Martin Potthoff Dr. rer. nat. (PhD) Terrestrial Ecology; Soil Biology Fon: ++49-(0)551-39-6960 Fax: ++49-(0)551-39-2295 mpottho@uni-goettingen.de		Research Centre for Agriculture and the  Environment Georg August University of Göttingen Am Vogelsang 6  D-37075 Göttingen Germany

research items

education

professional experience

12/2006-	Scientific coordinator, Research Centre for Agriculture and the Environment, Göttingen, Germany
03/2005-	Scientific staff, Department of Soil Biology and Plant Nutrition, Kassel (Witzenhausen), Germany Earthworm communities in systems of reduced tillage in organic farming Genetical and ecophysiological variation in populations of Lumbricus terrestris due to geographical isolation and different habitat preferences (DFG PO785/2)
03/2004-03/2005	Research Associate, Institute of Soil Science and Forest Nutrition, Göttingen, Germany Genetical and ecophysiological variation in populations of Lumbricus terrestris due to geographical isolation and different habitat preferences (DFG PO785/2)
08/2002-10/2003	Research Associate (Post Doc), Department of Vegetable Crops, University of California, Davis, USA Ecology of restored perennial grassland (conservation, bio-diversity, and C-retention) Concepts of sustainable vegetable growing in Salinas, CA Indication of functional groups in the microbial communities of California grassland soils
01/1999-06/2002	Research Associate, Institute of Soil Science and Forest Nutrition, Göttingen, Germany Soil biology and chemistry of forest floors after liming to stop further degradation by acid rain, Nordrhein-Westfalen, Germany Quantification of the microbial C and N turnover in soils after incorporation of 13C and 15N labeled plant residues
02/1995-12/1998	Research Assistant, Research Center Agriculture and Environment (ZLU), Göttingen, Germany Soil ecological indicators of sustainable land use in integrated arable farming systems (The Göttingen-Intex-Project) Field applications of stabile isotopes (13C and 15N) Field lectures on soil science and on ecology in agriculture
07/1994-02/1995	Research Assistant, Institute of Agronomy and Plant Breeding, Göttingen, Germany Developing a research plan to investigate the environmental impact of agricultural cultivation techniques Teaching lab classes on soil ecology and soil biological methods

publications and reports (selected)

Metzke, M., Potthoff, M., Quintern, M., Heß, J., and Joergensen, R.G. (in press). Earthworm communities in organic farming systems of reduced tillage. European Journal of Soil Biology, special issue covering the 8^th International Symposium on Earthworm Ecology.

Joergensen, R.G., Fricke, T., Quintern, M., Raubuch, M., Potthoff, M. (submitted) Spatial heterogeneity of aboveground plant biomass and soil microbial biomass at an arable site recently transformed to grassland. Journal of Plant Nutrition and Soil Science.

Potthoff, M.., Asche, N., Stein, B., Muhs, A., and Beese, F. (in press) Earthworm communities in German beech wood forest soils as affected by liming. European Journal of Soil Biology.

Potthoff, M., Jackson, L.E., Steenwerth, K., Drenovsky, R., Scow, K.M., and Joergensen R.G. (2006) Soil microbial community composition as affected by restoration practices in California grassland. Soil Biology & Biochemistry 38: 1851-1860.

Dyckmans, J., Flessa, H., Lipski, A., Potthoff, M., and Beese, F. (2006) Microbial biomass and activity under oxic and anoxic conditions as affected by nitrate additions. Journal of Plant Nutrition and Soil Science 169: 108-115.

Potthoff, M., Dyckmans, J., Flessa, H., Muhs, A., Beese, F., and Joergensen, R.G. (2005) Dynamics of maize (Zea mays L.) leaf straw mineralization as affected by the presence of soil and the availability of nitrogen. Soil Biology & Biochemistry 37: 1259-1266.

Joergensen, R.G. and Potthoff, M. (2005) Microbial performance after long-term permanent mixing of a grassland soil. Soil Biology & Biochemistry 37: 1249-1258.

Potthoff, M., Jackson, L.E., Ramirez, I., Steenwerth, K., and Rolston, D. (2005) Biological and chemical properties of soil profiles in restored perennial grassland in California. Restoration Ecology 13/1: 61-73.

John, B., Ludwig, B., Potthoff, M., and Flessa, H. (2004) Carbon and nitrogen dynamics after maize harvest: a microcosm study using ¹³C natural abundance. Journal of Plant Nutrition and Soil Science 167: 270-276.

Potthoff, M., Loftfield, N., Buegger, F., Wick, B., John, B., Joergensen, R.G., and Flessa, H. (2003) The determination of d¹³C in soil microbial biomass using fumigation-extraction. Soil Biology & Biochemistry 35: 947-954.

Flessa, H., Potthoff, M., and Loftfield, N. (2002) Laboratory estimates of CO₂ and N₂O emissions following surface application of grass mulch: importance of indigenous microflora of mulch. Soil Biology & Biochemistry 34: 875-879.

