ABSTRACT
Wetlands and other water bodies around the world have been drastically altered by invasive species. Wetlands with strictly native vegetation are increasingly rare (Bazzaz 1986; Meffe and Carroll 1994; Cronk and Fuller 1995; Zedler and Rea 1998). Wetland invasives directly affect humans by obstructing water flow, reducing the recreational value of waters (lower accessibility, decreased fish production, clogged boat motors, increased habitat for hosts of parasitic diseases), and blocking hydroelectric and other installations (Van Zon 1977).
