This article was mistakenly published without acknowledging the hard work and diligence of the Plymouth Marine Laboratory and Western Channel Observatory staff in collecting samples and data associated with this study.
Competing interests
No Competing Interests - I am however a co-author on the manuscript.
Update to the acknowledgements
29 May 2012
This article was mistakenly published without acknowledging the hard work and diligence of the Plymouth Marine Laboratory and Western Channel Observatory staff in collecting samples and data associated with this study.
Competing interests
No Competing Interests - I am however a co-author on the manuscript.