|
Model
|
Stand age (yrs)
|
Intercept (ln(α))
|
Slope (β)b
|
Model
|
fit
|
criteria
|
|---|
|
R
2
|
AIC
|
RMSE
|
|---|
|
1
|
6
|
−2.9
|
2.57 (2.49–2.65)
|
0.997
|
−70.8
|
0.077
|
|
15
|
−2.01
|
2.25 (2.11–2.39)
|
0.984
|
−84.0
|
0.095
|
|
27
|
−0.32
|
1.84 (1.53–2.15)
|
0.909
|
−45.5
|
0.717
|
|
34
|
−2.12
|
2.43 (2.18–2.68)
|
0.958
|
−64.3
|
0.143
|
|
All ages
|
−2.83
|
2.60 (2.46–2.74)
|
0.954
|
−170.6
|
0.271
|
|
2
|
6
|
−3.49
|
0.97 (0.94–1.00)
|
0.998
|
−66.6
|
0.089
|
|
15
|
−3.64
|
0.96 (0.90–1.02)
|
0.980
|
−79.4
|
0.107
|
|
27
|
−1.71
|
0.78 (0.67–0.89)
|
0.938
|
−51.4
|
0.059
|
|
34
|
−3.08
|
0.93 (0.87–0.99)
|
0.983
|
−80.5
|
0.092
|
|
All ages
|
−3.31
|
0.95 (0.91–0.99)
|
0.976
|
−217.1
|
0.192
|
|
3
|
6
|
−4.85
|
3.79 (3.22–4.36)
|
0.93
|
−24.2
|
0.365
|
|
15
|
−11.28
|
5.85 (4.71–6.99)
|
0.858
|
−42.3
|
0.285
|
|
27
|
−5.53
|
3.79 (2.73–4.85)
|
0.79
|
−32.8
|
0.274
|
|
34
|
−4.15
|
3.23 (2.63–3.83)
|
0.876
|
−44.8
|
0.246
|
|
All ages
|
−3.49
|
3.04 (2.81–3.27)
|
0.911
|
−126.6
|
0.376
|
- Model fit statistics of the best model for a given plantation age are in bold face
-
aAll parameters were significantly different from zero. Therefore P values were not included
-
bFigures in parentheses represent 95% confidence limits of the slope. Two or more slopes are significantly different from each other only if their confidence limits do not overlap
