Rezumat articol ediţie STUDIA UNIVERSITATIS BABEŞ-BOLYAI

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The general trends of the spontaneous vegetation development on the mining waste dumps from Roşia Montană were investigated and the relationships between the vegetation cover, waste dump age and some of its geomorphological characteristics were studied. The analysis conducted on the 60 years old waste dump identified 53 mining spoils patches that are not covered yet with spontaneous vegetation. In addition to the mining spoil patches, three vegetation patch types were distinguished within the study area: grasslands, heathlands and woodlands. At the landscape level, in all patch types we identified 267 plant species but on the oldest mining spoils patches we only find 61 species represented by 1-10 individuals. Regarding the geomorphological characteristics of the oldest dump, we find that shadier slopes have a higher vegetation cover than sunny slopes. Also the vegetation cover of exposed spoils decreases with increasing distance to semi-natural grassland patches.

Keywords: mining waste dump, Roşia Montană, spontaneous vegetation succession.