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Título

Prominent role of invasive species in avian biodiversity loss

AutorClavero, Miguel CSIC ORCID; Brotons, Lluís CSIC ORCID; Pons, Pere; Sol, Daniel CSIC ORCID
Palabras claveExtinction
risk Extinction drivers
Biotic homogenization
Invasive species
Habitat destruction
Islands
Fecha de publicaciónoct-2009
EditorElsevier
CitaciónBiological Conservation 142 (2009) 2043–2049
ResumenThe rise of extinction rates associated with human activities has led to a growing interest in identifying extinction-prone taxa and extinction-promoting drivers. Previous work has identified habitat alterations and invasive species as the major drivers of recent bird extinctions. Here, we extend this work to ask how these human-driven impacts differentially affect extinction-prone taxa, and if any specific driver pro- motes taxonomic homogenization of avifauna. Like most previous studies, our analysis is based on global information of extinction drivers affecting threatened and extinct bird species from the IUCN Red List. Unlike previous studies, we employ a multivariate statistical framework that allows us to identify the main gradients of variation in extinction drivers. By using these gradients, we show that bird families with the highest extinction risk are primarily associated with threats posed by invasive species, once spe- cies richness and phylogeny are taken into account. As expected, the negative impact of invasive species was higher on island species, but our results also showed that it was particularly high in those species with small distribution ranges. On the other hand, mainland species and island species with large ranges tended to be affected by habitat destruction. Thus the impacts of invasive species promote the process of taxonomic homogenization among islands and between islands and continents. Consequently, intro- duced species may increase biotic homogenization not only directly, as generally believed, but also indi- rectly through their disproportional impact on endemic species imperilment
Versión del editorhttp://dx.doi.org/10.1016/j.biocon.2009.03.034
URIhttp://hdl.handle.net/10261/46561
DOI10.1016/j.biocon.2009.03.034
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