Rivers and Streams

Freshwater ecosystems – rivers, streams, lakes and wetlands – cover less than 1% of Earth’s surface, yet they host extremely high biodiversity – almost 6% of all known species in the world.

One remarkable feature of waters is that they connect into an aquatic network – from springs and mountain streams over creeks, rivers, lakes and groundwaters to wetlands, estuaries, seas and oceans. Along the way, environmental, hydrological and landscape gradients shape diverse biological communities characteristic for each part.