Absorption and utilization of radiant energy by light-and shade- adapted colonies of the hermatypic coral Stylophora pistillata.

Quantum yields of photosynthesis varied from 0.10 CO₂ per quantum at low light to <0.001 CO₂ per quantum at maximal irradiances. Shade-adapted corals had higher pigment content, which allowed them to have twice as much light harvesting capability as light-adapted corals. In all cases, however, the quantum yield of the light-adapted corals was higher by a factor of approx 1.5.-from Authors