Candidatus Desulforudis audaxviator dominates a 975 m deep groundwater community in central Sweden.

Autor: Westmeijer G; Centre for Ecology and Evolution in Microbial model Systems (EEMiS), Linnaeus University, Stuvaregatan 4, Kalmar, Sweden. george.westmeijer@umu.se.; Department of Chemistry, Umeå University, Umeå, Sweden. george.westmeijer@umu.se., van Dam F; Department of Biology and Environmental Sciences, Linnaeus University, Stuvaregatan 4, Kalmar, Sweden., Kietäväinen R; Geological Survey of Finland, Espoo, Finland.; Department of Geosciences and Geography, University of Helsinki, Helsinki, Finland., González-Rosales C; Centre for Ecology and Evolution in Microbial model Systems (EEMiS), Linnaeus University, Stuvaregatan 4, Kalmar, Sweden., Bertilsson S; Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden., Drake H; Department of Biology and Environmental Sciences, Linnaeus University, Stuvaregatan 4, Kalmar, Sweden., Dopson M; Centre for Ecology and Evolution in Microbial model Systems (EEMiS), Linnaeus University, Stuvaregatan 4, Kalmar, Sweden.
Jazyk: angličtina
Zdroj: Communications biology [Commun Biol] 2024 Oct 15; Vol. 7 (1), pp. 1332. Date of Electronic Publication: 2024 Oct 15.
DOI: 10.1038/s42003-024-07027-2
Abstrakt: The continental bedrock contains groundwater-bearing fractures that are home to microbial populations that are vital in mediating the Earth's biogeochemical cycles. However, their diversity is poorly understood due to the difficulty of obtaining samples from this environment. Here, a groundwater-bearing fracture at 975 m depth was isolated by employing packers in order to characterize the microbial community via metagenomes combined with prokaryotic and eukaryotic marker genes (16S and 18S ribosomal RNA gene). Genome-resolved analyses revealed a community dominated by sulfate-reducing Bacillota, predominantly represented by Candidatus Desulforudis audaxviator and with Wood-Ljungdahl as the most prevalent pathway for inorganic carbon fixation. Moreover, the eukaryotic community had a considerable diversity and was comprised of mainly flatworms, chlorophytes, crustaceans, ochrophytes, and fungi. These findings support the important role of the Bacillota, with the sulfate reducer Candidatus Desulforudis audaxviator as its main representative, as primary producers in the often energy-limited groundwaters of the continental subsurface.
(© 2024. The Author(s).)
Databáze: MEDLINE
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