Wyser, Nathalie2005-12-062005-12-062005-12-062003https://infoscience.epfl.ch/handle/20.500.14299/220825Forest fragmentation translates a geographical isolation process and has been shown to influence the abundance, the movements and persistence of many species. The structure of the highly fragmented forests of Monteverde, Costa Rica, may exercise a relevant influence on the species richness and individual abundance of many forest-dwelling understory bird species.student work::master thesis