Table 12.1
(continued)
GLMM
AIC
Model comparison
Interaction terms
Full model
Null model
Dev
df
p
Contrast
Coef
SE
p
Spatial distribution
b
2078
2088
22.00
6
<0.01
All interaction terms with p
> 0.05
Dunlin activity
a
309
349
46.66
3
<0.001
All interaction terms with p
> 0.05
For each parameter tested, we present the comparison between a full model including all main effects and their interactions, and the corresponding null model
including only the main effects. In each case we present the AIC of the full and null models, the results of the analysis of deviance comparing the null and the
full models, and the coefficients, standard errors, and p
value estimates of the interaction terms. Estimates of the interactions are presented only when the full
model was significantly superior to the null model, and when at least one interaction term was statistically significant (p < 0.05)
a
The interaction tested was year
 type of saltpan
b
The interaction tested was (year
 type of saltpan)
 type of pond
12 Evaluating the Impacts of a New Railway on Shorebirds …
207