Coral calcification station

Underwater photograph of a calcification station (1 of 40). Attached are a colony of the reef-building coral Siderastrea siderea (top), a temperature logger (black, on right), and an "accretion tile" (white, on left) for collecting crustose coralline algae, calcifying organisms that help cement reefs and provide reef-building coral larvae a place to settle. The growth rates of these important calcifiers were also monitored during the study. Figure 2 from "Calcification rates of the massive coral Siderastrea siderea and crustose coralline algae along the Florida Keys (USA) outer-reef tract" in Coral Reefs.