Correction for Phylogenetic relatedness predicts priority effects in nectar yeast communities

Proc. R. Soc. B 279, 749–758 (25 September 2012; Published online 20 July 2011) (doi:10.1098/rspb.2011.1230)

On page 753, the formula for the invasion score metric used to measure the relative strength of priority effects is given incorrectly.

The correct formula should be (y_i – μ_x)/σ_p.

The following textual description of the formula and its interpretation are correct as are the calculated values shown in figure 4.