Termites are a beneficial addition to the forest garden, helping to decompose dead wood and turn it into fertile soil.
Additionally, they aerate the soil which can help water and nutrients reach the plants and trees better, meaning trees grow faster.

There aren't many insects, or anything for that matter, that can decompose trees and almost any plant like termites can. Not only that, they also put the nutrients that were taken from that plant and put them back into the soil when they are decomposed.