Table 2.
Parameters of the SPOM model, their meaning and the values, or range of values, assigned.
| parameters | interpretation | value(s) |
|---|---|---|
| ξim | effect of patch quality on immigration (preference for high-quality habitat) | 0, 0.5 |
| ξem | effect of population size on emigration | 0.5 |
| D | inverse of mean dispersal distance | 2 (lattice), 5 (full) |
| dij | distance between patch i and j | 1∀i,j neighbours (lattice) |
| 1∀i≠j (full) | ||
| μ | extinction rate of unit quality patch | 0.1 |
| ν | infectious survival | 0.1–1 |
| α | strength of environmental stochasticity | 1 |
| δ | probability of direct infection | 0–0.9 |
| γ0 | initial rate of infection from reservoir patch | 0.5 |
| β | pathogen longevity (half-life in environment, relative to 1/μ) | 0.3–3 |