Fig. 3
Growth response of Porites astreoides corals. The modelled growth response displays relative changes in calcification rate (relative calcification rate = mean control/individual colony). Calcification rates were calculated following the IpHRAC model19 (internal pH regulation and abiotic calcification: Calcification = k*(Ωcf−1)n) with calcifying fluid aragonite saturation state (Ωcf) was calculated from the average internal calcifying fluid pH (pHcf) of individual colonies and the dissolved inorganic carbon (DICcf): in a dependent variable Ωcf is based on DICcf and pHcf and b depicts the respective calculated calcification rates. Circles represent values for each individual coral colony (mean ± confidence interval). Filled and non-filled symbols denotes the different locations: filled are the centres of the ojos with lower seawater aragonite saturation state (Ωsw) and non-filled the control high Ωsw site. We compared calculated values with measured data11 (for better comparison also calculated as relative rate, open triangles). Individual values are mean ± 95%-confidence interval
