Sunlight impacts litter decomposition in terrestrial ecosystems through the process of photodegradation. Previous studies on litter photodegradation focused on the effects of ultraviolet (UV) radiation, and only recently have the photodegradation effects of other spectral regions of sunlight (e.g., blue and green light) been addressed.
Click here for original story, Blue light is the key factor affecting leaf litter photodegradation
Source: Phys.org