I wonder how those trees communicated then. I am reading "the hidden life of trees" at the moment, which talks quite a bit about how trees communicate using fungi. The fungi benefit from this by receiving certain nutrients.
Its an interesting symbiotic relationship for sure. When I was backpacking in Alaska I was basically walking non stop on lichen (which sort of looks like large tuft balls of colorful and very tiny coral reefs but super soft and springy). All of the animals there eat tons of this stuff. Its basically a hybrid between a plant and a fungi (not just a symbiotic relationship). Sort of like fungi-moss.
