Figure 3:

The results from scenarios incorporating a temporary (1 year) increase in the stress experienced by each population. (a) The impacts on the size of the populations by the increase in stress. Group designations are the same as in Fig. 2a. (b and c) The impact on physical condition and age due to the increase in stress during the following 4 years: the baseline (prior to the increase in stress) for each population; the year during which stress was increased; the year directly following the increase (in which the stress levels from before the increase were restored); and the year 10 years after the restoration of the original stress levels. In both (b) and (c), group designations are the same as in Fig. 2a. (d) The impact on population sizes caused by the temporary increase in stress combined with the re-assortment of individual stress levels. Again, group designations are the same as in Fig. 2a. To enable direct comparison, all populations in all models began at the same size.