Environment ❯ Ecosystems ❯ Aquatic Ecosystems

Freshwater Ecosystems

Crocodile Population Species Interactions Salmon Migration Adirondack Ecosystems Fish Populations Mosasaur Habitat

Mosasaurs Lived in Rivers Near the End of the Cretaceous, Isotope Study Finds

Multi‑proxy isotopes from three North Dakota teeth point to riverine life enabled by a freshening Western Interior Seaway.