L4a - Closed acidofrequent oak woodlands:
20% of its area is endangered by plant invasion. The most important invasive species is black locust (Robinia pseudoacacia).
Botta-Dukát Z. (2008): Invasion of alien species to Hungarian (semi-)natural habitats Acta Botanica Hungarica 50(Suppl.): 219-227. >>> letöltés (139 KB, PDF)