Table 1 The relationship between statistical density dependence in prey time series and the combination of ecological interaction coefficients.
From: Predation and fragmentation portrayed in the statistical structure of prey time series
Statistical density dependence | Ecological interaction coefficients | Ecological interpretation | ||
|---|---|---|---|---|
| Â | predator (a jj = a ji = 0) | + | predatora | Â |
Direct: (1+b1) | 2+a ii | < | 2+a ii + a jj | Stronger competition among non-predated than predated vole populations [8, 9] |
Delayed: b2 | -a ii - 1 | > | a ji a ij -a jj a ii - a ii - a jj -1 | Predation of voles and increased feed-back from voles to predators [9, 10] |