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Table 2 Model selection procedure with the climate variables and year as predictors and the total questing tick density as the response

From: Temporal pattern of questing tick Ixodes ricinus density at differing elevations in the coastal region of western Norway

Year Relative humidity (RH) Vapour pressure deficit (VPD) Temperature Vegetation height (RH/VPD)2 (Temperature)2 (RH/VPD)* Temperature (RH/VPD)* (Temperature)2 (RH/VPD)2* Temperature (RH/VPD)2* (Temperature)2 Elevation category date ns (date, df = 2) Elevation category*date AIC ∆ AIC
X X   X X X X X X X X      5966.4 127.8
X   X X X X X X X X X      5971.3 132.7
X   X X   X X X X X X      5965.4 126.8
X X   X X X X X X X       5964.5 125.9
X X   X X X X X X   X      5964.5 125.9
X X   X X X X X   X X      5964.5 125.9
X X   X X X X   X X X      5964.7 126.1
X X   X   X X X X X       5963.4 124.8
X X   X   X X X X   X      5964.5 125.9
X X   X   X X X   X X      5963.5 124.9
X X   X   X X   X X X      5963.7 125.1
X X   X   X X X X        5965.2 126.6
X X   X   X X X   X       5969.0 130.4
X X   X   X X   X X       5967.0 128.4
X X   X   X X X         5967.0 128.4
X X   X   X X   X        5966.1 127.5
X X   X   X X          5965.5 126.9
X X   X   X           5983.5 144.9
X X   X    X          5964.9 126.3
X X   X             5980.9 142.3
X X               5983.5 144.9
X    X    X          5993.6 155
  X   X    X          5988.9 150.3
X X   X    X      X   X X 5840.3 1.7
X X   X    X      X X   X 5882.7 44.1
X X   X    X      X   X   5874.3 35.7
X X   X    X      X X    5880.9 42.3
X X   X         X   X X 5848.1 9.5
X    X    X      X   X X 5838.6 0
  X   X    X      X   X X 5848.1 9.5
X X           X   X X 5849.4 10.8
  1. X = term included; AIC = Akaike’s information criterion; ∆ AIC = the difference in AIC value between the given model and the model with the lowest AIC; * = interaction term, and all other variables are additive. Note that in the interactions, the term (RH/VPD) means either relative humidity or vapour pressure deficit, depending on which variable was included as the linear effect.
  2. Bold face indicates the best prevailing weather model.