Aquatic Invasions (2011) Volume 6, Issue 1: 17–31 doi: 10.3391/ai.2011.6.1.03 Open Access © 2011 The Author(s). Journal compilation © 2011 REABIC Research Article Alien species of Bugula (Bryozoa) along the Atlantic coasts of Europe John S. Ryland1*, John D.D. Bishop2, Hans De Blauwe3, Aliya El Nagar2, Dan Minchin4, Christine A. Wood2 and Anna L.E. Yunnie2 1Department of Pure and Applied Ecology, Swansea University, Swansea SA2 8PP, UK 2Marine Biological Association of the UK, The Laboratory, Citadel Hill, Plymouth PL1 2PB, UK 3Watergang 6, 8380 Dudzele, Belgium 4Marine Organism Investigations, Ballina, Killaloe, Co. Clare, Ireland E-mail:
[email protected] (JSR),
[email protected] (JDDB),
[email protected] (HDeB),
[email protected] (AEN),
[email protected] (DM),
[email protected] (CAW),
[email protected] (ALEY) *Corresponding author Received: 22 June 2010 / Accepted: 9 November 2010 / Published online: 9 December 2010 Abstract Three apparently non-native species of Bugula occur in marinas and harbours in Atlantic Europe. The most common, B. neritina, was known from a few sites in southern Britain and northern France during the 20th century, following its discovery at Plymouth by 1911. During the 1950-60s it was abundant in a dock heated by power station effluent at Swansea, south Wales, where it flourished until the late 1960s, while water temperatures were 7-10°C above ambient. It disappeared after power generation ceased, when summer temperatures probably became insufficient to support breeding. Details of disappearances have not been recorded but B. neritina was not seen in Britain between c1970 and 1999.