L10: Competition between filter feeders in Lake Constance

The aim of this project is to investigate the effects of invasive mussels (Quagga mussel Dreissena rostriformis bugensis, Zebra mussel D. polyformus) on the Lake Constance food web (e.g. food availability for fish). It will also quantitatively assess the impact of invasive mussels on measures developed to counteract economic losses (e.g. decrease of fisheries yields) and to develop an effective management strategy for Lake Constance. For this, a better understanding of the competitive relationships between the filter feeders in Lake Constance is essential.

Project team

Swiss Federal Institute of Aquatic Science and Technology (Eawag), Department Aquatic Ecology, Switzerland

   PD. Dr. Piet Spaak – project leader, project management

   Dr. Stuart Dennis – scientist

   M.Sc. Linda Haltiner – PhD student

In collaboration with

   Prof. Dr. Karl-Otto Rothhaupt

University of Konstanz, Dept. of Biology – Limnological Institute, Germany

   Sampling performed by HYDRA Constance, Germany 

Picture 1: Daphnia hyalina (native waterflea species of Lake Constance)
Picture 2: algal cultures, food source for laboratory cultures of Daphnia
Picture 3: Daphnia galeata (in Lake Constance since the 1950s)

Supported by

Interreg Alpenrhein-Bodensee-Hochrhein/
EFRD – European Fund for Regional Development

Federal Office for the Environment (FOEN)

Swiss Federal Institute of Aquatic Science and Technology (Eawag)

University of Konstanz


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