41.B3 - Niveau 4 : Bois de Bouleaux montagnards et subalpins
Description
Birch stands of the montane and sub-alpine levels of the Alps, the Apennines, the Pyrenees, the Jura and the Hercynian ranges, mostly sub-climax formations of stations with anomalous edaphic and microclimatic conditions.
Taxons (Liens actifs si espèces présentes)
41.B33 - Niveau 5 : Bois de Bouleaux pyrénéens
Description
Birch-dominated formations of the Pyrenees, locally frequent in all vegetation levels.