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Yes I do.. Experimental evidence says they calcify fine at high levels.
Every Marine aquarist, including yours truly knows this is not true at all.
You deny repeatable experimental evidence? Interesting.
Update to NOAA study designed to kill PacWest oysters with MONSTROUS CO2 levels....
Progress Reports: Ocean acidification and emerging diseases in the Pacific Northwest | Roberts Lab
Oyster Larvae Growth and Calcification at Three Different pCO2- Experimental conditions were maintained using a flow-through seawater system in Friday Harbor, Washington, USA. Three experimental treatments were chosen to correspond with dissolved CO2 levels of 400, 700 or 1000 ppm in the atmosphere. These levels correspond to near current ambient oceanic conditions, projections for mid-century pCO2, and end-of-century, respectively (IPCC 2007).
Larval size (shell height and hinge length) was similar across experimental treatments after 24 hours, however by day 3 larvae grew significantly larger (height and length) in the Ambient and MidCO2 compared to the HighCO2 treatment. Between days 1 and 3 larvae increased in size under Ambient conditions (shell height, P < 1e-7) and MidCO2 conditions (shell height, P < 1e-7; Figure 4). Developmental rate did not vary across treatments.
Every Marine aquarist, including yours truly knows this is not true at all.
You deny repeatable experimental evidence? Interesting.
As someone who was a marine aquarist for 19 years, I can tell you with no uncertainty that many marine organisms do not do well with abnormal increases (or decreases) in CO^2 concentrations. If they did, there would be no reason to ever be concerned about the concentrations of buffers in the system. Even fresh water organisms readily demonstrate vulnerability to changes in CO2 levels.
however by day 3 larvae grew significantly larger (height and length) in the Ambient and MidCO2 compared to the HighCO2 treatment. Between days 1 and 3 larvae increased in size under Ambient conditions (shell height, P < 1e-7) and MidCO2 conditions (shell height, P < 1e-7