Developing Species-Age Cohorts from Forest Inventory and Analysis Data to Parameterize a Forest Landscape Model
Table 4
Age-diameter relationships developed from site trees (n = 395) extracted from the New York FIA database.
Species
Dbh (mm)
Age (yrs)
Linear regression model
N
(SE)
(SE)
Range
r2
RMSE
Equation
Fraxinus americana
35
249.7 (12.2)
47.7 (3.9)
21–118
0.63
14.1
<0.001
A = −14.77259 + 0.250115 D
Tilia americana
35
299.5 (13.6)
50.5 (3.3)
24–102
0.56
13.1
<0.001
A = −4.309491 + 0.1830496 D
Prunus serotina
15
273.6 (19.9)
46.9 (5.1)
23–77
0.54
13.8
0.002
A = −4.579108 + 0.1880035 D
Ulmus americana
62
243.0 (10.2)
33.8 (2.5)
17–120
0.52
13.6
<0.001
A = −9.319295 + 0.1774207 D
Acer rubrum
81
255.0 (6.9)
52.0 (1.8)
20–87
0.50
11.7
<0.001
A = 5.018457 + 0.1840787 D
Betula alleghaniensis
10
230.6 (29.4)
57.6 (6.0)
26–88
0.48
14.4
0.025
A = 24.976281 + 0.1414536 D
Quercus rubra
13
282.3 (21.0)
52.2 (4.4)
27–77
0.48
11.9
0.009
A = 11.665456 + 0.1434076 D
Populus tremuloides, P. grandidentata
17
256.5 (21.1)
35.1 (3.1)
19–67
0.45
9.8
0.003
A = 9.7495765 + 0.0986561 D
Tsuga canadensis
22
313.1 (17.8)
69.6 (4.5)
33–115
0.44
16.3
0.001
A = 16.623835 + 0.1693081 D
Pinus strobus, P. resinosa
44
292.9 (9.6)
42.2 (2.2)
19–74
0.42
11.2
<0.001
A = −0.836716 + 0.1473024 D
Acer saccharum
61
288.4 (8.2)
61.3 (2.1)
27–95
0.42
12.6
<0.001
A = 11.430045 + 0.1734929 D
Additional data from FIA plots <500 m elevation located in Clinton, Franklin, Oneida, and Oswego counties included to increase the sample size. Additional data from FIA plots <500 m elevation in all New York counties included to increase the sample size.
