Table 1.

Design of the experiment.

Species	Diversity level	Species combination	No. trees
Fagus sylvatica (beech)	mono	–	252
Quercus petraea (oak)	mono	–	252
Pseudotsuga menziesii (fir)	mono	–	252
Fagus sylvatica	mix2	beech-oak	140
Fagus sylvatica	mix2	beech-fir	140
Quercus petraea	mix2	beech-oak	112
Pseudotsuga menziesii	mix2	beech-fir	112
Fagus sylvatica	mix3	beech-oak-fir	84
Quercus petraea	mix3	beech-oak-fir	84
Pseudotsuga menziesii	mix3	beech-oak-fir	84
Total			1512

Number of planted target trees of each diversity level and species combination. Mono, monoculture; mix2, 2-species mixture; mix3, 3-species mixture.