Abstract
This study analyses the revegetation of the historical landslide of Valmorel (900 ma.s.l. ca.: province of Belluno) carried out in the years 1950-1970 with methodsdifferent from the actually normally used, that is without great ground moulding,preserving the residual vegetation islands and using native propagation material. Forthe years ’54-’91 the evolution of the vegetation cover has been studied throughanalysis of aerial photographs and pointing out the important role of the naturalrevegetation. The present vegetation dynamics were evaluated on the basis ofphytosociological surveys. Indexes of species and phytocoenoses naturalness, useful forevaluating the naturalness of the vegetation created by the revegetation works, were defined. By means of these indexes the revegetation of Valmorel were compared withrecent revegetation of the Trento province: for these last ones, clearly lower valueswere found, mainly due to the use of non-native propagation material.
