Table 2 Linear mixed-effects model of daily ODBA.

From: Ecological Responses to Extreme Flooding Events: A Case Study with a Reintroduced Bird

Variable Coefficient Lower 95% CI Upper 95% CI P- value
Intercept 46.02 43.63 48.41 <0.001
Flood Extent −1.27 −2.28 −0.27 0.0134
Flood Extent2 −1.47 −2.61 −0.35 0.0104
Julian Date 3.59 3.062 4.13 <0.001
Winter −1.34 −6.041 3.42 0.53
Winter × Flood Extent 2.41 0.99 3.82 <0.001
Winter × Flood Extent2 2.48 0.91 4.061 0.002
Corr. struct: J. Date/Winter 0.057 0.018 0.18 NA
Var. function: 2nd Winter 1.19 1.10 1.29 NA
Bird ID Random Effect σ = 2.89 1.74 4.82 NA
Week ID Random Effect σ = 2.49 2.011 3.091 NA
  1. Random effects here represent among individual standard deviation in intercepts. Note that a p value cannot be calculated for the temporal autocorrelation structure (Corr. struct). Model selections was performed using K-fold cross validation where K = 5, including as predictors the daily extent of flooding, the Julian date in the winter, and winter. As random effects in the model we included bird ID and week. N = 1469 observations taken across two years. Number of weeks = 44. Number of birds = 11.