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. t6/YLkNhF6eXjQRyJIiSMv7cWJ77RAj/vv1CL+4DcxE2+LeYq4g7MgKzA0CUpZDX