So says Peter Wohlleben, a professional forester in Germany. He is reporting on his own experience and that of scientists. Their theory is that there is a vast underground network, called a mycorrhiza, in which fungi connect trees of different species by passing chemical and electrical signals among the trees’ roots. It was an arboreal Internet—christened the “wood wide web.” Trees could actually communicate by exchanging carbon through their roots. The exchange offered mutual support. Carbon is the food of trees, created by photosynthesis, using the leaves as solar panels. Sometimes one tree would act as mother to its neighbors, giving them more carbon than it received in return. Later the debt would be repaid as the roles were reversed.
Continued studies told the scientists that trees exchanged vital information, warning their neighbors (and children) of threats and advising them of opportunities to seize. For example, if a tree’s leaves are bitten by a caterpillar, it will send a message though the mycorrhiza, prompting other trees in the network to release chemicals that repel caterpillars.
Wohlleben believes trees have feelings, they knew how to communicate with one another, and that the strong assist the weak.