1. Microbial Community Structure in a Serpentine-Hosted Abiotic Gas Seepage at the Chimaera Ophiolite, Turkey.
- Author
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Neubeck A, Sun L, Müller B, Ivarsson M, Hosgörmez H, Özcan D, Broman C, and Schnürer A
- Subjects
- Archaea classification, Archaea genetics, Archaea metabolism, Bacteria classification, Bacteria genetics, Bacteria metabolism, Fresh Water chemistry, Hydrogen metabolism, Metals metabolism, Methane metabolism, Phylogeny, Turkey, Archaea isolation & purification, Bacteria isolation & purification, Biodiversity, Fresh Water microbiology, Geologic Sediments microbiology
- Abstract
The surface waters at the ultramafic ophiolitic outcrop in Chimaera, Turkey, are characterized by high pH values and high metal levels due to the percolation of fluids through areas of active serpentinization. We describe the influence of the liquid chemistry, mineralogy, and H
2 and CH4 levels on the bacterial community structure in a semidry, exposed, ultramafic environment. The bacterial and archaeal community structures were monitored using Illumina sequencing targeting the 16S rRNA gene. At all sampling points, four phyla, Proteobacteria , Actinobacteria , Chloroflexi , and Acidobacteria , accounted for the majority of taxa. Members of the Chloroflexi phylum dominated low-diversity sites, whereas Proteobacteria dominated high-diversity sites. Methane, nitrogen, iron, and hydrogen oxidizers were detected as well as archaea and metal-resistant bacteria. IMPORTANCE Our study is a comprehensive microbial investigation of the Chimaera ophiolite. DNA has been extracted from 16 sites in the area and has been studied from microbial and geochemical points of view. We describe a microbial community structure that is dependent on terrestrial, serpentinization-driven abiotic H2 , which is poorly studied due to the rarity of these environments on Earth., (Copyright © 2017 Neubeck et al.)- Published
- 2017
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