Frank Hagedorn

soil ecologist, biogeochemist
Dr. sc. nat. ETH
coordinator carbon research WSL

main activity

• Carbon cycling under elevated atmospheric CO2
• Transport and transformation of nitrogen in forest soils and catchments
• Stable isotopes 13C and 15N
• Turnover and stability of soil organic matter
• Controls on dissolved organic carbon and nitrogen

projects

• Soils, a sink for atmospheric CO2? Stability of soil-incorporated 13CO2
• Cycling of dissolved organic carbon in a mature forest under elevated CO2
• Dynamics of soil carbon and nutrients under elevated CO2 in treeline ecotones
• Early response areas for climate change in Eurasia - Spatio-temporal dynamics of upper tree-line in the Ural mountains and its impact on for carbon sequestration
• Fire-derived carbon in Southern Switzerland
• Soil and vegetation dynamics in savanna landscapes and Miombo woodlands of Tanzania

publications

• Hagedorn, F., Spinnler, D., Bundt, M., Blaser, P., Siegwolf R. (2003): The input and fate of new C in two forest soils under elevated CO2. Global Change Biology 9, 862-872.
• Hagedorn, F., Spinnler, D., Siegwolf R. (2003): Increased N deposition retards mineralization of old soil organic matter. Soil Biology & Biochemistry 35, 1683-1692.
• Hagedorn, F., Landolt, W., Tarjan, D., Egli, P. & Bucher, J.B. (2002): Elevated CO2 influences nutrient availability in young beech-spruce communities on two soils. Oecologia 132, 109-117.
• Hagedorn, F. & Bundt, M. (2002): The Age of Preferential Flow Paths. Geoderma 108, 119-132.
• Hagedorn, F., Blaser, P., Siegwolf, R. (2002): Elevated atmospheric CO2 and increased N deposition effects on dissolved organic carbon - clues from d13C signature. Soil Biology and Biochemistry 34: 355-366.
• Hagedorn, F. Maurer, S., Egli, P., Blaser, P., Bucher, J.B., Siegwolf, R. (2001): Carbon sequestration in forest soils - effects of soil type, atmospheric CO2 enrichment, and N deposition. European Journal of Soil Science 52: 619-628.
• Hagedorn, F., Schleppi, P., Mohn, J., Bucher, J.B., Flühler, H. (2001): Retention and leaching of elevated N deposition in a forest ecosystem with Gleysols. Water, Air & Soil Pollution 129: 119-142.
• Hagedorn, F., Bucher, J. B., Schleppi, P. (2001): Contrasting dynamics of dissolved inorganic and organic nitrogen in soil and surface waters of forested catchments with Gleysols. Geoderma 100: 173-192.
• Bundt M., Zimmermann S., Blaser P., Hagedorn F. (2001): Sorption and transport of metals in preferential flow paths and soil matrix after the addtition of wood ash. European Journal of Soil Science 52: 423-431.
• Bundt, M., Jäggi, M., Blaser, P., Siegwolf R., Hagedorn, F. (2001): Carbon and nitrogen dynamics in preferential flow paths and matrix of a forest. Soil Soil Science Society America Journal 65: 1529-1538.
• Hagedorn, F., Bucher, J.B., Tarjan, D., Rusert, P., Bucher-Wallin, I. (2000): Responses of N fluxes and pools to elevated atmospheric CO2 in model forest ecosystems with acidic and calcareous soils Plant and Soil 224: 273-286.
• Hagedorn, F., Schleppi, P., Waldner, P., Flühler, H. (2000): Export of dissolved organic carbon and nitrogen from Gleysol dominated catchments - the significance of water flow paths. Biogeochemistry 50: 137-161.
• Hagedorn, F., Kaiser, K., Feyen, H., Schleppi, P. (2000): Effects of redox conditions and flow processes on the mobility of dissolved organic carbon and nitrogen in a forest soil. Journal of Environmental Quality 29: 288-297.
• Hagedorn, F. Schleppi, P. (2000): Determination of total dissolved nitrogen by persulfate oxidation. Journal of Plant Nutrition and Soil Science 163: 81-82.
• Mohn, J., Schürmann, A., Hagedorn, F., Schleppi, P., Bachofen R. (2000): Increased rates of denitrification in nitrogen-treated forest soils. Forest Ecology and Management 137: 113-119.
• Hagedorn, F., Mohn J., Schleppi P., and Flühler H. (1999): The role of rapid flow paths for nitrogen transformation in a forest soil - a field study with micro suction cups. Soil Science Society of America Journal 63: 1915-1923.
• Hagedorn, F., Steiner K.G., Sekayange L., Zech W. (1997): Effect of rainfall pattern on nitrogen mineralization and leaching in a green manure experiment in South Rwanda. Plant and Soil 195: 365-375.
• Drechsel, P., Mutwewingabo B., Hagedorn F. (1996): Effect of modifications of the P-Bray no.1 method on soil test results. Journal of Plant Nutrition and Soil Science 159: 409-410.
• Drechsel, P., Steiner K.G., Hagedorn F. (1996): A review on the potential of improved fallows and green manure in Rwanda. Agroforestry Systems 33: 109-136.

• Hagedorn, F., Saurer, M., Blaser, P. (2003): A 13C tracer experiment to identify the origin of dissolved organic carbon in forested mineral soils. European Journal of Soil Science (in press).

Links

• Carbon research at WSL (in german)
• CO2 enrichment experiment with model forest ecosystems
• NITrogen saturation EXperiments NITREX
• The Swiss Canopy Crane (SCC) Project
• CO2 and N availability in a deciduous forest
• Treeline trees in a CO2 enriched world

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