Research Group Prof. M. Lehmann

Teaching and research activities of our group deal with biogeochemical processes and their isotope-geochemical signatures in aquatic systems and sedimentary environments. We are particularly interested in the biological cycling/transformation of nitrogenous compounds (and their isotopologues), methane, and organic matter in terrestrial aquatic environments and the ocean, as well as the use stable isotope and organic-geochemical indicators to reconstruct environmental conditions in the past.

Latest Publications

Paper

October 2024

Su, G., Z. Guo, Y. Hu, Q. Zheng, J. Zopfi, J., M.F. Lehmann, N. Jiao (2024). Tidal control on methanotrophic activity and mitigation of methane emissions from coastal mangrove sediments. Environmental Research. Vol. 263, Part I, 120049; https://doi: 10.1016/j.envres.2024.120049

Tabelle

July 2024

Frey, C., W. Tang, B. B. Ward, and M. F. Lehmann. 2024. Sample preservation methods for nitrous oxide concentration and isotope ratio measurements in aquatic environments. Limnol. Ocean. Methods 1–18. doi:10.1002/lom3.10638

Isotopic composition and mass accumulation rate of organic carbon

July 2024

First lacustrine application of the diatom-bound nitrogen isotope paleo-proxy reveals coupling of denitrification and N2 fixation in a hyper-eutrophic lake
Anja S. Studer, Lars Wörmer, Hendrik Vogel, Nathalie Dubois, Maciej Bartosiewicz, Kai-Uwe Hinrichs, Fabio Lepori, Moritz F. Lehmann

May 2024

May 2024

Solid phase speciation controls copper mobilisation from marine sediments by methanobactin
D. D. Rushworth, W. D.C. Schenkeveld, N. Kumar, V. Noël, J. Dewulf, N. A.G.M. van Helmond, C. P. Slomp, M. F. Lehmann, S. M. Kraemer (2024)

Sediment

January 2024

Controls and significance of priming effects in lake sediments.Global Change Biology
Bartosiewicz, M., A. Przytulska, A. Birkholz, H. Niemann, J. Zopfi, M. F. Lehmann (2024)

de Carvalo

January 2024

Improving the accuracy of δ18O and δ17O values of O2 measured by continuous-flow isotope-ratio mass spectrometry with a multipoint isotope-ratio calibration
deCarvalho, C.F.M., M.F. Lehmann, S. G. Pati (2024)

Ehrenfels

October 2023

Hydrodynamic regimes modulate nitrogen fixation and the mode of diazotrophy in Lake Tanganyika. Nature Communications.
Ehrenfels., B., K.B.L. Baumann, R. Niederdorfer, A.S. Mbonde, I.A. Kimirei, T. Kuhn, P. Magyar, W. Mohr, D. Odermatt, C.J. Schubert, H. Bürgmann, M.F. Lehmann, B. Wehrli, and C. M. Callbeck (2023)