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Table 5 Summary statistics for linear mixed models of environmental influences on residency time for black-legged kittiwake (Rissa tridactyla) in each ecoregion

From: Wintering North Pacific black-legged kittiwakes balance spatial flexibility and consistency

  df AIC ΔAIC R2 (m) R2 (c)
Bering Sea
 Full model 13 5504 7 0.005 0.149
 d2ed + EKE + d2hill + wind 8 5497 - 0.004 0.150
Subarctic Gyre (West)
 Full model 13 13051 8 0.019 0.098
 SST + d2ed + wind 7 13043 - 0.019 0.098
Subarctic Gyre (East)
 Full model 13 6129 10 0.028 0.071
 SST + d2hill 6 6119 - 0.028 0.071
Polar Front
 Full model 13 8765 7 0.005 0.078
 d2ed + d2hill + chla 7 8757 - 0.004 0.076
  1. All models include a temporal correlation term (corCAR1(form = ~date|id)). Summary statistics of each full model (SST + depth + d2ed + slopetrn + EKE + ssh + d2hill + wind + chla) are presented first, followed by the best-fit model for each ecoregion. Akaike Information Criterion (AIC) were used to identify the best-fit model and marginal R2 (R2 (m)) and conditional R2 (R2 (c)) are presented. Abbreviations for the environmental variables used in the table are: sea-surface temperature (SST), distance to mesoscale eddy center (d2ed), sea-surface height (SSH), eddy kinetic energy (EKE), distance to productive seamounts and knolls (d2hill), monthly chlorophyll a (chla), bathymetric slope (slope) and bathymetry (bathy)