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Anaerobic consortia of fungi and sulfate reducing bacteria in deep granite fractures
Swedish Museum of Natural History, Department of Paleobiology.
Swedish Museum of Natural History, Department of Paleobiology.ORCID iD: 0000-0003-0206-579
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2017 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 8, no 55, 1-9 p.Article in journal (Refereed) Published
Abstract [en]

The deep biosphere is one of the least understood ecosystems on Earth. Although most microbiological studies in this system have focused on prokaryotes and neglected microeukaryotes, recent discoveries have revealed existence of fossil and active fungi in marine sediments and sub-seafloor basalts, with proposed importance for the subsurface energy cycle. However, studies of fungi in deep continental crystalline rocks are surprisingly few. Consequently, the characteristics and processes of fungi and fungus-prokaryote interactions in this vast environment remain enigmatic. Here we report the first findings of partly organically preserved and partly mineralized fungi at great depth in fractured crystalline rock (-740 m). Based on environmental parameters and mineralogy the fungi are interpreted as anaerobic. Synchrotron-based techniques and stable isotope microanalysis confirm a coupling between the fungi and sulfate reducing bacteria. The cryptoendolithic fungi have significantly weathered neighboring zeolite crystals and thus have implications for storage of toxic wastes using zeolite barriers.

Place, publisher, year, edition, pages
2017. Vol. 8, no 55, 1-9 p.
Keyword [en]
Fungi, weathering, zeolite, anaerobes, deep biosphere, waste storage
National Category
Geology Microbiology
Research subject
The changing Earth
Identifiers
URN: urn:nbn:se:nrm:diva-2423DOI: 10.1038/s41467-017-00094-6OAI: oai:DiVA.org:nrm-2423DiVA: diva2:1120129
Funder
Danish National Research Foundation, DNRF53Paul Scherrer Institut, PSI, 20160140Swedish Research Council, 2012-4364, 2013-4290
Available from: 2017-07-05 Created: 2017-07-05 Last updated: 2017-07-07Bibliographically approved

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Ivarsson, MagnusBengtson, StefanWhitehouse, MartinBelivanova, Veneta
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