Dr. Katrin Wendt-Potthoff
Dr. Katrin Wendt-Potthoff
Tel. 49 391 810 9810
Fax 49 391 8109150
1961 Born in Bremen, Germany
1981 - 1988 Study of Biology at the Technical University of Braunschweig. Master's thesis about "Laboratory experiments on the burrowing activity of Lumbricus terrestris".
1988 - 1992 Federal Institute of Biology for Agriculture and Forestry, Biochemistry and Plant Virology Division, Braunschweig
1994 PH.d. about "Microcosm experiments on the fate and effects of genetically altered Pseudomonas syringae pathovar syringae", Dr. habil. Horst Backhaus
1992 - 1995 Research Scientist at the GKSS Research Centre, Institute for Inland Water Research
since 1995 Research Scientist at the UFZ, Dept. Lake Research
since 2005 Group Leader Lake Microbiology
2014 habilitation at the University of Potsdam
since 2014 assistant professor University of Potsdam
My research interests comprise miscellaneous aspects of aquatic microbiology and biogeochemistry. I am especially interested in the influence of micro-organisms on geochemical processes.
Current work focuses on the microbiology of stratified lakes, in particular the anaerobic processes in sediments and at boundary layers (chemoclines) in the water column. Of special interest is the interaction of iron, manganese and sulfur cycling and the zonation of biogeochemical processes. I currently investigate three different types of lakes. These are firstly reservoirs, where I study the relative contributions of different microbial respiratory processes to carbon cycling. Release of manganese to the water column is a key issue here. Secondly, I investigate meromictic acidic pit lakes in Spain, where iron and sulfur cycling are quantified and the potential for natural neutralization is estimated, based on long-term experience with acid lakes in Lusatia, Germany (Spain project). Third of all, in the framework of a German-Canadian project initiative I study tailings ponds and end pit lakes which result from oil sands extraction in Canada (HAI Oil Sands Tailings Ponds project). The focus of this research is the sulfur cycle and its regulation, in order to stimulate precipitation of metals and degradation of organic contaminants, and to limit the release of toxic hydrogen sulfide.
In addition to biogeochemical processes I study the microbial populations in these partly extreme habitats. Steep gradients of pH-value and oxygen, high concentrations of dissolved inorganic substances, and accumulation of humic substances or toxic organic acids may select for organisms which tolerate these conditions. Beyond that, such organisms might contribute to an improvement of the water quality. Finally, I am interested in microbial bioconversion of external carbon sources, mainly natural terrestrial or aquatic organic matter.