The buoyant weight method has been used in a laboratory experiment over an 18-day
period to assess effects of alizarin staining on the calcification rate of the hermatypic coral
Diploria strigosa (Dana). Exposure of corals to a concentration of 10 mg/l alizarin for 24 h in
a flow-through system caused a significant depression in calcification for a period of up to 6
days. It is suggested that such initial calcification depressions after staining could affect
absolute growth measurements and cause synergistic effects with experimental …