Appendix E (TABLE E1). Model selection summary for analysis of change in cordgrass biomass over experiment (i) and size of indirect predator effect on cordgrass (ii). Fitted parameters include (a) intercept of 1, (b) tidal regime, (c) identity of predator and its cue, as well as (d) presence of any predator or predator cue. AIC difference (Δ_{i}) is the difference between the AIC_{c} of model i and the lowest AIC_{c} observed. Akaike weight (w_{i}) is calculated as the model likelihood, exp(-Δ_{i} / 2), normalized by the sum of all model likelihoods; values close to 1 indicate greater confidence in the selection of a model.
(i) Change in biomass of cordgrass |
df | (Δ_{i}) | w_{i} |
a | 3 | 22.6 | < 0.001 |
b | 4 | 16.3 | < 0.001 |
c | 10 | 16.3 | < 0.001 |
b + c | 11 | 10.7 | 0.005 |
b × c | 18 | 0.0 | 0.995 |
(ii) Size of indirect predator effect |
|||
a | 3 | 7.8 | 0.01 |
b | 4 | 0.0 | 0.54 |
c | 8 | 9.2 | 0.005 |
b + c | 9 | 2.3 | 0.17 |
b × c | 14 | 1.4 | 0.27 |