Table 1.
Parameter values used in the four simulation scenarios presented in this analysis.
| Parameter | Pure niche conservatism | Energy gradient | Speciation gradient | Disturbance gradient | Units |
|---|---|---|---|---|---|
| Environmental gradient | 0–40 | 0–40 | 0–40 | 0–40 | °C |
| Strength of niche conservatism, σE | 1 | 1 | 1 | 1 | °C, SD units |
| Regional carrying capacity, Kmax | 40,000 | 4,000–40,000 | 22,000 | 22,000 | Individuals |
| Per individual speciation probability | 10-6 | 10-6 | 3.2 × 10-7 to 3.2 × 10-6 | 10-6 | Probability |
| Disturbance magnitude | 0 | 0 | 0 | 99–75 | % of individuals killed per event |
Values that are listed as a range refer to the values at the temperate and tropical ends of the spatial gradient, respectively, and all gradients were linear.