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

Table 1

Site, climate, and treatment information for study sites.

Site	SBPSxc	IDFdk3-A	IDFdk3-B	IDFdk3-C	SBSdw1-A	SBSdw1-B
Site characteristics
Location	Clusko R.	Meldrum Cr.	Moffat L.	Meldrum Cr.	Hayfield	Two Mile L.
Latitude/longitude	52^o29′N/124^o06′W	52^o0′N/122^o20′W	52^o05′N/121^o50′W	52^o01′N/122^o20′W	52^o06′N/121^o21′W	52^o05′N/121^o23′W
Elevation (m)	1125	900	1045	900	1097	1025
BEC unit/site series	SBPSxc/01	IDFdk3/01	IDFdk3/01	IDFdk3/01	SBSdw1/01	SBSdw1/01
Site index (m)^1	13.8	20.5	20.5	20.5	21.8	21.8
Climate^2
Mean annual precipitation (mm)	377	445	513	467	612	601
Mean annual temperature (°C)	1.7	4.0	3.2	4.3	2.7	3.0
Average frost-free period (days)	26	91	72	95	65	69
GDD (°5 C)	827	1288	1096	1345	1001	1047
Date of harvest	1989	1980	1981	1980	1978	1977
Site preparation date and method	n/a	Ripping 1992	n/a	n/a	n/a	n/a
Date of brushing treatment	2001	1998	n/a	n/a	n/a	n/a
Regeneration method	Natural	Planted	Natural	Natural	Natural	Natural
Type of study	Variable density		Retrospective (no treatment)
Treatments	1000 sph	1000 sph	n/a	n/a	n/a	n/a
	2500 sph	2500 sph	n/a	n/a	n/a	n/a
	1 m radius	4000 sph	n/a	n/a	n/a	n/a
	No treatment	No treatment	n/a	n/a	n/a	n/a
Number of blocks	5	3	n/a	n/a	n/a	n/a
Assessment years^3	2001, 2003, 2005, 2008	2002, 2004, 2006, 2009	1992, 1995, 1999, 2004		1992, 1994, 1999, 2004

¹For lodgepole pine [17].
²Based on information from Climate BC [15].