Rapid assessment of marine non-native species in the Shetland Islands, Scotland

Samuel B. Collin, Jacqueline F. Tweddle, Rachel J. Shucksmith

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18 Citations (Scopus)
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The Shetland Islands, northern Scotland, have a highly active and diverse maritime environment, and local marine industries form an important part of the local economy. The potential for damage caused by non-native species is high. As part of an assessment of the current status of non-native species in Shetland, a series of rapid assessment surveys, coupled with a settlement panel monitoring programme, were carried out at 18 sites between May 2012 and October 2014. Eight non-native species were detected in our surveys, three of which (Corella eumyota Traustedt, 1882; Bugulina simplex Hincks, 1886; and Dasysiphonia japonica (Yendo) Kim, 2012) had not been previously recorded. Observations by SCUBA also reported the first UK record of Schizoporella japonica Ortmann, 1890 growing on natural substrate. A literature review revealed three additional non-native species that have been documented in Shetland but were not detected in our survey work. The results from this study highlight the speed at which non-native species can spread over regional scales, and that more active harbours contain greater numbers of non-native species, indicating the potential of hull fouling and ballast water exchange for transporting non-native species.
Original languageEnglish
Pages (from-to)147-155
Number of pages9
JournalBioInvasions Records
Issue number3
Early online date2 Jun 2015
Publication statusPublished - Aug 2015

Bibliographical note

We would like to thank Marine Scotland for their continued
financial support, and also the financial support of the Shetland
Oil Terminal Environmental Advisory Group (SOTEAG). We
would also like to thank Dr. Joanne S. Porter and Dr. Belinda
Baldock for their contribution of personal records of non-native
species, as outlined in this manuscript, and for their assistance
with identifying a number of the NNS described. We wish to
thank Dr. Richard Shelmerdine, Kristen Saunders, Chis Nall, and
Leanna Henderson for their assistance with data collection, and
also the marina operators, Lerwick Port Authority, and Shetland
Islands Council for granting access to sites for surveying and
monitoring. We would like to thank the two anonymous reviewers
for their feedback on the manuscript.


  • invasive
  • United Kingdom
  • survey
  • tunicate
  • bryzoan
  • alga


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