Invasion
Invasion Description
1st Record: San Diego/CA/Quivera Basin, Mission Bay (1959, Stewart 1991)
Geographic Extent
Point Concepcion /CA/Pacific Ocean (2004, Maloney et al. 2006); Arroyo Hondo/CA/Pacific Ocean (2004, Maloney et al. 2006); Santa Barbara/CA/Pacific Ocean (1977, Cohen 2005); Santa Cruz Island/CA/Pacific Ocean (1988, Cohen 2005); Blue Cavern Onshore State Marine Conservation Area, Santa Catlaina Island/CA/Sotuhern California Bight (Looby and Ginsburg 2021); Anacapa Island/CA/Pacific Ocean (1989, Cohen 2005); Los Angeles/CA/Pacific Ocean (1973, Norton 1981); Oxnard/CA/Port Hueneme (2011, California Department of Fish and Wildlife 2014); Point Fermin, Los Angeles/CA/Pacific Ocean (2004, Maloney et al. 2006); Los Angeles/Long Beach harbors/CA/ (1977, Cohen 2005); Pilot's Dock and Impound Marina, Long Beach/CA/Long Beach Harbor (2000, Cohen et al. 2002); Newport Beach/CA/Newport Bay (2011, California Department of Fish and Wildlife 2014; Smith 2016); Santa Catalina,San Nicolas, San Clemente Islands/CA/Pacfiic Ocean (1970, Norton 1981, Cohen 2005); Pin Rock, Santa Catalina Island/CA/Pacfiic Ocean (2004, Maloney et al. 2006); Santa Catalina Island/CA/Avalon Harbor (2011, California Department of Fish and Wildlife 2014); Orange County/CA/Pacific Ocean (1971, Cohen 2005); Dana Point, Orange County/CA/Pacific Ocean (2004, Maloney et al. 2006); Oceanside/CA/Oceanside Harbor (2011, California Department of Fish and Wildlife 2014); La Jolla/CA/Pacific Ocean (Gunnill et al. 1985; San Diego/CA/Quivera Basin, Mission Bay (1959, Stewart 1991; 2011, California Department of Fish and Wildlife 2014); oint La Jolla/CA/Pacific Ocean (1970, Gunnill 1985; 2004, Maloney et al. 2006); San Diego/CA/Mission Bay (1959, Cohen 2005); San Diego/CA/San Diego Bay (1969, Deysher and Norton 1982, cited by Stewart 1991; Cohen 2005; 2011, California Department of Fish and Wildlife 2014); San Diego /CA/Fiddler's Cove, San Diego Bay (2000, Cohen et al. 2002); Point Loma, San Diego/CA/Pacific Ocean (2004, Maloney et al. 2006); Punta Banda, Baja California/Mexico/Pacific Ocean (1973, Norton 1981, Espinosa 1990; Cohen 2005); 'Raul's'/Baja California/Mexico/Pacific Ocean (1988, Aguilar-Rosas and Galindo 1990, 32 20N, 117 20W); Punto Morro, Baja California/Mexico/Pacific Ocean (1988, Aguilar-Rosas and Galindo 1990, 31 13N, 116 40W); Islas Los Coronados, Baja California/Mexico/Pacific Ocean (1973, Norton 1981, Espinosa 1990; Cohen 2005) Punta Asunción, Baja California/Mexico/Pacific Ocean (1988, Espinosa 1990; Cohen 2005); Baja California/Mexico/Bahia Tortugas (1987, Espinosa 1990; Cohen 2005); Punta Abreojos, Baja California/Mexico/Pacific Ocean (1984, Espinosa 1990; Cohen 2005); Guadalupe Island, Baja California Sur/Mexico/Pacific Ocean (Aguilar-Rosas et al. 2014)
Vectors
| Level | Vector |
|---|---|
| Alternate | Natural Dispersal |
| Alternate | Hull Fouling |
| Alternate | Ballast Water |
Regional Impacts
| Ecological Impact | Competition | |
| Sargassum muticum colonized Giant Kelp (Macrocystis pyrifera) beds on Bird Rock, off Catalina Island, after a die-off, possibly caused by high water temperatures during El Nino. Shading by Sargassum muticum probably inhibited recolonization by the kelp. After experimental removal, the kelp recolonized the cleared areas (Ambrose and Nelson 1982). Several years later, Giant Kelp did recolonize Bird Rock (Foster & Schiel 1992, cited by Engelen et al. 2015). Removal experiments in tidepools at Little Corona del Mar in Newport Beach in southern California, showed little effect level, pool temperature, seaweed biomass and community composition, or faunal composition. Recovery of S. muticum populations was rapid (Smith 2016). | ||