“Ocean conditions are already more extreme than those experienced by marine organisms and ecosystems for millions of years,” the researchers say in the latest issue of the journal Trends in Ecology and Evolution (TREE). “This emphasises the urgent need to adopt policies that drastically reduce CO2 emissions.”
Ocean acidification, which the researchers call the ‘evil twin of global warming', is caused when the CO2 emitted by human activity, mainly burning fossil fuels, dissolves into the oceans. It is happening independently of, but in combination with, global warming.
“Evidence gathered by scientists around the world over the last few years suggests that ocean acidification could represent an equal - or perhaps even greater threat - to the biology of our planet than global warming,” co-author Professor Ove Hoegh-Guldberg of the ARC Centre of Excellence for Coral Reef Studies and the Global Change Institute at The University of Queensland said.
More than 30 percent of the CO2 released from burning fossil fuels, cement production, deforestation and other human activities goes straight into the oceans, turning them gradually more acidic. “The resulting acidification will impact many forms of sea life, especially organisms whose shells or skeletons are made from calcium carbonate, like corals and shellfish," he said.
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