Argentina
dc.journal.title
Frontiers in Microbiology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.3389/fmicb.2017.00646
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.frontiersin.org/articles/10.3389/fmicb.2017.00646/full


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