Ocean acidification: the other CO2 problem

On 8/7/06, Robert wrote:
(...)
> the more co2 that is in the water, the higher the consentration of
> plants and animals that use the co2 for their cycle, and the more
> fish that feed on them. the jar did not contain the plants that
> convert the co2 to o2 and carbon
(...)

Interesting point. However, I am not sure about how fast sea plants
could counterbalance the CO2 increase. We know that in the atmosphere
plant growth is not being quick enough to absorb all the CO2 dumped on
it. Are there similar studies trying to measure if there has been any
increase in oceanic CO2 as well?