Caulerpa taxifolia, once a harmless aquarium plant, is carpeting the Mediterranean, choking out all other aquatic plants.

Photos, information and other resources regarding the spread and control of aquatic and riparian invasive weeds, including Crassula helmsii, Hydrocotyle rannunculoides and Myriophyllum aquaticum.

Study in Hudson Valley, New York. Reprinted from Journal of Environmental Quality, 1999.

Discusses different categories of problem species and the threats they pose to the success of North American wetlands restoration efforts using native wetland species.

AERF supports research for the control of aquatic weed species and exotic plants.

Campaign to preserve California's coastal biological resources through the elimination of introduced species of Spartina.

Weed Warriors preserve biodiversity and protect water resources by controlling alien invading plants in national parks in South Africa such as Kruger National Park.