Large-Scale Forest Modeling: Deducing Stand Density from Inventory Data
Table 3
Summary of inventory data, estimated mean closure (), and large-scale model agreement with data for the countries. Symbols and units in Table 1.
Country
Numbers of
Inventory
Model fit to data (PRMSE)
Regions3
Species
Forest units1
Cohorts per unit2
Mean
Mean
Modelled closure
Model B
Model B
Czech Rep.
14
5
70
8.5
170
3.76
0.68
10.8
13.6
Denmark
1
5
5
11.0
111
4.04
0.56
9.8
11.9
Estonia
1
4
4
11.3
111
2.26
0.76
18.9
27.2
Finland
2
3
6
7.8
48
1.49
0.51
30.5
55.8
France
22
6
132
8.2
138
5.51
0.62
31.8
35.7
Germany
13
8
104
6.5
136
2.97
0.59
21.3
24.2
Hungary
1
2
2
11.0
121
2.28
0.79
23.8
50.7
Ireland
1
4
4
7.0
109
4.76
0.70
19.7
27.9
Italy
1
4
4
7.0
130
3.07
0.69
25.4
39.8
Latvia
1
5
5
14.0
97
2.11
0.75
17.8
32.3
Lithuania
1
5
5
7.6
90
1.70
0.72
21.2
30.3
Luxembourg
1
4
4
6.0
159
4.21
0.63
17.7
26.4
Netherlands
1
8
8
6.9
128
3.38
0.54
17.0
41.1
Norway
3
2
6
3.7
58
1.98
0.57
23.2
30.9
Poland
1
2
2
8.0
118
2.58
0.76
15.5
22.1
Portugal
1
1
1
3.0
25
1.28
0.79
36.4
34.2
Romania
1
5
5
7.6
96
3.16
0.60
22.4
53.6
Slovak Rep.
1
4
4
13.0
128
2.92
0.75
11.0
12.2
Sweden
6
2
12
9.3
71
1.77
0.62
17.5
23.7
U.K.
4
4
16
9.1
111
3.56
0.63
20.8
26.0
1all forest age cohorts belonging to the same species and region. 2mean number of age cohorts per forest unit. 3Sizes and regions are variable among and within countries [15].
