Biofilm Formation on Excavation Damaged Zone Fractures in Deep Neogene Sedimentary Rock.
Aerobic Methanotrophs
Biofilm Formation
Dark O2
Excavation Damaged Zone
Radioactive Waste Disposal
Journal
Microbial ecology
ISSN: 1432-184X
Titre abrégé: Microb Ecol
Pays: United States
ID NLM: 7500663
Informations de publication
Date de publication:
22 Oct 2024
22 Oct 2024
Historique:
received:
08
05
2024
accepted:
14
10
2024
medline:
22
10
2024
pubmed:
22
10
2024
entrez:
22
10
2024
Statut:
epublish
Résumé
Deep underground galleries are used to access the deep biosphere in addition to mining and other engineering applications, such as geological disposal of radioactive waste. Fracture networks developed in the excavation damaged zone (EDZ) are concerned with accelerating mass transport, where microbial colonization might be possible due to the availability of space and nutrients. In this study, microbial biofilms at EDZ fractures were investigated by drilling from a 350-m-deep gallery and subsequent borehole logging at the Horonobe Underground Research Laboratory (URL). By using microscopic and spectroscopic techniques, the dense colonization of microbial cells was demonstrated at the surfaces of the EDZ fractures with high hydraulic conductivity. 16S rRNA gene sequence analysis revealed the dominance of gammaproteobacterial lineages, the cultivated members of which are aerobic methanotrophs. The near-complete genomes from Horonobe groundwater, affiliated with the methanotrophic lineages, were fully equipped with genes involved in aerobic methanotrophy. Although the mediation of aerobic methanotrophy remains to be demonstrated, microbial O
Identifiants
pubmed: 39436423
doi: 10.1007/s00248-024-02451-7
pii: 10.1007/s00248-024-02451-7
doi:
Substances chimiques
RNA, Ribosomal, 16S
0
DNA, Bacterial
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
132Informations de copyright
© 2024. The Author(s).
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