Open Access

In situ studies of calcification and photosynthetic carbon fixation in the coralMontastrea annularis

  • D. J. Barnes1 and
  • D. L. Taylor2
Helgoländer wissenschaftliche Meeresuntersuchungen24:BF01609519


1. The effect of varying light intensities on the rates of calcification and CO2 fixation in the coralMontastrea annularis is described.

2. High light intensities, above the saturation point of symbiont photosynthesis, are shown to inhibit the rate of calcification in both shallow and deep specimens.

3. Light enhanced calcification in reef-building corals appears to be an energy-requiring process involving the active transport of calcium and carbonate ions, and the translocation of symbiont photosynthate.