He also has a staff of volunteers who help measure water flow and leaf nutrients, and who keep an eye on the tree species that come and go in the forest.
"We study the seeding of plants," he says, "and you find that some seeds are eaten by birds, who then sit on a fence and excrete them, so you get a line of cherry trees, or persimmons, or sassafras along the line of an old fence." He added drily, "Poison ivy berries, too. I don't eat them myself, but the birds do."
By Michael Kernan