Factors que afecten l’èxit d’expansió de poblacions d’aus en medis transformats per l’home: l’arpella "Circus aeruginosus" a la Vall de l’Ebre Factors affecting expansion success of bird populations in human-transformed environments: the marsh harrier Circus aeruginosus in the Ebro Valley 

Cardador Bergua, Laura (Date of defense: 2011-10-07)

Change in species geographic ranges is a natural phenomenon, but the rate and magnitude of such change has significantly increased due to anthropogenic causes. The rate at which a population spreads/contracts through space ...