Rock Surface Fungi in Deep Continental Biosphere-Exploration of Microbial Community Formation with Subsurface In Situ Biofilm Trap.

作者: Maija Nuppunen-Puputti , Riikka Kietäväinen , Lotta Purkamo , Pauliina Rajala , Merja Itävaara

DOI: 10.3390/MICROORGANISMS9010064

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摘要: Fungi have an important role in nutrient cycling most ecosystems on Earth, yet their ecology and functionality deep continental subsurface remain unknown. Here, we report the first observations of active fungal colonization mica schist biosphere ability fungi to attach rock surfaces under situ conditions groundwater at 500 967 m depth Precambrian bedrock. We present biofilm trap, designed reveal sessile microbial communities surface groundwater, using Outokumpu Deep Drill Hole, eastern Finland, as a test site. The observed phyla were Basidiomycota, Ascomycota, Mortierellomycota. In addition, significant proportion community represented unclassified Fungi. Sessile differed from planktic communities. main bacterial Firmicutes, Proteobacteria, Actinobacteriota. Biofilm formation is slow process our results indicate that dominate early attachment process, when pristine mineral are exposed ecosystems. Various showed statistically cross-kingdom correlation with both thiosulfate sulfate reducing bacteria, e.g., SRB2 Debaryomyces hansenii.

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