Study of ocean acidification using natural volcanic C02 seeps

Another study - reported on the Physorg website - predicting the demise of coral reefs; a longer time-frame here: they say the die off may occur at the end of 21st Century
http://www.physorg.com/news/2011-05-ocean-acidification-diversity-resiliency-coral.html

that article's source listed as:
"Losers and winners in coral reefs acclimatized to elevated carbon dioxide concentrations," Nature Climate Change, June 2011.

More bad news for corals

An Australian researcher has found that acidification of the ocean gives some seaweeds an edge over their coral neighbours.

"The new study experimentally confirms this hypothesis using two of the most abundant species co-occurring—and competing—on the Great Barrier Reef. The branching coral Acropora intermedia and the brown fleshy seaweed Lobophora papenfussii were placed in tanks exposed to four different carbon dioxide-dosing regimes, simulating the range of historical and projected ocean acidification conditions: pre-industrial, present-day, mid-century and late-century carbon dioxide levels ...

 "The new study experimentally confirms this hypothesis using two of the most abundant species co-occurring—and competing—on the Great Barrier Reef. The branching coral Acropora intermedia and the brown fleshy seaweed Lobophora papenfussii were placed in tanks exposed to four different carbon dioxide-dosing regimes, simulating the range of historical and projected ocean acidification conditions: pre-industrial, present-day, mid-century and late-century carbon dioxide levels"

Click the link to see the short article on Seaweb.
Their  Source: Diaz-Pulido, G. et al. 2011. High CO2 enhances the competitive strength of seaweeds over corals. Ecology Letters 14(2): 156-162