Table 4.

Mean size of the spring and fall peaks of I. ricinus nymphs for the four elevation sites on Chaumont Mountain

Site	Cumulative spring peak (CSP)
	N	CSP mean	CSP StdDev	CSP range	CND2	CSP (%)
Low	15	18,145	10,508	7516–50,801	21,033	85.1
Medium	15	15,573	8538	7247–35,767	17,293	88.5
High	15	10,191	6300	3284–24,780	11,357	87.5
Top	15	2693	1416	842–4974	2826	94.5

Site	Cumulative fall peak (CFP)
	N	CFP mean	CFP StdDev	CFP range	CND2	CFP (%)
Low	15	2887	2456	507–9462	21,033	14.9
Medium	15	1720	1303	308–4361	17,293	11.5
High	15	1166	925	249–2763	11,357	12.5
Top	15	134	129	14–399	2826	5.5

The size of the spring peak and the fall peak of I. ricinus nymphs are shown for each of the four elevation sites on Chaumont Mountain. To compare the size of the cumulative spring peak (CSP) and the cumulative fall peak (CFP), we integrated the area under the curve of the seasonal phenology of the DON (per 100 m²) from 1 January to 31 August (CSP), and from 1 September to 31 December (CFP), respectively. The interpretation of the CSP and CFP are the numbers of I. ricinus nymphs that would have been captured if we had sampled for ticks every day over the corresponding calendar dates. For the CSP and the CFP, the sample size (N = 15 years), mean, standard deviation (StdDev), and range are shown. A second estimate of the cumulative nymphal density (CND2) was calculated by summing the CSP and the CFP. To express the two peaks as a percentage, the CSP and the CFP were each divided by the CND2