Figure 1.

Selection rate coefficients for Staphylococcus epidermidis invading populations of S. aureus (SH1000). Toxin-producing S. epidermidis isolates (155 and 180) and nonproducing isolates (035 and 115) were invaded into populations of S. aureus (SH1000) at relative frequencies of 10, 100 and 1000. Each of the invasions was also carried out under a spatially structured treatment and a mixed treatment. Asterisks mark negative selection rate coefficients where invasion did not occur. Error bars represent the standard error of the mean.