To the people whose labors go beyond ideas into the realm of “real materials”—to the dry-land ecologists, wherever they may be, in whatever time they work, this effort at prediction is dedicated in humility and admiration. Jf/yygfHR/SN73K4NeC49VYHxU/7OjY6l0QnN+Xdw5BBt1UFwjNHU3V72SbqsQiD