MSc. Bettina Eugster
Limnological Station
University of Zürich
Seestrasse 187
CH-8802 Kilchberg
b.eugster@limnol.uzh.ch

phone:
+41 (0)44 63 49214
fax:
+41 (0)44 63 41225
Research Interests
List of Publications

[ print version ]

Research Interests

Ciliates play apivotal role in the microbial food web of lakes. Due to their broad food rangethey act at different trophic levels. But knowledge about ciliates in Lake Zurich is scarce. The last publications originate from the 60ies and described observations of pelagic ciliate species only. My master thesis was the firstquantitative analysis of pelagic ciliates (during the spring bloom period) and included also a qualitative study of benthic ciliates in Lake Zurich.

In my PhD thesis, I investigate the ecology of ciliates in general but especially the interactions between ciliates and the main primary producer of Lake Zurich, the cyanobacterium Planktothrix rubescens. This cyanobacterium is supposed to be toxic for all eukaryotes due to the cell internal storage of microcystins and other harmful secondary metabolites. Interestingly, in Lake Zurich several protistan species have been discovered which prefer P. rubescens as their main food source. In my PhD-project I will focus on two ciliate species, Obertrumia aurea (Nassophorea) and Trithigmostoma cucullulus (Phyllopharyngea). Meanwhile, I can work with several clonal isolates which are kept on a diet of an axenic P. rubescens strain (A7). I study the aut- and the synecology of the isolates with a special focus on the interactions with the toxic cyanobacterium.

Specific questions


List of Publications

Derlon, N., Koch, N., Eugster, B., Posch, T., Pernthaler, J., Pronk, W., and Morgenroth, E. (2013). Activity of metazoa governs biofilm structure formation and enhances permeate flux during Gravity-Driven Membrane (GDM) filtration. Water Res 47, 2085-2095.
Link

Pomati, F., Kraft, N.J.B., Posch, T., Eugster, B., Jokela, J., and Ibelings, B.W. (2013). Individual cell based traits obtained by scanning flow-cytometry show selection by biotic and abiotic environmental factors during a phytoplankton spring bloom. PLOS ONE 8 (8), 1-11.
Link

Eckert, E.M., Salcher, M.M., Posch, T., Eugster, B., and Pernthaler, J. (2012) Rapid successions affect microbial N-acetyl-glucosamine uptake patterns during a lacustrine spring phytoplankton bloom. Environ Microbiol 14:794-806
Link