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Last Thursday, the Limnological Institute of the University of Konstanz hosted the first public forum.konstanz lake excursion. Nine interested members from the local community had the opportunity to participate in a scientific expedition on the research vessel "Robert Lauterborn." This fully booked event allowed participants to take part directly in the collection and analysis of plankton samples from Lake Constance.

The main focus of the excursion was the microscopic examination of zooplankton and phytoplankton. Guided by experts from the institute, the participants learned how to use plankton nets, water samplers, and various filtration techniques. They were also introduced to the use of multiparameter probes and DNA sequencing. A particular highlight was the participants’ independent preparation of plankton filtrates, which were then examined microscopically on board.

Especially impressive was the presentation of the glassy water flea, Leptodora, a predatory water flea up to one centimeter long that feeds on smaller crustaceans. Participants were able to observe this fascinating creature under the microscope and learn about its important ecological functions in the plankton of Lake Constance.

On the return journey, Professor David Schleheck delivered a lecture addressing the significantly increased phytoplankton growth this year, caused by severe storms and flooding in early June. The unusually high nutrient influx led to more intense algal blooms, which the institute’s scientists have thoroughly documented and analyzed. Additionally, the lecture covered topics concerning water quality for drinking purposes and the challenges facing the lake, such as the invasive quagga mussels and sticklebacks.

The event was a great success, providing residents with an exciting insight into the work of limnologists and the fascinating world of plankton within the Lake Constance ecosystem.