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Biogenic Mn-oxides in subseafloor basalts
Swedish Museum of Natural History, Department of Paleobiology.
Department of Geological Sciences, Stockholm University, Stockholm, Sweden.
Department of Biomedical Engineering (MTÖ), County Council of Östergötland, Radiation Physics, Department of Medicine and Health Sciences, Linköping University, Linköping, Sweden.
Department of Geological Sciences, Stockholm University, Stockholm, Sweden.
2015 (English)In: PLOS ONE, E-ISSN 1932-6203, Vol. 10, no 6, article id e0128863Article in journal (Refereed) Published
Abstract [en]

The deep biosphere of the subseafloor basalts is recognized as a major scientific frontier in disciplines like biology, geology, and oceanography. Recently, the presence of fungi in these environments has involved a change of view regarding diversity and ecology. Here, we describe fossilized fungal communities in vugs in subseafloor basalts from a depth of 936.65 metres below seafloor at the Detroit Seamount, Pacific Ocean. These fungal communities are closely associated with botryoidal Mn oxides composed of todorokite. Analyses of the Mn oxides by Electron Paramagnetic Resonance spectroscopy (EPR) indicate a biogenic signature. We suggest, based on mineralogical, morphological and EPR data, a biological origin of the botryoidal Mn oxides. Our results show that fungi are involved in Mn cycling at great depths in the seafloor and we introduce EPR as a means to easily identify biogenic Mn oxides in these environments.

Place, publisher, year, edition, pages
2015. Vol. 10, no 6, article id e0128863
National Category
Geology Other Earth and Related Environmental Sciences
Research subject
The changing Earth
Identifiers
URN: urn:nbn:se:nrm:diva-1457DOI: 10.1371/journal.pone.0128863OAI: oai:DiVA.org:nrm-1457DiVA, id: diva2:876061
Funder
Swedish Research Council, 2012-4364Available from: 2015-12-02 Created: 2015-12-02 Last updated: 2023-01-10Bibliographically approved

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