Scientists examined around 23,500 species of dragonflies, fish, crabs and other animals that depend exclusively on freshwater ecosystems.

Freshwater ecosystems cover less than 1% of Earth but support 10% of all species. Nearly a quarter of these species face ...

“Almost every big river in North America and Europe is massively modified” through damming, putting freshwater species at risk, he said. In South America, the vast Amazon River ecosystem also ...