Diversity of Rare and Abundant Prokaryotic Phylotypes in the Prony Hydrothermal Field and Comparison with Other Serpentinite-Hosted Ecosystems

Frontiers in Microbiology
Eléonore FrouinGaël Erauso

Abstract

The Bay of Prony, South of New Caledonia, represents a unique serpentinite-hosted hydrothermal field due to its coastal situation. It harbors both submarine and intertidal active sites, discharging hydrogen- and methane-rich alkaline fluids of low salinity and mild temperature through porous carbonate edifices. In this study, we have extensively investigated the bacterial and archaeal communities inhabiting the hydrothermal chimneys from one intertidal and three submarine sites by 16S rRNA gene amplicon sequencing. We show that the bacterial community of the intertidal site is clearly distinct from that of the submarine sites with species distribution patterns driven by only a few abundant populations, affiliated to theChloroflexiandProteobacteriaphyla. In contrast, the distribution of archaeal taxa seems less site-dependent, as exemplified by the co-occurrence, in both submarine and intertidal sites, of two dominant phylotypes ofMethanosarcinalespreviously thought to be restricted to serpentinizing systems, either marine (Lost City Hydrothermal Field) or terrestrial (The Cedars ultrabasic springs). Over 70% of the phylotypes were rare and included, among others, all those affiliated to candidate divisions. We finally compared ...Continue Reading

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Datasets Mentioned

BETA
PRJEB21795
AB476673.1

Methods Mentioned

BETA
PCR
single cell sequencing

Software Mentioned

QIIME
Anvi
PyNAST
UCLUST
BLASTn ( Basic Local Alignment Search Tool
UCHIME
MAFFT
R package phyloseq
SeaView

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