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. lhS+d8qMP/SnEHcKxiHuyFI0NURStxf0GbezsSqTuHfFIXwhjVwQzBe92uQ3YM/0