Seawater carbonate chemistry and coral community metabolism during year-long exposure to experimental elevated CO2 conditions

We describe year-long experiments in which back reef and fore reef (17-m depth) communities from Moorea, French Polynesia, were incubated outdoors under pCO2 regimes reflecting endpoints of representative concentration pathways (RCPs) expected by the end the century. Incubations were completed in 3–4 flumes (5.0 × 0.3 m, 500 L) in which seawater was refreshed and circulated at 0.1 m s-1, and the response of the communities was evaluated monthly by measurements of net community calcification (NCC) and net community photosynthesis (NCP).