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Proc. R. Soc. B 280, 20122003 (7 March 2013; Published online 16 January 2013). (doi:10.1098/rspb.2012.2003)
The author affiliation for R. Andrew Goodwin was incorrectly listed. This co-author's correct affiliation is the Environmental Laboratory, U.S. Army Engineer Research and Development Center, Portland, OR 97208, USA
