Experience Eawag research on Lake Greifensee

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The Lake Greifensee boat approaches the Eawag research platform.

The Lake Greifensee boat approaches the Eawag research platform.

Lake Greifensee is almost on Eawag’s "doorstep" and is therefore used extensively for its water research. Last Friday, interested visitors learned about how the researchers work and what they have discovered about the lake during an enjoyable boat trip. There will be another opportunity for this in autumn.

On a perfect summer evening, the boat "Stadt Uster" set sail last Friday. While the passengers were sipping their aperitifs, the boat headed first for the Eawag research platform anchored off the small town of Greifensee. There, the researchers demonstrated the methods used to monitor bodies of water. While traditional methods are costly and therefore only provide data with low temporal and spatial resolution, the underwater microscope "Aquascope" anchored to the platform, for example, functions fully automatically and delivers real-time information on the plankton in Lake Greifensee.

The fascinating world of plankton

While the boat makes its round on the lake and the guests enjoyed the appetisers, Francesco Pomati, group leader in the Aquatic Ecology Department at Eawag, and Ewa Merz, a PhD candidate in the same research group, explained to them why lakes need to be monitored, how the underwater camera recordings are evaluated and how conclusions can be drawn about impending toxic algal blooms. At the same time, the researchers also demonstrated to the guests how fascinating the world of plankton is. After all, the small dots in the water samples that the researchers have brought with them turn out to be multifaceted creatures of great beauty under the microscope.


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