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Table 2 Results of the six model selection procedures at different time scales

From: Influence of climatic factors on Ixodes ricinus nymph abundance and phenology over a long-term monthly observation in Switzerland (2000–2014)

Climatic variable Field measure Daily mean (weather station) 5 day MA 10 day MA 17 day MA 30 day MA
Ns (date, df = 6) × × × × × ×
T × × × × × ×
T2 × × × × × ×
RH × × ×* ×* ×*  
RH2 ×*    ×*   
PR NT NT     
PR2 NT NT     
AIC 1047.5 1047.7 1049.2 1054.9 1060.9 1085.0
∆AIC 0 0.2 1.7 7.4 13.4 37.5
  1. Notes: Each column (starting from column 2) represents a model in which nymph density (nb/100 m2) was the response variable (n = 173), and the explanatory variables used in the full model are listed in the first column, i.e. temperature (T), relative humidity (RH), and precipitations (PR), with their respective quadratic terms. Crossed = term included in the model after backward stepwise selection based on Akaike Information Criterion (AIC). AIC and ∆AIC (difference with the model with the lowest AIC). Terms included (×) were statistically significant in their respective model output. Terms noted with an asterisk (×*) indicate a trend (P < 0.1) in the model output. Precipitations were not considered in the 2 first models (NT, not tested) due to biases induced by the arbitrary choice to sample nymph only during dry days. PR was not found to be significant in any of the tested models