Assessing the extent of establishment of Undaria pinnatifida in Plymouth Sound Special Area of Conservation, UK

Heiser, Sabrina; Hall-Spencer, Jason M.; Hiscock, Keith. 2014 Assessing the extent of establishment of Undaria pinnatifida in Plymouth Sound Special Area of Conservation, UK. Marine Biodiversity Records, 7, e93. 8, pp. 10.1017/S1755267214000608

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Abstract/Summary

The north-west Pacific kelp, Undaria pinnatifida, was first discovered in Europe on the Mediterranean coast of France (1971) and introduced to Brittany for aquaculture (1983). In the north-east Atlantic, it occurs in Spain, France, the British Isles, Belgium and Holland. The first UK record was in the Hamble estuary (1994) and it was found off Plymouth in 2003. The UK distribution is presently restricted to the south of England and the northern Irish Sea. We assessed the distribution of U. pinnatifida and native kelps and their allies in Plymouth Sound (at 0 to +1 m relative to Chart Datum). Undaria pinnatifida was widespread along rocky shores, on other hard substrata and grew in the same areas as Saccharina latissima and Saccorhiza polyschides. Undaria pinnatifida was significantly more abundant on vertical substrata than on upward-facing hard substrata. It was almost as common as all of the other kelp species combined on vertical substrata but was outnumbered by native species on upward-facing substrata. Undaria pinnatifida has become the visually dominant macroalga in marinas and has spread to surrounding natural habitats in Plymouth Sound. The extent to which it will outcompete native kelps requires monitoring, especially in conservation areas.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1017/S1755267214000608
Programmes:	BAS Programmes > Polar Science for Planet Earth (2009 - ) > Ecosystems
ISSN:	1755-2672
Additional Keywords:	Undaria pinnatifida, non-native, invasions, establishment, Plymouth Sound, orientation, spread
Date made live:	24 Feb 2015 14:31 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/509872

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