HelfensteinTamburiniSperberEtAl2018

Référence

Helfenstein, J., Tamburini, F., von Sperber, C., Massey, M.S., Pistocchi, C., Chadwick, O.A., Vitousek, P.M., Kretzschmar, R., Frossard, E. (2018) Combining spectroscopic and isotopic techniques gives a dynamic view of phosphorus cycling in soil. Nature Communications, 9(1). (Scopus )

Résumé

Current understanding of phosphorus (P) cycling in soils can be enhanced by integrating previously discrete findings concerning P speciation, exchange kinetics, and the underlying biological and geochemical processes. Here, we combine sequential extraction with P K-edge X-ray absorption spectroscopy and isotopic methods ( 33 P and 18 O in phosphate) to characterize P cycling on a climatic gradient in Hawaii. We link P pools to P species and estimate the turnover times for commonly considered P pools. Dissolved P turned over in seconds, resin-extractable P in minutes, NaOH-extractable inorganic P in weeks to months, and HCl-extractable P in years to millennia. Furthermore, we show that in arid-zone soils, some primary mineral P remains even after 150 ky of soil development, whereas in humid-zone soils of the same age, all P in all pools has been biologically cycled. The integrative information we provide makes possible a more dynamic, process-oriented conceptual model of P cycling in soils. © 2018, The Author(s).

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@ARTICLE { HelfensteinTamburiniSperberEtAl2018,
    AUTHOR = { Helfenstein, J. and Tamburini, F. and von Sperber, C. and Massey, M.S. and Pistocchi, C. and Chadwick, O.A. and Vitousek, P.M. and Kretzschmar, R. and Frossard, E. },
    TITLE = { Combining spectroscopic and isotopic techniques gives a dynamic view of phosphorus cycling in soil },
    JOURNAL = { Nature Communications },
    YEAR = { 2018 },
    VOLUME = { 9 },
    NUMBER = { 1 },
    NOTE = { cited By 11 },
    ABSTRACT = { Current understanding of phosphorus (P) cycling in soils can be enhanced by integrating previously discrete findings concerning P speciation, exchange kinetics, and the underlying biological and geochemical processes. Here, we combine sequential extraction with P K-edge X-ray absorption spectroscopy and isotopic methods ( 33 P and 18 O in phosphate) to characterize P cycling on a climatic gradient in Hawaii. We link P pools to P species and estimate the turnover times for commonly considered P pools. Dissolved P turned over in seconds, resin-extractable P in minutes, NaOH-extractable inorganic P in weeks to months, and HCl-extractable P in years to millennia. Furthermore, we show that in arid-zone soils, some primary mineral P remains even after 150 ky of soil development, whereas in humid-zone soils of the same age, all P in all pools has been biologically cycled. The integrative information we provide makes possible a more dynamic, process-oriented conceptual model of P cycling in soils. © 2018, The Author(s). },
    AFFILIATION = { Institute of Agricultural Sciences, ETH Zurich, Lindau, 8315, Switzerland; Institute of Crop Science and Resource Conservation, University of Bonn, Bonn, 53115, Germany; McGill University, Montreal, QC H3A 0B9, Canada; Department of Earth and Environmental Sciences, California State University East Bay, Hayward, CA 94542, United States; Eco&Sols, Montpellier SupAgro, University of Montpellier, CIRAD, INRA, IRD, Montpellier, 34060, France; Department of Geography, University of California, Santa Barbara, CA 93106, United States; Department of Biology, Stanford University, Stanford, CA 94305, United States; Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, Zürich, 8092, Switzerland },
    ART_NUMBER = { 3226 },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1038/s41467-018-05731-2 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85051663673&doi=10.1038%2fs41467-018-05731-2&partnerID=40&md5=2fc9351195eb4c7670f3c48f4d36044b },
}

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