About David Rains Wallace:
David Rains Wallace is an author of more than sixteen books on conservation and natural history, including The Monkey's Bridge (a 1997 New York Times Notable Book) and The Klamath Knot (1984 Burroughs Medal). He has written articles for the National Geographic Society, The Nature Conservancy, the Sierra Club, and other groups. Wallace's work also has appeared in Harper's Magazine, The New York Times, Sierra, and other periodicals.
Compared to forest or aquatic ecosystems, grassland is unstable. It requires rather precise geological and climatic conditions, and if these conditions are not maintained--if too much rain falls, or too little--it quickly turns into forest or desert,...David Rains Wallace