Some months back I mentioned a fascinating study about a coral reef that was thriving at pH levels far lower than predicted by the most morbid of global warming doomsters. Hot on the heels of that rather surprising work comes another paper that finds that healthy coral reefs exhibit spikes in acidity:
The researchers observed the chemistry of the water on the reef between 2007 and 2012. During that time, there were two sharp spikes in acidity – once in 2010 and again in 2011.
The team found that coral growth itself made the water more acidic as the corals sucked alkaline carbonate out of the water to build their skeletons. The corals also ate more food during these high-activity periods and pumped more CO2 into the water, increasing acidity further.
One of the study authors wonders if coral are even bothered about ocean pH.