Identifying and Characterizing Important Trembling Aspen Competitors with Juvenile Lodgepole Pine in Three South-Central British Columbia Ecosystems
Table 3
Characteristics1 of principal competitor (PC) aspen2.
Site
Year
Age (years)
Principal competitor aspen
Target lodgepole pine
PC aspen/target pine height relationships
3
CHR
BA per stem (cm2)
Height (cm)
3
Height (cm)
Stem diameter (cm)
HDR4
3
Height difference (cm)
Height ratio
SBPSxc
2001
11
586
3.25
8.4 ± 0.2
273 ± 4
304
70 ± 2
1.3 ± 0.03
53.7 ± 0.5
586
219 ± 4
5.4 ± 0.1
2005
15
701
1.5
12.3 ± 0.3
326 ± 4
299
148 ± 3
2.9 ± 0.05
51.5 ± 0.4
701
191 ± 4
2.6 ± 0.0
IDFdk3-A
2002
10
135
2.0
12.0 ± 0.5
356 ± 8
182
202 ± 4
3.2 ± 0.07
64.6 ± 0.8
135
226 ± 6
3.1 ± 0.1
2006
14
254
1.25
17.6 ± 0.5
458 ± 5
181
347± 7
5.5 ± 0.12
65.2 ± 0.8
254
182 ± 5
1.8 ± 0.1
IDFdk3-B
1992
8
322
2.0
12.6 ± 0.5
361 ± 5
50
131 ± 5
2.0 ± 0.08
66.4 ± 1.5
322
247 ± 5
3.4 ± 0.1
1999
15
231
1.25
31.2 ± 1.0
638 ± 9
59
411 ± 12
6.3 ± 0.24
67.8 ± 1.5
231
299 ± 10
2.1 ± 0.1
IDFdk3-C
1992
12
431
1.25
9.2 ± 0.4
359 ± 5
49
197 ± 8
3.0 ± 0.15
66.2 ± 1.4
431
185 ± 5
2.2 ± 0.0
1999
19
335
1.25
23.9 ± 0.9
679 ± 8
51
449 ± 14
7.1 ± 0.38
67.9 ± 2.1
335
352 ± 9
2.4 ± 0.1
SBSdw1-A
1992
10
220
1.5
20.6 ± 0.7
522 ± 6
49
301 ± 8
4.7 ± 0.18
66.7 ± 1.8
220
264 ± 5
2.1 ± 0.0
1999
17
219
1.25
60.9 ± 2.4
956 ± 11
59
654 ± 21
9.2 ± 0.47
77.1 ± 2.3
219
427 ± 11
1.9 ± 00
SBSdw1-B
1992
11
285
1.0
22.5 ± 0.9
568 ± 8
47
345 ± 9
5.6 ± 0.23
63.9 ± 2.0
285
231 ± 8
1.8 ± 0.0
1999
18
152
1.5
86.4 ± 4.1
1208 ± 18
55
695 ± 18
11.0 ± 0.49
67.5 ± 2.2
152
630 ± 17
2.2 ± 0.1
1Values are presented as mean ± 1 standard error. 2Each subplot has an area of 10 m2 (1.78 m radius). 3For principal competitor aspen, “” refers to the total number of aspen across all pine-centred subplots contributing to the analysis. For target lodgepole pine and PC aspen/target pine height relationships, “” refers to the number of lodgepole pine-centred subplots contributing to the analysis. 4HDR refers to the height to ground level diameter ratio for the target lodgepole pine.
