Electronic Supplementary Material (ESM) Table 1 Lizard removal summary. Estimates of S. occidentalis lizard abundance per hectare using mark-recapture methods before the removal experiment began. Lizard removal plots are indicated in bold and the total number of lizards removed from each plot is provided in the second column. Plots with insufficient data to estimate lizard density based on mark-recapture techniques are indicated with an asterisk (*) and instead, the number of lizards encountered is provided.

plot / N before removal (s.e.) / N lizards removed
CC1 / 110.0 (15.03) / 153
CC2 / 43.78 (7.55) / 116
CC3 / 98.66 (13.77) / ---
CC4 / 26.64 (14.87) / ---
CC5 / 36.46 (5.93) / ---
CC6 / 53.55 (12.69) / 103
CC7 / 20.00 (15.49) / ---
MW1 / 18.13 (.38) / 40
MW2 / 39.15 (4.36) / ---
MW3 / 1* (NA) / ---
MW4 / 44.08 (18.81) / ---
MW5 / 17.84 (3.53) / 25
MW6 / 2* (NA) / 10
MW7 / 0* (NA) / ---

Electronic Supplementary Material (ESM) Table 2 Summary of I. pacificus density, infection prevalence and density of infected nymphs

Mean values of I. pacificus density (DON, infection prevalence (NIP), and density of infected nymphs (DIN) are presented with their standard errors on control plots and experimental lizard removal plots. No manipulations were done on the experimental plots “before” the manipulation. These data represent prior data in our before-after control-intervention (BACI) analysis.

Experimental / Control
Before / After / Before / After
2006 / 2007 / 2008 / 2009 / 2006 / 2007 / 2008 / 2009
Mean / SE / Mean / SE / Mean / SE / Mean / SE / Mean / SE / Mean / SE / Mean / SE / Mean / SE
DON / 109.5 / 2.568 / 129.7 / 2.44 / 101.3 / 1.727 / 105.2 / 1.907 / 110.1 / 2.535 / 137.8 / 2.351 / 81.25 / 0.852 / 123.8 / 2.61
NIP / 9.77 / 0.212 / 8.927 / 0.614 / 6.684 / 0.248 / 3.401 / 0.131 / 11.81 / 0.079 / 5.866 / 0.103 / 4.41 / 0.236 / 4.496 / 0.176
DIN / 11.38 / 1.084 / 5.75 / 0.507 / 2.5 / 0.687 / 4 / 0.641 / 12.5 / 0.758 / 15 / 2.144 / 7.167 / 1.187 / 4.667 / 1.119

Electronic Supplementary Material (ESM) Figure 1

Field-derived and generalized linear mixed-effect model predicted values between control and experimental plots on density or infection prevalence of I. pacificus ticks. Plots a-d depict the mean values across the 4 study years on control and experimental plots showing (a) mean larval density, (b) mean nymphal density, (c) nymphal infection prevalence, and (d) density of infected nymphal ticks. Timing and impact of the experimental removal is indicated by the dark bar underneath plots a-d. Plots e-h show GLMM model predicted values on control and experimental plots for (e) larval density, (f) nymphal density, (g) nymphal infection prevalence, and (h) density of infected nymphal ticks.