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Biodiversity can also destabilize ecosystems

18 October 2018 – Species-rich ecosystems are more resistant to disturbances such as droughts, heatwaves or pesticide inputs – that, at least, is the view widely held by scientists and ...

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The USA is the largest exporter in the world of agricultural products, and therefore of virtual water. The image shows a field being watered in California (Image: Flickr)
October 15, 2018

Global trade is saving water on balance. In principle, this is a good thing. However, the water budget has its dark side – a fact which Eawag researchers have now brought to light. Read more

Stonefly larva (Photo: Silvana Käser, Eawag)
October 11, 2018

Mountain rivers swollen by heavy rainfall deposit large amounts of sediment in reservoirs. To prevent the loss of storage capacity, some reservoirs are equipped with bypass tunnels which convey sediment-laden waters to downstream reaches. The fact that such tunnels offer ecological benefits as well as economic advantages was shown, for example, by a study carried out on the Solis reservoir in Graubünden. Read more

This satellite photo shows Lake Maracaibo in Venezuela on 7 February 2011. The green areas in the lake represent plankton; primarily blue algae, growing under the surface. (Photo: ESA)
October 4, 2018

When does the poisonous blue alga reach its critical point and how does the lake react to heat waves? In the future, satellite pictures will answer these questions in real time. This is demonstrated by an Eawag researcher’s new dataset.  Read more