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Table I

Forest structural characteristics of the 5 study plots. Data refer to the year 1986 (plot 59, before thinning), and to 2006 (plot 59 after thinning and plots 58, 54, 51, 47). Tree species marked with an asterisk are non-ectomycorrhizal.

59 59 58 54 51 47
Before thinning After thinning
Basal area per tree species Larix decidua, 55.2 Fagus sylvatica, 34.7 Fagus sylvatica, 29.1 Fagus sylvatica, 17.7 Fagus sylvatica, 11.7 Picea abies, 36.7
(m2 ha−1) Fagus sylvatica, 34.7 Larix decidua, 25.5 Picea abies, 3.7 Quercus robur, 3.0 Pinus sylvestris, 7.0 Fagus sylvatica, 7.6
Pinus strobus, 14.7 Quercus robur, 3.2 Picea abies, 1.0 Picea abies, 2.2 Pinus sylvestris, 0.2
Picea abies, 13.7 Acer pseudoplatanus*, 0.6 Quercus robur, 0.1
Quercus robur, 5.3 Fraxinus excelsior*, 0.2
Acer pseudoplatanus*, 0.6 Picea abies, < 0.1
Fraxinus excelsior*, 0.2

Total basal area (m2 ha−1) 124.4 64.2 32.8 21.7 20.9 44.6
Stand age (years) 150 170 120 120 120 100
Height of dominant trees (m) 44 44 31 33 28 28
Stand structure Multi-storied Multi-storied Multi-storied Multi-storied Multi-storied Multi-storied