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. bYUkVcrz3sn1EJ4UT4E3OA90fPv4VtN5vh5Pl6wH+1rHsdZzcltjBmyPoG/bynnP