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Table 4 Factors affecting the probability of nest abandonment by parakeets between 2014 and 2015. Estimates and 95% confidence intervals (2.5 and 97.5%) were assessed after model averaging (ΔAIC ≤2). We considered that a given variable has no, weak or strong support when the 95% confidence interval strongly overlapped zero, barely overlapped zero (*), or did not overlap zero (**), respectively. Models were run separately for 2014 and 2015. k: number of parameters. AICc: Akaike Information Criterion corrected for small sample sizes. ΔAICc: difference between the AICc of model i and that of the best-supported model (i.e. the model with the lowest AICc); w: Akaike weights. R2: measure of how well the model explains the data

From: A protective nesting association with native species counteracts biotic resistance for the spread of an invasive parakeet from urban into rural habitats

ModelkAICcΔAICcweightVariablesEstimate2.5%97.5% 
abandon stork + conspecific density331.8800.37abandon stork3.830.826.85**
abandon stork232.951.070.22conspecific density−1.03−2.310.25*
abandon stork + substrate333.011.130.21substrate (pylon)1.81−0.814.43*
abandon stork + predation risk333.231.350.19predation risk−0.87−2.200.47*
predation risk + conspecific density341.399.520.00     
Null141.429.550.00     
conspecific density + substrate342.1910.320.00     
Substrate242.8911.020.00     
predation risk242.9511.080.00     
conspecific density242.9611.080.00     
predation risk + conspecific density + substrate443.4311.560.00     
predation risk + substrate345.2713.390.00     
  1. R2 = 0.45