Paleontological research on prehistoric diets

Recent paleontological research has provided new insights into the dietary habits and evolutionary adaptations of prehistoric species.

One study published in Frontiers in Ecology and Evolution utilized carbon isotope analysis of fossilized teeth and bones to suggest that dinosaurs, crocodiles, turtles, and fish may have consumed seafood washed onto ancient beaches. By examining the ratio of light (C-12) and heavy (C-13) carbon isotopes, researchers identified a process known as ‘marine subsidization.’ This occurs when marine matter is washed ashore by storms, providing supplemental nutrients to terrestrial organisms. Dr. Clayton Forster of the University of Arkansas noted that coastal organisms in Cretaceous greenhouse climates relied on these resources similarly to modern organisms.

In a separate study, researchers at Flinders University examined placoderms—the first vertebrates to evolve jaws and teeth approximately 400 million years ago. Using 3D reconstructions and finite element analysis on fossils from Western Australia, scientists discovered diverse biting strategies among these armored fish. While smaller species used flat plates to crush prey, larger species evolved sharp teeth to pierce armored prey.