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Dr. Anja Scherwaß

Curriculum vitae

1990-1996 Study of biology at the University of Cologne. Graduation ("Dipl.-Biol.")
1995 Study of limnology at the University of Vienna, Institute for Limnology (Erasmus-Grant of the European Union)
1996 Diploma thesis on problems of nitrite toxicity on macroinvertebrates and occurrence of nitrite in surface and interstitial water in a small river
1996-1997 Assistance at laboratory work and students courses at the University of Cologne, Department of Physiological Ecology, Prof. Dr. Neumann
1998 – 2001 Graduate Student at the University of Cologne: Ecological role of ciliates in the potamoplankton of the river Rhine
2001 - 2005 Postdoctoral Research Associate: Interactions between bacteria and protozoans: Feeding ecology of heterotrophic flagellates
March 2003 - May 2003 Research Stay at the Molecular Microbial Ecology Group (Prof. S.Molin) at the Danish Technical University, Lyngby
2005 - Research Associate (Permanent Position)



Research interests

Ecology of Protozoans, esp. Ciliates in Rivers, Biofilm Ecology, Bacteria-Protozoa Interactions, esp. Three Dimensional Structure investigated by Laser Scanning Microscopy

Recent publications

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Venter, P., Nitsche, F., Scherwass, A., Arndt, H. (2018): Discrepancies between molecular and morphological databases of soil ciliates studied for temperate grasslands of central Europe. Protist (in press)


Jeuck, A., Nitsche, F., Wylezich, C., Wirth, O., Hennemann, M., Troll, N., Bergfeld, T., Monir, S., Scherwaß, A., Arndt, H. (2017): A comparison of quantification methods for heterotrophic flagellates of different taxonomic groups. Protist 168: 375-391


Scherwass A., Erken M., Arndt H. (2016): Grazing effects of ciliates on microcolony formation in bacterial biofilms. In: "Microbial biofilms - Importance and Applications": 81-93 Ed: D. Dhanasekaran and N. Thajuddin


Ackermann, B., Esser, M., Scherwaß, A., Arndt, H. (2011) Long-term dynamics of microbial biofilm communities of the River Rhine with special references to ciliates. Int. Revue Hydrobiol. 96:1-19

Bergfeld, T., Scherwass, A., Ackermann, B., Fischer, H., Arndt, H., Schöl, A. (2011): Longitudinal and seasonal dynamics of the planktonic microbial community along the length of the River Rhine. River Systems 19(4): 337-349


Scherwass, A., Bergfeld, T., Schöl, A., Weitere, M. and Arndt, H. (2010): Changes in the plankton community along the length of the River Rhine: Lagrangian sampling and enclosure experiments, J. Plankt. Res. 32 (4): 491-502.


Bergfeld, T., Scherwass, A., Ackermann, B., Arndt, H., Schöl, A. (2009).: Comparison of the components of the planktonic food web in three large rivers (Rhine, Moselle and Saar)". River Research and Applications 25 (10): 1232-1250

Risse-Buhl, U., Scherwass, A., Schlüssel, A., Arndt, H., Kröwer, S., Küsel, K. (2009): Detachment and motility of surface-associated ciliates at increased flow velocities. Aquat. Microb. Ecol. 55: 209-218


Wey, J.K., Scherwass, A., Norf, H., Arndt, H., Weitere, M. (2008): Effects of protozoan grazing within river biofilms under semi-natural conditions. Aquat. Microb. Ecol. 52: 283-296


Scherwass, A., Fischer, Y., Arndt, H.(2005): Detritus as a potential food source for protozoans: consumption and digestion of plant detritus by a heterotrophic flagellate (Chilomonas paramecium) and a ciliate (Tetrahymena pyriformis). Aquatic Ecology 39(4): 439-445

Scherwass, A., Arndt, H. (2005): Structure, dynamics and control of the ciliate fauna in the potamoplankton of the river Rhine. Arch. Hydrobiol. 164(3): 287-307

Weitere, M., Scherwass, A., Sieben, K.-T., Friedrich, G., Arndt, H.(2005): Planctonic Food Web Structure and Potential Carbon Flow in the Lower River Rhine with a Focus on the Role of the Protozoans. River Research and Applications 21: 535-549


Scherwass, A., Wickham, S. A. , Arndt, H. (2002): Determination of the abundance of ciliates in highly turbid running waters - an improved method tested for the River Rhine. Arch. Hydrobiol. 156 (1): 135-146


Scherwass, A., Eimer, A. & Arndt, H. (2001): Selective influence of filter-feeding benthic bivalves (Corbicula sp., Mytilus sp.) on planctonic ciliates. Verh. Int. Verein. theor. angew. Limnol. 27: 3315-3318


Scherwass, A., Arndt, H. (1999): Ciliaten im Potamoplankton des Rheins: Reines Driftphänomen oder eigene Planktongemeinschaft?. Tag. Dt. Ges. Limnol: Erw. Zus.


Scherwass, A., Lorenz, D. & Neumann, D. (1996): Charakterisierung der Interstitialwasserbedingungen eines abwasserbelasteten Mühlengrabens. Tag. Dt. Ges. Limnol: Erw. Zus.