Aquatic Ecosystem Restoration Foundation - AERF supports research for the control of aquatic weed species and exotic plants. San Francisco Estuary Invasive Spartina Project - Campaign to preserve California's coastal biological resources through the elimination of introduced species of Spartina. Aquatic Plant Management Society - This international organization is a respected source of expertise in the field of biological, mechanical, and chemical aquatic plant management and aquatic plant species. Killer Algae - Caulerpa taxifolia, once a harmless aquarium plant, is carpeting the Mediterranean, choking out all other aquatic plants. Purple Loosestrife in Michigan - Information on this wetland plant, its arrival in North America, distribution, ecological effects and control measures. Noxious, Invasive, and Alien Plant Species - Discusses different categories of problem species and the threats they pose to the success of North American wetlands restoration efforts using native wetland species.