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The global distribution and drivers of alien bird species richness

dc.contributor.authorDyer, Ellie E.en_ZA
dc.contributor.authorCassey, Phillipen_ZA
dc.contributor.authorRedding, David W.en_ZA
dc.contributor.authorCollen, Benen_ZA
dc.contributor.authorFranks, Victoriaen_ZA
dc.contributor.authorGaston, Kevin J.en_ZA
dc.contributor.authorJones, Kate E.en_ZA
dc.contributor.authorKark, Saliten_ZA
dc.contributor.authorOrme, C. Daviden_ZA
dc.contributor.authorBlackburn, Tim M.en_ZA
dc.date.accessioned2017-03-16T07:43:16Z
dc.date.available2017-03-16T07:43:16Z
dc.date.issued2017-01-12
dc.identifier.citationDyer, E. E. et al. 2017. The global distribution and drivers of alien bird species richness. PLoS Biology, 15(1):e2000942, doi:10.1371/journal.pbio.2000942.
dc.identifier.issn1545-7885 (online)
dc.identifier.otherdoi:10.1371/journal.pbio.2000942
dc.identifier.urihttp://hdl.handle.net/10019.1/100684
dc.descriptionCITATION: Dyer, E. E. et al. 2017. The global distribution and drivers of alien bird species richness. PLoS Biology, 15(1):e2000942, doi:10.1371/journal.pbio.2000942.
dc.descriptionThe original publication is available at http://journals.plos.org/plosbiology
dc.description.abstractAlien species are a major component of human-induced environmental change. Variation in the numbers of alien species found in different areas is likely to depend on a combination of anthropogenic and environmental factors, with anthropogenic factors affecting the number of species introduced to new locations, and when, and environmental factors influencing how many species are able to persist there. However, global spatial and temporal variation in the drivers of alien introduction and species richness remain poorly understood. Here, we analyse an extensive new database of alien birds to explore what determines the global distribution of alien species richness for an entire taxonomic class. We demonstrate that the locations of origin and introduction of alien birds, and their identities, were initially driven largely by European (mainly British) colonialism. However, recent introductions are a wider phenomenon, involving more species and countries, and driven in part by increasing economic activity. We find that, globally, alien bird species richness is currently highest at midlatitudes and is strongly determined by anthropogenic effects, most notably the number of species introduced (i.e., “colonisation pressure”). Nevertheless, environmental drivers are also important, with native and alien species richness being strongly and consistently positively associated. Our results demonstrate that colonisation pressure is key to understanding alien species richness, show that areas of high native species richness are not resistant to colonisation by alien species at the global scale, and emphasise the likely ongoing threats to global environments from introductions of species.en_ZA
dc.description.urihttp://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.2000942
dc.format.extent25 pages
dc.language.isoen_ZAen_ZA
dc.publisherPublic Library of Science
dc.subjectBiological invasionsen_ZA
dc.subjectBirdsen_ZA
dc.subjectBiodiversityen_ZA
dc.titleThe global distribution and drivers of alien bird species richnessen_ZA
dc.typeArticleen_ZA
dc.description.versionPublisher's version
dc.rights.holderAuthors retain copyright


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