Table I
Description of the site of origin for seven western redcedar populations in British Columbia Canada, including the biogeoclimatic (BEC) subzone and variant.
| Population number | 2 | 4 | 11 | 12 | 16 | 19 | 23 |
|---|---|---|---|---|---|---|---|
| Population name1 | Yellowpoint | Nicolum | Garibaldi | Kennedy lake | Oliver lake | Gilpin | Creston |
| Elevation (m) | 50 | 320 | 400 | 50 | 65 | 1200 | 635 |
| Latitude | 49° 03′ | 49° 22′ | 49° 57′ | 49° 01′ | 54° 17′ | 49° 02′ | 49° 10′ |
| Longitude | 123° 48′ | 121° 20′ | 123° 10′ | 125° 35′ | 130° 15′ | 118° 20′ | 116° 20′ |
| BEC subzone and variant2 | CDFmm | CWHds1 | CWDds1 | CWHvm1 | CWHvh2 | IDFxh1 | ICHmw2 |
| Precipitation regime3 | Moist (m) | Dry (d) | Dry (d) | Very wet (vw) | Very wet (vw) | Very dry (x) | Moist (m) |
| Actual moisture regime4 | Medium-dry (md) | Fresh (f) | Fresh (f) | Very moist (vm) | Very moist (vm) | Very dry (vd) | Fresh (f) |
| [MAP] Mean annual precipitation (mm)5 | 1097 | 1681 | 1960 | 3327 | 3102 | 677 | 654 |
| [MSP] Mean summer precipitation (mm)6 | 185 | 355 | 372 | 606 | 879 | 260 | 224 |
| [ADI] Annual dryness index7 | 1.10 | 0.58 | 0.49 | 0.35 | 0.34 | 1.28 | 1.27 |
| [SDI] Summer dryness index7 | 10.78 | 5.17 | 4.78 | 2.84 | 1.78 | 7.11 | 8.14 |
| [MAT] Mean annual temperature (°C)5 | 9.6 | 6.4 | 6.2 | 9.2 | 7.6 | 4.8 | 4.2 |
| [MTWM] Mean temperature of coldest month (°C)5 | 2,7 | –3,6 | –2,5 | 4,6 | 3,2 | –6,4 | –7,5 |
| [MTCM] Mean temperature of warmest month (°C)5 | 17.3 | 16 | 15.5 | 15 | 13.5 | 16.1 | 15.9 |
| Continentality (MTWM-MTCM)8 | 14.6 | 19.6 | 18 | 10.4 | 10.3 | 22.5 | 23.4 |
| [SUMAVE] Average summer temperature (°C)5 | 15.06 | 13.44 | 12.78 | 13.18 | 11.5 | 13.02 | 12.72 |
| [SUMMAX] Average maximum temperature (°C)5 | 20.62 | 19 | 18.1 | 16.92 | 14.88 | 20.46 | 20.02 |
Populations 2 through 16 are from coastal biogeoclimatic (BEC) zones, while populations 19 and 23 are from interior biogeoclimatic zones.
A descriptions of the biogeoclimatic (BEC) zone classification system for British Columbia can be found in Meidinger and Pojar (1991).
Five PR categories have been identified by Pojar et al. (1991a) for British Columbia: (1) very dry (x); (2) dry (d); (3) moist (m); (4) wet (w); (5) very wet (vw).
Actual moisture regime is determine on site using indicator species as described by Lloyd et al. (1990), and Green et al. (1984).
Derived from the PRISM climate analysis system and a digital elevation model (Daly et al., 1994, 1997).
Indices have been defined by Guy and Holowachuk (2001).