Fig. 7
Effect of year on the density of nymphs (DON) is shown for the four elevation sites: (a) low site, (b) medium site, (c) high site, and (d) top site. The DON is an estimate of the number of questing I. ricinus nymphs per 100 m2 sampled by the dragging method each month. Years 1 and 14 refer to years 2004 and 2017, respectively. The predicted values were calculated using model 2 in Table 5. The reference conditions were as follows: season = Spring, BM[2,1]  = 1, calendar day = 15 April. Over the 14-year study period, the DON increased by 108.6% at the low elevation, increased by 92.0% at the medium elevation, decreased by 28.1% at the high elevation, and decreased by 74.7% at the top elevation