Table 2.
Expected success of biogeographic models based on similarity of the environment for which the model was developed and the new environment for which predictions are being made
| Environment comparison | Model success |
|---|---|
| Environ variance >> LTmax, both environments | Success |
| TEM = 0, both environments | Success |
| TEM >> 0 in one but not both environments | Failure likely1 |
| TEM >> 0 in both environments, but environ variance < LTmax in at least one environment | Failure likely1 |
“Environ variance” is environmental variance.
1
Failure can occur in at least three divergent ways due to differences between the two environments: negative SFG, lethal temperature, change in mechanism. See text.