The latest news from Eawag

The Himalayan Balsam is a widespread invasive species in Switzerland that can also affect neighbouring aquatic ecosystems. (Photo: Florian Altermatt, Eawag)
Impacts of invasive species transcend ecosystem ...
April 4, 2024

Invasive species influence biodiversity across larger spatial extents than previously thought. In a recently published study, researchers from Eawag and the University of Zurich show that the impacts of invasive species extend far beyond the ecosystems they invade and that three mechanisms are primarily responsible for this. These findings are of great importance for the management of ecosystems.

Revision of the Plant Protection Products Ordinance: ...
April 3, 2024

Eawag and the Ecotox Centre welcome a total revision of the Plant Protection Products Ordinance (PPPO). However, the two institutes are calling for improvements on important points, such as the adoption of EU authorisations or the precautionary principle. The ordinance must ensure that other regulations such as the Water Protection or the Environmental Protection Act are not undermined.

The two new Swiss postage stamps, which will be available in May, depict endangered species from Lake Thun and the River Doubs. (Image: Post CH Netz AG)
Endangered underwater world in postage stamp format
March 21, 2024

Two new Swiss postage stamps, created with the support of Eawag, focus attention on the endangered biodiversity in Swiss water bodies.

Barriers such as the Müllerschwelle weir in the River Zulg in Steffisburg hinder or prevent fish migration. The Water Protection Act stipulates that such barriers must be rehabilitated and made passable for fish. In September 2023, the commune of Steffisburg began rehabilitation work on the Müllerschwelle weir to improve the connectivity along the River Zulg.  (Photo: Commune of Steffisburg, Mark van Egmond).
Improving fish migration with new concepts
March 7, 2024

Which barriers need to be removed for the greatest benefit of migratory fish? Where do the measures make the most sense and how do the costs relate to the benefits?

On a boat and a platform in Lake Rotsee, the Eawag research group carried out extensive measurements on the transport of gases in lake water (Photo: Tomy Doda, Eawag).
How gases travel laterally through a lake
January 25, 2024

At night or during cold winter days, lake water cools faster near the shore than in the middle of the lake. This creates a current that connects the shallow shore region with the deeper part of the lake. An international team led by Eawag researchers were able to show for the first time that this horizontal circulation transports gases such as oxygen and methane.