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Microbial diversity from chlorophyll maximum, oxygen minimum and bottom zones in the southwestern Atlantic Ocean
Pontificia Univ Catolica Rio Grande do Sul, Brazil.
Pontificia Univ Catolica Rio Grande do Sul, Brazil.
Univ Fed Rio Grande do Sul, Brazil.ORCID iD: 0000-0003-3226-8047
Pontificia Univ Catolica Rio Grande do Sul, Brazil.
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2018 (English)In: Journal of Marine Systems, ISSN 0924-7963, E-ISSN 1879-1573, Vol. 178, p. 52-61Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 178, p. 52-61
Keywords [en]
Epipelagic, Mesopelagic, Bathypelagic, Metabarcoding, 16S rRNA, Vertical stratification, Pockmark
National Category
Biological Sciences
Research subject
Ecology, Aquatic Ecology
Identifiers
URN: urn:nbn:se:lnu:diva-71131DOI: 10.1016/j.jmarsys.2017.10.008ISI: 000418215000005OAI: oai:DiVA.org:lnu-71131DiVA, id: diva2:1186440
Available from: 2018-02-28 Created: 2018-02-28 Last updated: 2018-02-28Bibliographically approved

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Ketzer, João Marcelo

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Pivel, Maria A. G.Eizirik, EduardoUtz, Laura R. P.Ketzer, João Marcelo
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