Caulerpa taxifolia est une espèce d’algues vertes pérennes de type nématothalle d'origine tropicale appartenant aux Ulvophyceae à structure siphonée. All identified Caulerpa patches were covered with impermeable 35mil PVC liners. Eradication and Surveillance of Caulerpa taxifolia within Agua Hedionda Lagoon, Carlsbad, California Fifth Year Status Report (2005). It grows more rapidly, tolerates cooler water, and grows at greater depth than the native species. In U.S. waters, the Mediterranean strain of Caulerpa taxifolia is listed as a federal noxious weed, under the Plant Protection Act. Any sightings should be immediately reported to the California Department of Fish & Wildlife at 858-627-3985 (, or NOAA Fisheries at 562-980-4037 ( It created ecological and economic devastation by overgrowing and eliminating native sea grasses, reefs, and other native communities. Caulerpa Taxifolia Algae is very hardy species that is extremely easy to care for in an aquarium or sump environment. Internet Explorer lacks support for the features of this website. Additional comments The invasive strain of Caulerpa taxifolia is genetically distinct from the noninvasive form. This invasive weed was discovered in southern California and New South Wales, Australia in 2000. It does this by either out-competing species for food and light or due to the toxic effects of its caulerpenyne compounds. The aquarium strain of Caulerpa taxifolia is an extremely invasive seaweed that has infested tens of thousands of acres in the Mediterranean Sea. It is one of the world's 100 worst invasive species. Description: Caulerpa taxifolia is bright green, with feathery, fern-like fronds that extend upward from a main stem. In the Mediterranean Sea, caulerpa has infested thousands of acres of seafloor. Chlorine was poured under the sealed tarpaulins which trapped the chlorine. Sexual reproduction has not been observed in the aquarium strain of Caulerpa taxifolia. Caulerpa taxifolia, an invasive species elsewhere in the world, is native to Moreton Bay where its distribution has been increasing in recent years. Most hobbyists keep this species in sumps or vegetable filters in order to keep nitrates low and the resulting nuisance algae out of their main display aquarium. The Situation: Caulerpa taxifolia is an invasive alga that is causing serious environmental problems in the Mediterranean Sea. The invasive strain of Caulerpacan tolerate low sea water temperatures and can survive out of water, in moist conditions, for up to 10 days. Caulerpa taxifolia is an invasive marine alga that is often referred to as "Killer Algae". Summary of Invasiveness. Riverside, CA 92521, CNAS Dean's Office Caulerpa racemosais invading much faster than Caulerpa taxifolia. Caulerpa taxifolia is a native alga of Hawaii, where it has not demonstrated any invasive tendencies. La souche tropicale est présente naturellement au sud de l'Australie, en Amérique centrale et sur les côtes africaines. Elle est présente naturellement dans l'Indo-Pacifique, les Caraïbes et sur les côtes africaines atlantiques tropicales. Ecological Risks: Plant and animal diversity and abundance are reduced where Caulerpa taxifolia has invaded. 2001) Date of U.S. Introduction: The invasive strain of Caulerpa taxifolia, by spreading over large areas, competes with native species such as sea grass. Key words: Caulerpa taxifolia, invasive species, sexual reproduction, monoecy, gender expression, reproductive ecology Introduction Many species of macroalgae combine various modes of asexual and sexual reproduction in their life histories, but the relative importance of these reproductive modes, which may vary widely between and within species, remains poorly investi-gated. tomentosoides, Caulerpa taxifolia, Undaria pinnatifida, Asparagopsis armata and Grateloupia doryphora, while Sargassum muticum ranked … This approach also prevents fragmentation of dying plants from spreading viable fragments to adjacent areas. 2003. About Us; Contact Us; Navigation. The alga has a stem (rhizome just above the seafloor. … Species Survival Commission. When first detected the populations of Caulerpa in southern California were small enough for eradication to be feasible. 1998; Meusnier et al. That initial methodology was modified to treat contained patches with a solid form of chlorine. Columbia University. This invasive weed was discovered in southern California and New South Wales, Australia in 2000.  Caulerpa taxifolia was officially eradicated from southern California in 2006. Natural Control: Outside the tropics where Caulerpa occurs naturally, there is no known marine life that eats Caulerpa taxifolia in any significant qualities. Geology Building, Room 2258 Caulerpa taxifolia was officially eradicated from southern California in 2006. Small fragments can get caught up in fishing gear, diving equipment and boats and then grow into new plants and create large colonies. Aquarium water should be disposed of only in a sink or toilet. Caulerpa taxifolia was officially eradicated from southern California in 2006. The aquarium strain of Caulerpa taxifolia is an extremely invasive seaweed. To eradicate underwater populations of Caulpera, patches were covered with tarpaulins which were held down with sandbags which sealed the edges. Depth: Caulerpa taxifolia can grow in shallow coastal lagoons as well as in deeper ocean waters, possibly to depths of greater than 150 feet (nearly 50 meters). In July 2000, another infestation was reported in a portion of Huntington Harbor in Orange County. California's Reaction to Caulerpa taxifolia: A model for invasive species rapid response actions. is an invasive marine alga that is widely used as a decorative plant in aquaria. MappingCaulerpa racemosa's expansion is difficult due to its ability to invade deeper areas rarely visited by free-divers and to its less noticable size and colour. Due to its fast-growing hardy nature, and attractive appearance, Caulerpa taxifolia is used as decorative saltwater aquarium plant. Chlorine in this instance acted as a pesticide and killed living organisms trapped under the tarpaulins, including Caulerpa. Its growth pattern was similar to that observed in the Mediterranean Sea, having spread to many areas and displaced the native seagrass. Signed into law in 2001, the Assembly Bill 1334 (Harman), prohibits the possession, sale, and transport of Caulerpa taxifolia throughout California. Rejetée comme un déchet1, elle y est devenue une espèce envahissa… This bill also establishes the same restrictions on several other species of the genus Caulerpa that are similar in appearance and are believed to have the ability to become invasive. In other areas where it has invaded, Caulerpa taxifolia has replaced large areas of seagrass and fish populations are reduced, as fish do not generally eat it.
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