Sargassum muticum in Ireland

Species name:Sargassum muticum
Common names:
Synonymes:Sargassum kjellmanianum
Habitats:Marine habitats, Estuaries and brackish areas, Coastland
Time of introduction:1995
Year of first report:1995
Type of introduction:Unintentional
Distribution details:Northwest Pacific, coastal waters of Japan, China, Russia and Korea
Donor area:
Impact:Competition, Abiotic changes, Socio-economic
Comments:First reported in Northern Ireland in 1995 and then in the Rep. of Ireland in 2001. Hull fouling and/or aquaculture is the suspected pathways.This species was one of eight identified as 'posing most threat to the attainment of the environmental quality ob
Last updated09-05-2011 (day-month-year)
Resources: Fact sheet Google image search
  • Boaden, P. J. S. (1995). The adventive seaweed Sargassum muticum (Yendo) Fensholt in Strangford Lough, Northern Ireland. Irish Naturalists Journal. Vol.25.(3): 111
  • Guiry, M. 2009. Sargassum muticum Wireweed. Algaebase. Available online: [Accessed 23/10/2009]
  • Invasive Species Ireland. Most Unwanted. Available online: [Accessed on: 23/03/2009]
  • Invasive Species Ireland. Risk Assessment (December 2007). Available for online for download: [Accessed on: 23/03/2009]
  • Josefsson, M. and Jansson, K. (2006): NOBANIS – Invasive Alien Species Fact Sheet – Sargassum muticum. – From: Online Database of the North European and Baltic Network on Invasive Alien Species – NOBANIS [Accessed 23/10/2009]
  • Kraan, S. (2008). Sargassum muticum (Yendo) Fensholt in Ireland: an invasive species on the move. Journal ofApplied Phycology. 20:825–832
  • Loughnane, C. Stengel, D. B. (2002). Attached Sargassum muticum (Yendo) Fensholt found on the west coast of Ireland. Irish Naturalists Journal. Vol.27.(2): 70-72
  • National Biodiversity Data Centre. National Invasive Species Database. Available online: [Accessed: 2009]
  • Strong, J.A., Dring, M.J. and Maggs, C.A. (2006). Colonisation and modification of soft substratum habitats by the invasive macroalga Sargassum muticum. Mar Ecol Prog Ser 321: 87–97.
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