Large Tides Played Important Role in Evolution of Bony Fish and Early Tetrapods, Study Suggests


Tides are a major component of the interaction between the marine and terrestrial environments.

They play an important part in shaping the environmental context for the evolution of shallow marine and coastal organisms.

“During long periods of the Earth’s history, we’ve had small tidal ranges,” said Professor Per Ahlberg, a researcher in the Department of Organismal Biology at Uppsala University.

“But in the Late Silurian and Early Devonian, they seem to have been large in some parts of the world.”

“These results appear highly robust, because even if we changed model variables such as ocean depth, we got the same patterns.”

For the study, Professor Ahlberg and colleagues used a dedicated tidal model and paleogeographic reconstructions from this critical period to explore the potential significance of tides for the evolution of bony fish and land vertebrates.

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