High Prevalence of Gammaproteobacteria in the Sediments of Admiralty Bay and North Bransfield Basin, Northwestern Antarctic Peninsula

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dc.citation.volume8
dc.contributor.authorFranco, Diego C.
dc.contributor.authorSignori, Camila N.
dc.contributor.authorDuarte, Rubens T. D.
dc.contributor.authorNakayama, Cristina R. [UNIFESP]
dc.contributor.authorCampos, Lucia S.
dc.contributor.authorPellizari, Vivian H.
dc.coverageLausanne
dc.date.accessioned2020-07-17T14:03:00Z
dc.date.available2020-07-17T14:03:00Z
dc.date.issued2017
dc.description.abstractMicroorganisms dominate most Antarctic marine ecosystems, in terms of biomass and taxonomic diversity, and play crucial role in ecosystem functioning due to their high metabolic plasticity. Admiralty Bay is the largest bay on King George Island (South Shetland Islands, Antarctic Peninsula) and a combination of hydro-oceanographic characteristics (bathymetry, sea ice and glacier melting, seasonal entrance of water masses, turbidity, vertical fluxes) create conditions favoring organic carbon deposition on the seafloor and microbial activities. We sampled surface sediments from 15 sites across Admiralty Bay (100502 m total depth) and the adjacent North Bransfield Basin (6931147 m), and used the amplicon 454-sequencing of 16S rRNA gene tags to compare the bacterial composition, diversity, and microbial community structure across environmental parameters (sediment grain size, pigments and organic nutrients) between the two areas. Marine sediments had a high abundance of heterotrophic Gammaproteobacteria (92.4% and 83.8% inside and outside the bay, respectively), followed by Alphaproteobacteria (2.5 and 5.5%), Firmicutes (1.5 and 1.6%), Bacteroidetes (1.1 and 1.7%), Deltaproteobacteria (0.8 and 2.5%) and Actinobacteria (0.7 and 1.3%). Differences in alpha-diversity and bacterial community structure were found between the two areas, reflecting the physical and chemical differences in the sediments, and the organic matter input.en
dc.description.affiliationUniv Sao Paulo, Inst Oceanog, Dept Oceanog Biol, Sao Paulo, Brazil
dc.description.affiliationUniv Fed Santa Catarina, Ctr Ciencias Biol, Florianopolis, SC, Brazil
dc.description.affiliationUniv Fed Sao Paulo, Inst Ciencias Ambientais Quim & Farmaceut, Dept Ciencias Ambientais, Diadema, Brazil
dc.description.affiliationUniv Fed Rio de Janeiro, Inst Biol, Dept Zool, Rio De Janeiro, Brazil
dc.description.affiliationUnifespUniv Fed Sao Paulo, Inst Ciencias Ambientais Quim & Farmaceut, Dept Ciencias Ambientais, Diadema, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipBrazilian National Council for Scientific and Technological Development - CNPq (MABIREH/IPY/CAML)
dc.description.sponsorshipCAPES-Master's fellowship
dc.description.sponsorshipIDCNPq (MABIREH/IPY/CAML): 520293/2006-1
dc.format.extent-
dc.identifierhttp://dx.doi.org/10.3389/fmicb.2017.00153
dc.identifier.citationFrontiers In Microbiology. Lausanne, v. 8, p. -, 2017.
dc.identifier.doi10.3389/fmicb.2017.00153
dc.identifier.fileWOS000393138100001.pdf
dc.identifier.issn1664-302X
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/55123
dc.identifier.wosWOS:000393138100001
dc.language.isoeng
dc.publisherFrontiers Media Sa
dc.relation.ispartofFrontiers In Microbiology
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectmarine sedimentsen
dc.subjectmicrobial diversityen
dc.subjectbacterial community structureen
dc.subjectAntarcticaen
dc.subjectpolar microbiologyen
dc.titleHigh Prevalence of Gammaproteobacteria in the Sediments of Admiralty Bay and North Bransfield Basin, Northwestern Antarctic Peninsulaen
dc.typeinfo:eu-repo/semantics/article
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