I am interested in the research fields of Aquatic Biogeochemistry, Stable Isotope Biogeochemistry, organic geochemistry, microbial ecology and (paleo-)limnology.

• Since Aug. 2017: Board of directors (Departementsleitung), Department of Environmental Science, University of Basel (since Aug. 2019 Head of Department)
• Since 2017: Full Professor, Department for Environmental Science, University of Basel
• 2018: Cox Visiting Professor, Department of Earth Systems Science, Stanford University
• 2014-2017: Dean of Research at the Faculty of Science at the University of Basel
• 2010-2016: Associate Professor, Department for Environmental Science, University of Basel
• 2007-2010: Assistant Professor (tenure-track), Department for Environmental Science, University of Basel
• 2004-2007: Assistant Professor (tenure-track), Department of Earth and Atmospheric Science, Université de Québec à Montréal, Center for Research in Geochemistry and Geodynamics (GEOTOP-UQAMMcGill), Montréal, Canada.
• 2003 - 2004: Postdoctoral Research Associate, Department of Geosciences, Princeton University, Princeton, USA.
• 2002: Ph.D. in Environmental Geochemistry/Stable Isotope Geochemistry, Department of Earth Sciences, Swiss Federal Institute of Technology (ETH) Zürich, Switzerland.

Frey, C., Xi. Sun, L. Szemberski, K. L. Casciotti, E. Garcia-Robledo, A. Jayakumar, C.L. Kelly, M.F. Lehmann, and Bess B. Ward (2022). Nitrous oxide production kinetics from ammonia oxidation in the Eastern Tropical North Pacific. Accepted to Limnology and Oceanography

Bartosiewicz, M., J. Venetz, S. Läubli, O. Sepúlveda-Steiner, D. Bouffard, J. Zopfi and M. F. Lehmann (2022). Detritus-hosted methanogenesis sustains the methane paradox in oxic lake waters. Limnology and Oceanography; https://doi.org/10.1002/lno.12263

Visser, A.-N., S.D. Wankel, C. Frey, A. Kappler and M.F. Lehmann (2022). Unchanged nitrate and nitrite isotope fractionation during heterotrophic and Fe(II)-mixotrophic denitrification suggest a non-enzymatic link between denitrification and Fe(II) oxidation.  Front. Microbiol. 13:927475. doi: 10.3389/fmicb.2022.927475

Hausherr, D.,  R. Niederdorfer, H.Bürgmann, M.F. Lehmann, P. Magyar, J. Mohn, E. Morgenroth, A. Joss (2022). Successful year-round mainstream partial nitritation anammox: assessment of effluent quality, performance and N₂O emissions. Water Research X, Vol. 16, https://doi.org/10.1016/j.wroa.2022.100145

Rushworth, D.D., I. Christl, N. Kumar, K. Hoffman, R. Kretzschmar, M. F. Lehmann, W. D. C. Schenkeveld, S. M. Kraemer (2022). Copper mobilisation from Cu sulfide minerals by methanobactin: Effect of pH, oxygen and natural organic matter. Geobiology 2022;20:690–706;  https://doi.org/10.1111/gbi.12505   

Tischer, J. , J. Zopfi, C. Frey, P. M. Magyar, A. Brand, K. Oswald, C. Jegge, C.H. Frame, M. R. Miracle, X. Sòria-Perpinyà, E. Vicente and M.F. Lehmann (2022). Isotopic signatures of biotic and abiotic N₂O production and consumption in the water column of meromictic, ferruginous Lake La Cruz (Spain). Limnology and Oceanography; Vol. 67, 1760-1775; https://doi.org/10.1002/lno.12165

Su, G., J. Zopfi, H. Niemann, M. F. Lehmann (2022). Multiple groups of methanotrophic bacteria mediate methane oxidation in anoxic lake sediments. Frontiers in Microbiology – Aquatic Microbiology; https://doi.org/10.3389/fmicb.2022.864630