In the new study, researchers have discovered a new culprit, which is likely to have been involved in the Earth's largest extinction event that occurred 250 million years ago, when rapid climate change wiped almost all marine species, and most of these countries.
According to the researchers, the influx of mercury in the ecosystem may have been mass extinctions.
"Nobody had ever looked to see if mercury had the potential culprit. This was the time history of the Earth's largest volcanic eruption, and we know today as the largest source of mercury from volcanic eruptions," Steve Grasby, co-author of the paper University of Calgary, said.
"We estimate MERCURY you could have up to 30 times higher than today's volcanic activity, which makes the event truly catastrophic," he said.
About 250 million years ago, long before dinosaurs ruled the earth, and all form one big continent, the majority of ocean life and the earth was wiped out.
The idea is generally accepted that volcanic eruptions, although burned coal beds, releasing CO2 and other deadly toxins. Direct evidence of this theory was described in a paper, published in January last year, these same authors in the journal Nature Geoscience.
Mercury deposition rates could be significantly higher in the late Permian compared to today's human-caused emissions. In some cases, mercury in the late Permian ocean was similar to that which is found near the highly contaminated ponds near the smelters, which have severely damaged the water system, scientists say.
"We are adding levels of industrial emissions. This is a warning for us here on earth today," said Benoit Beauchamp of the University of Calgary.
No matter what happens, this study demonstrates the tenacity of life. "The story is one of the recovery as well. After the system was overwhelmed and destroyed most of life, the oceans were still able to clean itself and we were able to move to the next stage of life," Hamed Sanei University of Calgary, said.
The study is published in the journal Geology.
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