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Microbial diversity from chlorophyll maximum, oxygen minimum and bottom zones in the southwestern Atlantic Ocean

Medina-Silva, Renata (author)
Pontificia Univ Catolica Rio Grande do Sul, Brazil
de Oliveira, Rafael R. (author)
Pontificia Univ Catolica Rio Grande do Sul, Brazil
Pivel, Maria A. G. (author)
Univ Fed Rio Grande do Sul, Brazil
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Borges, Luiz G. A. (author)
Pontificia Univ Catolica Rio Grande do Sul, Brazil
Simao, Taiz L. L. (author)
Pontificia Univ Catolica Rio Grande do Sul, Brazil
Pereira, Leandro M. (author)
Pontificia Univ Catolica Rio Grande do Sul, Brazil
Trindade, Fernanda J. (author)
Pontificia Univ Catolica Rio Grande do Sul, Brazil
Augustin, Adolpho H. (author)
Pontificia Univ Catolica Rio Grande do Sul, Brazil
Valdez, Fernanda P. (author)
Pontificia Univ Catolica Rio Grande do Sul, Brazil
Eizirik, Eduardo (author)
Pontificia Univ Catolica Rio Grande do Sul, Brazil
Utz, Laura R. P. (author)
Pontificia Univ Catolica Rio Grande do Sul, Brazil
Groposo, Claudia (author)
Petrobras SA, Brazil
Miller, Dennis J. (author)
Petrobras SA, Brazil
Viana, Adriano R. (author)
Petrobras SA, Brazil
Ketzer, João Marcelo (author)
Pontificia Univ Catolica Rio Grande do Sul, Brazil
Giongo, Adriana (author)
Pontificia Univ Catolica Rio Grande do Sul, Brazil
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 (creator_code:org_t)
Elsevier, 2018
2018
English.
In: Journal of Marine Systems. - : Elsevier. - 0924-7963 .- 1879-1573. ; 178, s. 52-61
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Conspicuous physicochemical vertical stratification in the deep sea is one of the main forces driving microbial diversity in the oceans. Oxygen and sunlight availability are key factors promoting microbial diversity throughout the water column. Ocean currents also play a major role in the physicochemical stratification, carrying oxygen down to deeper zones as well as moving deeper water masses up towards shallower depths. Water samples within a 50-km radius in a pockmark location of the southwestern Atlantic Ocean were collected and the prokaryotic communities from different water depths - chlorophyll maximum, oxygen minimum and deep-sea bottom (down to 1355 m) - were described. At phylum level, Proteobacteria were the most frequent in all water depths, Cyanobacteria were statistically more frequent in chlorophyll maximum zone, while Thaumarchaeota were significantly more abundant in both oxygen minimum and bottom waters. The most frequent microorganism in the chlorophyll maximum and oxygen minimum zones was a Pelagibacteraceae operational taxonomic unit (OTU). At the bottom, the most abundant genus was the archaeon Nitrosopurnilus. Beta diversity analysis of the 16S rRNA gene sequencing data uncovered in this study shows high spatial hetero-geneity among water zones communities. Our data brings important contribution for the characterisation of oceanic microbial diversity, as it consists of the first description of prokaryotic communities occurring in different oceanic water zones in the southwestern Atlantic Ocean.

Subject headings

NATURVETENSKAP  -- Biologi (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences (hsv//eng)

Keyword

Epipelagic
Mesopelagic
Bathypelagic
Metabarcoding
16S rRNA
Vertical stratification
Pockmark
Akvatisk ekologi
Aquatic Ecology

Publication and Content Type

ref (subject category)
art (subject category)

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