Genomic ecology of Marine Group II, the most common marine planktonic Archaea across the surface ocean

Type Article
Date 2019-09
Language English
Author(s) Pereira Olivier1, Hochart Corentin2, Auguet Jean-Christophe3, Debroas Didier2, Galand Pierre E.1
Affiliation(s) 1 : Sorbonne Université, CNRS, Laboratoire d'Ecogéochimie des Environnements Benthiques (LECOB), Observatoire Océanologique de Banyuls, Banyuls sur Mer, France
2 : Laboratoire Microorganismes: Génome et Environnement, UMR 6023 CNRS – Université Blaise Pascal Aubière France
3 : Marine Biodiversity, Exploitation and Conservation (MARBEC) Université de Montpellier, CNRS, IFREMER Montpellier France
Source Microbiologyopen (2045-8827) (Wiley), 2019-09 , Vol. 8 , N. 9 , P. e00852 (15p.)
DOI 10.1002/mbo3.852
WOS© Times Cited 23
Keyword(s) 16S rRNA, Euryarchaeota, global ocean, metagenomics, poseidoniales, proteorhodopsin

Planktonic Archaea have been detected in all the world's oceans and are found from surface waters to the deep sea. The two most common Archaea phyla are Thaumarchaeota and Euryarchaeota. Euryarchaeota are generally more common in surface waters, but very little is known about their ecology and their potential metabolisms. In this study, we explore the genomic ecology of the Marine Group II (MGII), the main marine planktonic Euryarchaeota, and test if it is composed of different ecologically relevant units. We re‐analyzed Tara Oceans metagenomes from the photic layer and the deep ocean by annotating sequences against a custom MGII database and by mapping gene co‐occurrences. Our data provide a global view of the distribution of Euryarchaeota, and more specifically of MGII subgroups, and reveal their association to a number of gene‐coding sequences. In particular, we show that MGII proteorhodopsins were detected in both the surface and the deep chlorophyll maximum layer and that different clusters of these light harvesting proteins were present. Our approach helped describing the set of genes found together with specific MGII subgroups. We could thus define genomic environments that could theoretically describe ecologically meaningful units and the ecological niche that they occupy.

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Publisher's official version 15 1 MB Open access
AppendixFig1 3 51 KB Open access
AppendixFig2 1 515 KB Open access
AppendixFig3 1 136 KB Open access
AppendixFig4 7 1 MB Open access
AppendixFig5 4 440 KB Open access
AppendixFig6 1 46 KB Open access
AppendixFig7 2 223 KB Open access
AppendixFig8 1 269 KB Open access
AppendixFig9 1 873 KB Open access
AppendixFig10 1 376 KB Open access
Table S1-S6 752 KB Open access
File s1 7 MB Open access
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How to cite 

Pereira Olivier, Hochart Corentin, Auguet Jean-Christophe, Debroas Didier, Galand Pierre E. (2019). Genomic ecology of Marine Group II, the most common marine planktonic Archaea across the surface ocean. Microbiologyopen, 8(9), e00852 (15p.). Publisher's official version : , Open Access version :