I wrote about this in my forthcoming book The Way of Nagomi, and I think the editor did not cut it (although at this particular moment I am not that sure). I think the Japanese art of bonsai is a great way for plants to share the ecological space.
When you see a great tree, it is all beautiful. At the same time, it means that the tree has a monopoly on the ecological niche. When you have bonsai, a tree can fulfil its life potentials in a limited space while allowing other entities to enjoy the adjacent spaces.
This, I think, is the most beautiful aspect of bonsai.