“Scientists in the Harz mountains in Germany have discovered that this really is a case of interdependence, and most individual trees of the same species growing in the same stand are connected to each other through their root systems. It appears that nutrient exchange and helping neighbors in times of need is the rule, and this leads to the conclusion that forests are superorganisms with interconnections much like ant colonies.”
Wohlleben, Peter (2016-09-13). The Hidden Life of Trees: What They Feel, How They Communicate�Discoveries from a Secret World (Kindle Locations 131-134). Greystone Books. Kindle Edition.