Identifying and Characterizing Important Trembling Aspen Competitors with Juvenile Lodgepole Pine in Three South-Central British Columbia Ecosystems

Table 4

Odds ratios and confidence limits associated with risk of lodgepole pine having unacceptable vigour as the density of neighbouring aspen with HR ≥ 1.5 and HR ≥ 1.0 increases by one stem.

Site	𝑛^1	Pine age (years)		HR ≥ 1.5			HR ≥ 1.0
		HR assessed	Vigour assessed	Odds ratio	LCL^2	UCL^2	Odds ratio	LCL^2	UCL^2
SBPSxc	304	11	18	1.03	0.94	1.11	1.00	0.93	1.07
IDFdk3-A	183	10	17	1.44	1.20	1.72	1.19	1.08	1.31
IDFdk3-B	50	8	20	1.58	1.20	2.08	1.53	1.18	1.97
IDFdk3-C	49	12	17	1.28	1.10	1.49	1.30	1.12	1.50
SBSdw1-A	51	10	17	1.74	1.27	2.38	1.50	1.20	1.87
SBSdw1-B	51	11	18	1.53	1.16	2.02	1.56	1.18	2.07

¹“𝑛” refers to the number of lodgepole pine-centred subplots contributing to the analysis.
²LCL is lower 95% confidence limit; UCL is upper 95% confidence limit.