Marine life rebounded quickly after the global mass extinction


American scientists conducted a study and found that reptiles quickly captured the world’s oceans after a global extinction of marine life on Earth.

A new study led by U.S. the University of California proved the fact of the rapid recovery of marine life on the planet. Global climate change, caused, most likely, massive volcanic eruptions that destroyed 95% of all marine species in the ocean about 250 million years ago in the late Permian period. The researchers placed a publication in the journal Scientific Reports yesterday, June 13, that terrestrial reptiles have colonized the ocean just 3350000 years in the early Triassic.

The group of researchers comprised of international scientists from China, USA and Italy, and rock samples for analysis were taken from the city of Chaohu in South China. The oldest marine reptiles, according to the fossils, there 248,81 million years ago. More exact date, researchers still find it difficult to name. These first marine reptiles, including dolphins as ichthyosaurs, continued to rule the seas in the Mesozoic era of the dinosaurs. At the same time, there have been significant changes in ocean chemistry and the carbon cycle. Vertical mixing of ocean water ceased during or shortly after a mass extinction, causing widespread depletion of oxygen in the ocean. “We link the biotic recovery and the beginning of a new marine ecosystem to the final collapse of the stratification of the ocean and return to oxidized ocean,” said Montanes, one of the scientists.

The Earth’s orbit is shifting from rounded to elliptical and back that leads to a change in carbon cycles. These orbital gyrus provide a means for precise Dating of the first occurrences of Mesozoic marine reptiles.

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