ABSTRACT.-Changes of vegetal cover in the Aragonese western Pyrenees are shown throughout the last 50 years. The evolution is characterized by a generalised revegetation process with an advance of shrubs and forests. The medium and low slopes show the most intense revegetation as a consequence of the agricultural aban-Palabras clave: Cambios de cubierta vegetal, cambios de uso del suelo, sucesión secundaria, NDVI, montaña, Pirineo, España.
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