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Table I

Main stand variables of plots used to fit the equation (9) (data from 2nd SNFI). N - Natural stands; P - Plantation stands.

Species Region Origin No.plots Statistic No. Hdom Dg G
No.plots trees ha−1 (m) (cm) (m2 ha−1)
N 164 Mean 733 17.9 29.5 36.3
1 std 657.5 4.7 9.7 12.3
Min 129 8.2 10.9 16.9
Max 5126 28.2 51.8 84.5

pinus sylvestris P 98 Mean 1452 10.6 17.9 32.7
std 659.3 2.9 4.6 11.2
Min 349 5.9 9.7 15.2
Max 3547 20.5 37.1 60.8

N 304 Mean 755 16.4 27.9 35.9
2 std 534.6 4.0 8.4 11.9
Min 130 5.0 10.8 15.7
Max 3530 27.8 51.5 76.5

P 164 Mean 1379 11.5 19.3 31.8
std 732.5 4.1 7.3 10.7
Min 268 5.2 9.7 14.9
Max 3756 22.7 40.8 59.8

1 193 Mean 738 8.1 13.3 8.3
Quercus pyrenaica std 759.8 2.5 6.0 7.4
Min 78 3.6 7.6 0.6
Max 4170 16.9 50.3 34.0

2 388 Mean 862 8.7 14.7 12.2
std 724.0 2.9 7.3 9.2
Min 79 2.5 7.5 0.6
Max 3756 17.4 51.8 45.9