Dr. Marco Lehmann

Fonction

collaborateur scientifique

Dynamique forestière

Écologie des écosystèmes

Contact

marco.lehmann(at)wslto make life hard for spam bots.ch

+41 44 739 21 99+41 44 739 21 99

Institut fédéral de recherches sur la forêt, la neige et le paysage WSL
Zürcherstrasse 111
8903 Birmensdorf

Site

Birmensdorf Bi HL D 35

Research Interests

As a ecophysiologist and biogeochemist I am interested how carbon, water and nutrients move through a plant, how environmental changes drive plant physiological and metabolic responses, and how information about this processes can be derived from the stable isotopic composition of plant material. I like to combine experimental plant studies with research tools from various disciplines such as compound-specific isotope analyses (LC- & GC-IRMS, IRIS & CRDS), plant physiological measurements (gas-exchange & leaf traits), plant molecular biology (plant mutants), and biochemical approaches (enzyme activities, compound concentrations).

Recently, I lead a SNF Ambizione research project (TreeCarbo) focusing on carbon, oxygen, and hydrogen isotopic composition of carbohydrates (sugars, starch, tree-rings) to better understand how information about plant functions and climatic conditions are laid down into tree-ring archives. Besides, I develop a new compound-specific nitrogen isotope method to study wood decomposer food webs (IsoWeb).

My social media accounts:

https://www.researchgate.net/profile/Marco_Lehmann

https://scholar.google.ch/citations?user=zNwNJSUAAAAJ&hl=en

Scientific Career

SNF-Ambizione Group Leader, Swiss Federal Institute WSL, "Triple isotope analysis of carbohydrates: From assimilates to tree-rings (TreeCarbo)", 05/2019 - today
Postdoctoral Research Associate, Swiss Federal Institute WSL,"Analysing temporal and spatial changes in wood decomposer food-webs using novel stable isotope techniques (Isoweb)",10/2018 - 04/2019
Postdoctoral Research Associate, Swiss Federal Institute WSL, "Oxygen isotope fractionations among plant assimilates", 01/2017 - 10/2018
Postdoctoral Research Associate, Paul-Scherrer Institute, "Developing new methods for oxygen isotope analysis", 08/2014 - 12/2016
Ph.D. (Dr. sc.),ETH Zurich, "Carbon isotopic composition of leaf dark-respired CO₂: Influence of different substrates and environmental drivers", 02/2011 - 07/2014
Diplom (eq. M. sc.) Molecularbiology, Saarland University, "Characterization of genetic factors in the network of metal homeostasis in Arabidopsis thaliana", 04/2004 - 09/2010

FURTHER INFORMATION

Publications WSL

Scientific publication article peer reviewed

Zhang, Y.; Yang, Y.; Saurer, M.; Schaub, M.; Gessler, A.; Lehmann, M.M.; Rigling, A.; Walser, M.; Stierli, B.; Hajjar, N.; Christen, D.; Li, M., 2023: Sugar infusion into trees: a novel method to study tree carbon relations and its regulations. Frontiers in Plant Science, 14. doi: 10.3389/fpls.2023.1142595

Vitali, V.; Peters, R.L.; Lehmann, M.M.; Leuenberger, M.; Treydte, K.; Büntgen, U.; Schuler, P.; Saurer, M., 2023: Tree-ring isotopes from the Swiss Alps reveal non-climatic fingerprints of cyclic insect population outbreaks over the past 700 years. Tree Physiology, doi: 10.1093/treephys/tpad014

Saurer, M.; Sahlstedt, E.; Rinne-Garmston, K.T.; Lehmann, M.M.; Oettli, M.; Gessler, A.; Treydte, K., 2023: Progress in high-resolution isotope-ratio analysis of tree rings using laser ablation. Tree Physiology, doi: 10.1093/treephys/tpac141

Tang, Y.; Schiestl-Aalto, P.; Lehmann, M.M.; Saurer, M.; Sahlstedt, E.; Kolari, P.; Leppä, K.; Bäck, J.; Rinne-Garmston, K.T., 2023: Estimating intra-seasonal photosynthetic discrimination and water use efficiency using δ¹³C of leaf sucrose in Scots pine. Journal of Experimental Botany, 74, 1: 321-335. doi: 10.1093/jxb/erac413

Li, Y.; Riedl, A.; Eugster, W.; Buchmann, N.; Cernusak, L.A.; Lehmann, M.M.; Werner, R.A.; Aemisegger, F., 2023: The role of radiative cooling and leaf wetting in air-leaf water exchange during dew and radiation fog events in a temperate grassland. Agricultural and Forest Meteorology, 328: 109256 (16 pp.). doi: 10.1016/j.agrformet.2022.109256

Tout afficher

Further Publications (peer-reviewed)

Lehmann M.M., Fischer M., Blees J., Zech M., Siegwolf R.T.W., Saurer M. (2016). A novel methylation derivatization method for δ18O analysis of individual carbohydrates by gas chromatography/pyrolysis–isotope ratio mass spectrometry. Rapid Communications in Mass Spectrometry, 30, 221–229. http://onlinelibrary.wiley.com/doi/10.1002/rcm.7431

Lehmann M.M., Wegener F., Barthel M., Maurino V.G., Siegwolf R.T.W., Buchmann N., Werner C., Werner R.A. (2016). Metabolic fate of the carboxyl groups of malate and pyruvate and their influence on δ13C of leaf respired CO2 during light enhanced dark-respiration. Frontiers in Plant Science, 7, doi: 10.3389/fpls.2016.00739. https://www.frontiersin.org/articles/10.3389/fpls.2016.00739/full

Lehmann M.M., Wegener F., Werner R.A., Werner C. (2016). Diel variations in carbon isotopic composition and concentration of organic acids and their impact on plant dark respiration in different species. Plant Biology, 18, 776-784. http://onlinelibrary.wiley.com/doi/10.1111/plb.12464/abstract

Lehmann, M.M., Rinne, K.T., Blessing, C., Siegwolf, R.T.W., Buchmann, N., Werner, R.A. (2015). Malate as a key carbon source of leaf dark-respired CO2 across different environmental conditions in potato plants. Journal of Experimental Botany, 66, 5769–5781. academic.oup.com/jxb/article-lookup/doi/10.1093/jxb/erv279

Projects

INSIghtForest: IN SItu tracking of water fluxes in Forest ecosystems

INSIghtForest will accompany the Cost Action WATSON "WATer isotopeS in the critical zONeproposes" by establishing a unique data set of high frequency in-situ measured water isotopes located in a long-term irrigation experiment Pfynwald in the naturally dry valley of Valais, Switzerland.

How does a changing light environment in terms of intensity and spectrum affect plant functioning?

Using stable isotopes, we want to investigate how a changing light quality could affect plant functioning and what mechanisms underlie these responses, especially when light interacts with other environmental factors.

Leaf temperature reconstruction

We critically lack leaf temperature assessments because of the difficulties associated with these measurements. The project aims at developing a novel approach that reconstructs leaf temperature over multiple time scales using plant water isotopes.

TreeWater - Disentangling the isotopic signal transfer from source water to tree rings

TreeWater aims to improve our understanding of whether and how information on water uptake dynamics can be retrieved from the oxygen and hydrogen (i.e. water) isotopes in tree rings.

ExtremeImpact

This project build up on high-resolution observations of conifer tree growth in the Swiss Lötschental valley to quantify at cell-based resolution the impact of the extreme summer drought 2015 on tree-ring biomass, sapwood conductivity, and water use efficiency.