Posted by: Saving Water SA (Cape Town, South Africa) - partnered with Water Rhapsody conservation systems – 21 May 2010
Acidification of the oceans means “double trouble” for marine life from corals to shellfish since it is adding to stresses caused by global warming, a study showed on Wednesday.

Sea Butterfly. Picture: Kevin Raskoff, Hidden Ocean 2005 Expedition: NOAA Office of Ocean Exploration.
“The oceans are more acidic than they have ever been for at least 20 million years,” according to the report by the European Science Foundation. On current trends, seas could be 150% more acidic by 2100 than they were in pre-industrial times.
Sea water is acidifying because carbon dioxide, released to the atmosphere from burning fossil fuels, is slightly corrosive in water. That makes it harder for creatures such as corals, lobsters, crabs or oysters to build their protective shells.
“Ocean acidification…is double trouble because it is happening on top of global warming,” Jelle Bijma, lead author of the report and a professor at the Alred Wegener Institute for Polar and Marine Research in Germany, told Reuters.
“Coastal zones such as in the Mediterranean and North Seas are rich in calcifying organisms such as shellfish that may be particularly sensitive to large changes in carbon chemistry,” a statement said.
Seas have already become 30% more acidic in the past 200 years – the oceans have absorbed about 430 billion tons of carbon dioxide, or about one third of emissions by human activities since the Industrial Revolution. Continue reading Ocean acidification means double trouble for marine life