1. Murray S. Fernandez L. Zertuche-Gonzalez J. 2005. “Status, Environmental Threats, and Policy Considerations for Invasive Seaweeds for the Pacific Coast of North America.” Report prepared for the Commission for Environmental Cooperation, Montreal.
2. We used the year of the original study (2000) to index both these estimates. Individual estimates within these totals were not indexed in either of the aggregate estimates by Pimental et al. (2000) and Pimental, Zuniga, and Morrison (2005).