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

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

Research output: Contribution to journalArticle

115 Citations (Scopus)

Abstract

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 multidisciplinary 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 matter 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
Volume10
Issue number3
DOIs
Publication statusPublished - 2011

Keywords

  • damma

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