Acknowledgments

We thank Carol Ann Chapman, R. Randall Schumann, Laura E. Strickland, and Paco Van Sistine for their work on this volume. We also thank David Olsen (now at Wildlife Conservation International) and Colby Loucks of the World Wildlife Fund, who graciously provided the ArcInfo coverage of the WWF ecoregion map. The research reported here was supported by the USGS Earth Surface Dynamics program. We also thank Dan Muhs and Laura Strickland for their thorough and valuable reviews of the manuscript. Mary Kidd carefully edited the manuscript, and Carol Quesenberry designed the cover.