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    A coupled microscopy approach to assess the nano-landscape of weathering

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    s41598-019-41357-0.pdf
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    Description:
    Final Published Version
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    Author
    Lybrand, Rebecca A
    Austin, Jason C
    Fedenko, Jennifer
    Gallery, Rachel E
    Rooney, Erin
    Schroeder, Paul A
    Zaharescu, Dragos G
    Qafoku, Odeta
    Affiliation
    Univ Arizona, Sch Nat Resources & Environm
    Univ Arizona, Dept Ecol & Evolutionary Biol
    Issue Date
    2019-03-29
    
    Metadata
    Show full item record
    Publisher
    NATURE PUBLISHING GROUP
    Citation
    Lybrand, R. A., Austin, J. C., Fedenko, J., Gallery, R. E., Rooney, E., Schroeder, P. A., ... & Qafoku, O. (2019). A coupled microscopy approach to assess the nano-landscape of weathering. Scientific reports, 9(1), 5377.
    Journal
    SCIENTIFIC REPORTS
    Rights
    © The Author(s) 2019. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Te images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Mineral weathering is a balanced interplay among physical, chemical, and biological processes. Fundamental knowledge gaps exist in characterizing the biogeochemical mechanisms that transform microbe-mineral interfaces at submicron scales, particularly in complex field systems. Our objective was to develop methods targeting the nanoscale by using high-resolution microscopy to assess biological and geochemical drivers of weathering in natural settings. Basalt, granite, and quartz (53-250 mu m) were deployed in surface soils (10 cm) of three ecosystems (semiarid, subhumid, humid) for one year. We successfully developed a reference grid method to analyze individual grains using: (1) helium ion microscopy to capture micron to sub-nanometer imagery of mineral-organic interactions; and (2) scanning electron microscopy to quantify elemental distribution on the same surfaces via element mapping and point analyses. We detected locations of biomechanical weathering, secondary mineral precipitation, biofilm formation, and grain coatings across the three contrasting climates. To our knowledge, this is the first time these coupled microscopy techniques were applied in the earth and ecosystem sciences to assess microbe-mineral interfaces and in situ biological contributors to incipient weathering.
    Note
    Open access journal
    ISSN
    2045-2322
    PubMed ID
    30926847
    DOI
    10.1038/s41598-019-41357-0
    Version
    Final published version
    Sponsors
    Oregon State University faculty startup fund; Office of Biological and Environmental Research; NSF [EAR-GEO-1331846, EAR-0724958, IOS-1354219]; [EAR-1023215]
    ae974a485f413a2113503eed53cd6c53
    10.1038/s41598-019-41357-0
    Scopus Count
    Collections
    UA Faculty Publications

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