ocean acidification

Greatest mass extinction driven by acidic oceans, study finds

Changes to the Earth’s oceans, caused by extreme volcanic activity, triggered the greatest extinction of all time, a study suggests. The event, which took place 252 million years ago, wiped out more than 90 per cent of marine species and more than two-thirds of the animals living on land. It happened when Earth’s oceans absorbed huge amounts of carbon dioxide …

Ocean

Oxygen-depleted oceans had key role in mass extinction over 200M years ago

Changes in the biochemical balance of the ocean were a crucial factor in the end-Triassic mass extinction, during which half of all plant, animal and marine life on Earth perished, according to new research involving the University of Southampton. The study, published in the upcoming edition of Geology, reveals that a condition called ‘marine photic zone euxinia’ took place in …