Figure 2.

Relationship between artificial nest predation rate and the growth rate of Dupont's lark local populations. Although population size was analysed as a continuous variable (table 1), the populations were separated into small (less than 25 occupied territories) and large (greater than or equal to 25 occupied territories) ones for simplicity. The linear regressions illustrate the differential effect of nest predation on λ for the two types of patches. Filled circles, small populations; open circles, large populations.