Light intensity directly impacts the photosynthetic rate of algae, in turn affecting their overall physiological activities. Insufficient light can limit photosynthesis and pigment synthesis in macroalgae (H.L. Wu et al., 2015).
Like all photosynthetic organisms, macroalgae rely on light to fuel their growth and development. Understanding what light is best for macroalgae is essential for successful cultivation, whether in a home aquarium or a large-scale commercial operation.
Herbivorous reef fishes and invertebrates graze heavily on macroalgae and control its growth in the process. In their absence, or in the presence of excess nutrients, algae will overgrow the coral, blocking incoming light and impeding coral photosynthesis and growth.
For a refugium to work properly, the macroalgae must be actively growing and taking in nutrients. If your refugium has poor lighting, the macroalgae wont be able to quickly remove nutrients, and theyll build up in the main tank. This leads to algae growth on the glass and live rock.
This study aimed to examine the effects of water turbulence and various wavelengths of light on the growth and physiology of U. australis.
