Figure 2
Seasonal trend in temperature and a visualisation of the prevailing weather model. (A) Seasonal trend in mean temperature fitted (5th order spline) for low (~100 m a.s.l.) and high (~400 m a.s.l.) elevations in 2011 and 2012 in county Møre & Romsdal, Norway. (B) Seasonal trends in questing density of Ixodes ricinus ticks at high and low elevations in Møre & Romsdal county, Norway, for both years combined after controlling for the prevailing weather. The trend was based on the model from Tables 2 &3. Temperature was set to the estimated peak (17.3°C), and the intercept was the unadjusted estimate from the fixed effects. (C) Abundance of questing ticks per 20 m2 as an effect of temperature after controlling for the year and time trend effect. Points are median density of questing ticks per 20 m2 of flagging per transect/bi-weekly flagging session. The best model included a 2nd order term for temperature, but a linear temperature effect is also included for comparison. The intercept is set to 2011, low elevation.