Organisms exposed to challenging environments face evolutionary pressure to adapt, which could lead to modifications in a variety of traits, such as morphology, physiology and behaviour.

The live images from the Aquascope reveal an amazing underwater world. Lake Greifen is home to a smorgasbord of wonderful creatures - star-shaped, cylindrical, horned or extravagantly coiffed.

Parasitic wasps act as biological weapons against aphids in pest control. With the help of symbionts, however, some aphids try to defend themselves against the attacks.

126 Swiss researchers, including 6 from Eawag, want to draw the attention their Swiss compatriots to the scientific evidence showing the between the emergence of pandemics and human disturbance of the natural environment.

Catherine and Florian, the theme of the International Day for Biological Diversity (IDB) is "Our solutions are in nature". What does that mean from your point of view?

Environmental problems are generally complex, and the ecological processes and actors involved are often closely interlinked.

Rain enables crops to grow, but it also causes the run-off of pesticides to rivers and streams. Concentrations of these substances in surface waters can be monitored by means of regular sampling.

Around 500 different cichlid species are found in Lake Victoria. According to a study by scientists at Eawag and Bern University, whether closely related species can persist within the same area depends on the effect sizes of individual genes underlying key mate-choice traits.

Today, one third of the world's population obtains its drinking water and water for irrigation from groundwater reserves.

A fundamental characteristic of ecological communities is that small animals are more abundant than large ones.