Table 2 Ranking of causal factors.
Causal factors | Mean | count | Statistically different? |
|---|---|---|---|
Population size | 4.44 | 109 | *** |
Climatic factors | 3.20 | 87 | ns |
Social advantage(s) | 3.19 | 77 | ns |
Inbreeding | 3.12 | 49 | ns |
Stochasticity | 3.03 | 34 | ns |
Epidemics | 2.76 | 19 | ns |
Allee effects | 2.74 | 26 | ns |
Economic advantage(s) | 2.63 | 46 | ns |
Technological advantage(s) | 2.60 | 63 | *** |
Cognitive advantage(s) | 2.19 | 39 | *** |
Morphological advantage(s) | 1.51 | 25 |