Research Article
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 | 52o29′N/124o06′W | 52o0′N/122o20′W | 52o05′N/121o50′W | 52o01′N/122o20′W | 52o06′N/121o21′W | 52o05′N/121o23′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 |
| Climate2 | | | | | | | 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 years3 | 2001, 2003, 2005, 2008 | 2002, 2004, 2006, 2009 | 1992, 1995, 1999, 2004 | 1992, 1994, 1999, 2004 |
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1For lodgepole pine [17]. 2Based on information from Climate BC [15].
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