Ocean Acidification: A Key Culprit in the Permian Extinction Event

by Jasmine October 3, 2026

written by Jasmine October 3, 2026

The Permian Extinction Event: Ocean Acidification as a Key Culprit

What Caused the Permian Extinction Event?

The Permian Extinction Event, which occurred 252 million years ago, was the most severe mass extinction in Earth’s history, with over 90% of species wiped out. The exact cause of this calamity has remained uncertain, but new research suggests that ocean acidification played a significant role.

Evidence from Ancient Rocks

Scientists have collected rocks from the seafloor that date back hundreds of millions of years. By analyzing the boron isotopes in these rocks, they have been able to reconstruct the ocean’s acidity levels in the past. Their findings indicate that the oceans were dangerously acidic during the Permian Extinction Event.

Volcanic Eruptions and Carbon Dioxide

Researchers believe that the acidification of the oceans was caused by massive volcanic eruptions in Siberia. These eruptions spewed huge amounts of carbon dioxide into the atmosphere, which dissolved into the oceans and formed carbonic acid.

Implications for Modern Oceans

The findings have important implications for our oceans today. Modern ocean acidification, caused by the absorption of carbon dioxide from human activities, is already having a negative impact on marine wildlife. Some scientists argue that we are currently in the midst of a sixth mass extinction event, affecting both land and sea animals.

The Rate of Carbon Release

The rate at which carbon dioxide is released into the atmosphere is a critical factor in ocean acidification. The Permian Extinction Event was triggered by a rapid release of carbon dioxide, similar to the rate of modern emissions from fossil fuels.

Effects on Marine Wildlife

Ocean acidification can have severe consequences for marine animals. It can damage their shells and skeletons, making them more vulnerable to predators and disease. It can also disrupt their reproductive cycles and ability to find food.

Examples of Affected Species

Some of the species that are particularly vulnerable to ocean acidification include sea snails, oysters, and coral. These animals rely on their shells or skeletons for protection and support. As the oceans become more acidic, their shells and skeletons become weaker and more susceptible to damage.

Preventing Future Extinction

To prevent a future mass extinction event, it is crucial to reduce our emissions of carbon dioxide. This can be achieved by transitioning to renewable energy sources, improving energy efficiency, and planting trees. By taking action now, we can help protect our oceans and the species that depend on them.

Jasmine

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