F1b - Achillea salt steppes:
According to the survey, 12% of its area is endangered by plant invasion, but it is probably an overestimation. The most important invader is the Russian olive (Elaeagnus angustifolia). Black locust (Robinia pseudoacacia) is also seems to be important invaders, but most of the stands where Robinia occurs should not have been classified into this habitat category.
Botta-Dukát Z. (2008): Invasion of alien species to Hungarian (semi-)natural habitats Acta Botanica Hungarica 50(Suppl.): 219-227. >>> letöltés (139 KB, PDF)