Staff

Bernhard Wehrli

About Me

Research interests

Human activities are changing the cycles of carbon and nutrients in freshwater systems and we have to know what the consequences are. Which processes govern the recycling of nutrients, the elimination of pollutants, and the emission of trace gases in natural waters? How are dams affecting river ecosystems? Our team combines chemical sensors, stable isotope techniques, molecular ecology and numerical modeling to find quantitative answers.

The teams in our department work across disciplines to establish the scientific facts needed for a more sustainable management of aquatic resources.

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Projects

Many Rivers carry high loads of nitrogen due to leaching of agricultural fertilizers. Wetlands can help mitigating nitrogen eutrophication of coastal waters.

Nitrogen retention in the Danube Delta

We study the water quality of Andean Rivers associated with existing and proposed hydropower projects.
We examine the role of nitrogen for the functioning of the ecosystem in Lake Tanganyika

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Curriculum Vitae

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Publications

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Callbeck, C. M.; Ehrenfels, B.; Baumann, K. B. L.; Wehrli, B.; Schubert, C. J. (2021) Anoxic chlorophyll maximum enhances local organic matter remineralization and nitrogen loss in Lake Tanganyika, Nature Communications, 12, 830 (11 pp.), doi:10.1038/s41467-021-21115-5, Institutional Repository
Kleinschroth, F.; Winton, R. S.; Calamita, E.; Niggemann, F.; Botter, M.; Wehrli, B.; Ghazoul, J. (2021) Living with floating vegetation invasions, Ambio, 50, 125-137, doi:10.1007/s13280-020-01360-6, Institutional Repository
Mayr, M. J.; Zimmermann, M.; Dey, J.; Wehrli, B.; Bürgmann, H. (2020) Lake mixing regime selects apparent methane oxidation kinetics of the methanotroph assemblage, Biogeosciences, 17(16), 4247-4259, doi:10.5194/bg-17-4247-2020, Institutional Repository
Guggenheim, C.; Brand, A.; Bürgmann, H.; Sigg, L.; Wehrli, B. (2019) Aerobic methane oxidation under copper scarcity in a stratified lake, Scientific Reports, 9, 4817 (11 pp.), doi:10.1038/s41598-019-40642-2, Institutional Repository
Athavale, R.; Pankratova, N.; Dinkel, C.; Bakker, E.; Wehrli, B.; Brand, A. (2018) Fast potentiometric CO2 sensor for high-resolution in situ measurements in fresh water systems, Environmental Science and Technology, 52(19), 11259-11266, doi:10.1021/acs.est.8b02969, Institutional Repository

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Address

E-Mail: bernhard.wehrli@eawag.ch
Phone: +41 58 765 2117
Fax: +41 58 765 2168
Address: Eawag
Seestrasse 79
6047 Kastanienbaum
Office: SL B20

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Expert of

river restoration, hydrogeology, surface water, sediments

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Research Focus

  • Biogeochemical processes
  • Aquatic sensing systems
  • Human impacts on water quality
  • Effective water protection

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