Chemical and Biological Gradients along the Damma Glacier Soil Chronosequence, Switzerland

Stefano M. Bernasconi, Andreas Bauder, Bernard Bourdon, Ivano Brunner, Else Buenemann, Iso Christl, Nicolas Derungs, Peter Edwards, Daniel Farinotti, Beat Frey, Emmanuel Frossard, Gerhard Furrer, Merle Gierga, Hans Goeransson, Kathy Guelland, Frank Hagedorn, Irka Hajdas, Ruth Hindshaw, Susan Ivy-Ochs, Jan JansaTobias Jonas, Mirjam Kiczka, Ruben Kretzschmar, Emmanuel Lemarchand, Joerg Luster, Jan Magnusson, Edward A. D. Mitchell, Harry Olde Venterink, Michael Ploetze, Ben Reynolds, Rienk H. Smittenberg, Manfred Staehli, Federica Tamburini, Edward T. Tipper, Lukas Wacker, Monika Welc, Jan G. Wiederhold, Josef Zeyer, Stefan Zimmermann, Anita Zumsteg

    Research output: Contribution to journalArticlepeer-review

    120 Citations (Scopus)


    Soils are the product of a complex suite of chemical, biological, and physical processes. In spite of the importance of soils for society and for sustaining life on earth, our knowledge of soil formation rates and of the influence of biological activity on mineral weathering and geochemical cycles is still limited. In this paper we provide a description of the Damma Glacier Critical Zone Observatory and present a first synthesis of our multi disciplinary studies of the 150-yr soil chronosequence. The aim of our research was to improve our understanding of ecosystem development on a barren substrate and the early evolution of soils and to evaluate the influence of biological activity on weathering rates. Soil pH, cation exchange capacity, biomass, bacterial and fungal populations, and soil organic matt er show clear gradients related to soil age, in spite of the extreme heterogeneity of the ecosystem. The bulk mineralogy and inorganic geochemistry of the soils, in contrast, are independent of soil age and only in older soils (>100 yr) is incipient weathering observed, mainly as a decreasing content in albite and biotite by coincidental formation of secondary chlorites in the clay fraction. Further, we document the rapid evolution of microbial and plant communities along the chronosequence.

    Original languageEnglish
    Pages (from-to)867-883
    Number of pages17
    JournalVadose Zone Journal
    Issue number3
    Publication statusPublished - Aug 2011


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