Fig. 2. Dynamics of a fivespecies community described by a symmetrical interaction network such that S_{1} > S_{2}, S_{3}; S_{2} > S_{3}, S_{4}; … ; S_{5} > S_{1}, S_{2} where “>” indicates overgrowth. Initially all species have identical growth rates, and the likelihood of a species S_{i} overgrowing S_{j} (as defined by the interaction matrix) is unity. However, at 500 generations a shift in the “environment” is introduced. In (A) the growth rate of S_{5} drops to 75% of that of S_{1}S_{4}, whereas in (B) growth rates are unaffected but the interaction between S_{1} and S_{2} becomes reversible such that S_{1} wins in 60% of cases whereas S_{2} wins in 40% of cases. S_{1} = light blue; S_{2} = yellow; S_{3} = red; S_{4} = dark blue; S_{5} = green. Bold lines (green in A, light blue in B) indicate species analyzed to estimate CLSs (see Figs. 3, 4).
