The conclusion is that future changes in ocean acidity will potentially impact the population size and dynamics, as well as the community structure of calcifiers, and will therefore have negative impacts on marine ecosystems» (judithcurry.com)
«[T] here have been a few claims for already realized impacts of ocean acidification on calcifiers, such as a decline in the number of oysters on the West Coast of North America (Barton et al. 2012) and in Chesapeake Bay (Waldbusser et al. 2011). (co2coalition.org)
Increasingly acidic waters due to buildup of atmospheric carbon dioxide is diminishing Great Barrier Reef corals, robbing sharks of their predatory senses, and hindering sea stars and other calcifiers in their ability to store calcium carbonate, which is crucial in forming their protective skeletons. (natureworldnews.com)