Biologists say that trees are keenly aware of one another, that they have social systems and help each other. Trees reach out their upper limbs in different ways, mostly so that every tree will get some sunlight. If trees are sick, or hurting, or hungry, they will reach out to other trees and use their roots to offer them food and help them to heal.
Trees are said to keep trunks alive for years, and also to communicate with one another. Walking in the forest, looking up, I can almost see this happening, if you stand still it feels like they are communicating, gathering in a circle. In the deep forest, the sunlight does not reach too far down, the branches widen at the top. This is perhaps the Canopy of Peace God talks about in the Kabbalah.