Potthoff, M., Joergensen, R.G., and Wolters, V. (2001) Short-term effects of earthworm activity and straw amendment on the microbial C and N turnover in a remoistened arable soil after summer drought. Soil Biology & Biochemistry 33: 583-591.

Potthoff, M. (1999) Synchronisation des Stoffkreislaufs durch Förderung bodenbiologischer Prozesse im Ackerbau. Dissertation, Universität Göttingen, Cuvillier Verlag Göttingen, ISBN 3-89712-666-4, 240 S.

Potthoff, M. and Loftfield, N. (1998) How to quantify contamination of organic litter bag material with soil? Pedobiologia 42: 147–153.

books and book chapters

Jackson, L.E., Potthoff, M., Steenwerth, K.L., O’Geen, A.T., Stromberg, M.R., and Scow, K.M. (in press) Soil biology and carbon sequestration. Chapter 7. In: "Ecology and Management of California Grasslands", Corbin, J., d’Antonio, C., and  Stromberg, M.R. (eds.). University of California Press, Berkeley, CA.

Potthoff, M. and Beese, F. (2000) Bodenbiologische Regelungsfunktionen in Ackerbausystemen. In: "Ackerbau in der Kulturlandschaft - Funktionen und Leistungen", Gerowitt, B. und Steinmann H.-H. (eds.), 81-108.

Potthoff, M. (1999) Synchronisation des Stoffkreislaufs durch Förderung bodenbiologischer Prozesse im Ackerbau. Dissertation, Universität Göttingen, Cuvillier Verlag Göttingen, ISBN 3-89712-666-4, 240 S.

recent presentations (selected)

Potthoff, M., Jackson, L.E., Sokolow, S., and Joergensen, R.G. (2007) Effects of native Lupinus bicolor on plant and soil microbial communities in a perennial California grassland restored with Nassella pulchra. 92nd Annual Meeting of the Ecological Society of America, San Jose, August 2007 (oral).

Potthoff, M., Jackson, L.E., Sokolow, S., and Joergensen, R.G. (2006) Effects of native Lupinus bicolor on soil microbial properties of a perennial California grassland restored with Nassella pulchra. Meeting of commission III of the German Soil Science Society, Braunschweig, September 2006 (oral).

Richter, K., Potthoff, M., Gailing, O., Beese, F., and Finkeldey, R.,(2006). Diversity and structure among and within populations of Lumbricus terrestris (Lumbricidae) in Europe as detected by Amplified Fragment Length Polymorphism (AFLP). 8^th International Symposium of Earthworm Ecology, Krakow, Poland, September 2006 (oral).

Metzke, M., Potthoff, M., Quintern, M., Heß, J., and Joergensen, R.G. (2006). Earthworm communities in organic farming systems of reduced tillage. 8^th International Symposium of Earthworm Ecology, Krakow, Poland, September 2006 (poster).

Potthoff, M., Steinmann, H.-H., Beese, F., and Joergensen, R.G. (2006) Mineralization of crop residues and the fate of residue-nitrogen as affected by tillage practices and litter quality. 18^th World Congress of Soil Science, Philadelphia, USA, July 2006 (poster).

Potthoff, M., Richter, K., Gailing, O., Finkeldey, R. and Beese, F. (2005) Genetic variability and differences of populations of Lumbricus terrestris in its European distribution. Congress of the German Soil Science Society, Marburg, September 4 to September 11, 2005 (oral).

Dyckmans, J., Potthoff, M., und Beese, F. (2005) Transformation of nitrogen from crop residues: Interactions between lifeform of earthworms and tillage regime. Congress of the German Soil Science Society, Marburg, September 4 to September 11, 2005 (oral).

Potthoff, M. (2005) Decomposition of plant residues in soil - microbial and zoological views on a very important function in soils – Department of Land, Air, and Water Resources, University of California at Davis, April 12, 2005, Davis, CA (invited talk).

Potthoff, M. and Joergensen, R.G. (2005) Determination of d¹³C in soil microbial biomass C - Methods and Applications – Department of Earth Systems Science, University of California at Irvine, April 19, 2005, Irvine, CA (invited talk).

Potthoff, M. and Beese, F. (2004) Soil biota: Global change and the function of forest soils as a habitat for soil organisms. International Symposium "Forest soils under global and local changes: from research to practice", Bordeaux, France, September 15-18, 2004 (oral, keynote).

Potthoff, M. (2004) Steuerung des Abbaus von Pflanzenresten im Boden -mikrobiologische und zoologische Aspekte einer wichtigen Bodenfunktion- Research centre Jülich, Institute of Chemistry und Dynamic of the Geosphere (ICG), Agrosphere (ICG IV) January 19, 2004 (invited talk).

professional memberships

• Member of the Gesellschaft für Ökologie (GfÖ)
• Member of the German Society of Soil Science
• Funding member of the Göttingen Soil Initiative (GBI)
• Funding member of the Center on Sustainable Development at the University Göttingen

• Full CV
• Full list of publications