Wetlands, rivers, lakes, and coastal estuaries are all aquatic ecosystems—critical elements of Earth’s dynamic processes and essential to human economies and health. Wetlands connect land and ...

An estuary is the section of a river mouth that is within the reach of ocean tides. They store large amounts of carbon and provide a habitat for fish, birds and marine mammals.

Wetlands are ecosystems ... wet grasslands, peatlands, oases, estuaries, deltas and tidal flats, mangroves and other coastal areas, coral reefs, and all human-made sites such as fishponds ...