Abstract
Invasive species belong to the main threats to dry grassland biodiversity. That́s why nature conservation managers seek the best ways to remove them and to support the restoration process of original natural habitats. We studied the effect of clear-cutting of invasive black locust (Robinia pseudoacacia L.) on the recovery of former species rich dry grassland vegetation. Ten permanent plots where R. pseudoacacia was cut down were long-term monitored in nature reserves protecting dry grasslands. The representation of dry grassland plants has been increased four times and the representation of synanthropic plants has been decreased two times during 40 years of succession even though R. pseudoacacia still relatively successfully resisted eradication efforts. During the succession after R. pseudoacacia cutting down, the Ellenberg indicator values for nutrients have decreased significantly, but no decrease in the nitrate content of the soil was observed. The long-term monitoring revealed that the restoration of dry grasslands invaded by R. pseudoacacia is possible but very time consuming.
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