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. qIReoaZD1am9LNqdQLPTi5q03DHvcFcAwlxO9G2LQ304hTNby+aayulA4Veal3pg