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Table 4 Rankings and relative support for models that quantify the role of microrefuges in pika occurrence during the period in which green vegetation was available (1 June – 30 September)

From: Microrefuges and the occurrence of thermal specialists: implications for wildlife persistence amidst changing temperatures

Model K AICc Δ AICc Wj Ej
Subsurface microrefuge (magnitude) 2 45.57 0.00 0.75 n/a
Interstitial temperature (variation) 2 48.95 3.38 0.14 5.36
Interstitial temperature (magnitude) 2 51.78 6.22 0.03 25.00
Subsurface microrefuge (variation) 2 52.51 6.94 0.02 37.50
Local habitat - Cos(Aspect) 2 52.89 7.32 0.02 37.50
Surface temperature (variation) 2 52.91 7.34 0.02 37.50
Surface temperature (magnitude) 3 54.23 8.66 0.01 75.00
Local habitat - Slope + Elevation + Cos(Aspect) 4 55.81 10.24 0.00 undefined
  1. Model-selection parameters from competing models used to examine the effects of microrefuges and surface temperatures on American pika (Ochotona princeps) occurrence in western Wyoming, USA, 1 June – 30 September; K, number of parameters in the model; AICc, Akaike Information Criterion corrected for small samples; Δ AICc, difference for model relative to the smallest AICc in the model set; Wj, Akaike weight is the approximate probability in favor of the given model from the set of models considered; Ej represents the weight of evidence in support of a model, compared to the top ranked model (WjTop/Wji)