A factor or limiting resource is a factor that controls a process, such as organism growth or species population, size, and is limited to all plants in the understory unless more light becomes available (such as in the event of a tree fall).
A factor or limiting resource is a factor. This factor controls a process. This is such as organism growth. This is such as species population. This factor is limited to all plants in the understory. More light becomes available (such as in the event of a tree fall). Organism growth is size. Species population is size.