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dc.contributor.authorBerthouly-Salazar, C.
dc.contributor.authorJanse van Rensburg, B.
dc.contributor.authorLe Roux, J.J.
dc.contributor.authorJansen van Vuuren, B.
dc.contributor.authorHui, C.
dc.date.accessioned2012-12-10T10:55:21Z
dc.date.available2012-12-10T10:55:21Z
dc.date.issued2012
dc.identifier.citationBerthouly-Salazar, Janse van Rensburg, B., Le Roux, J.J., Jansen van Vuuren, B. and Hui, C. (2012) Spatial sorting drives morphological variation in the invasive brid, Acridotheris tristis. PLoS ONE 7: e38145.en
dc.identifier.issn1932-6203en
dc.identifier.urihttp://hdl.handle.net/123456789/1163
dc.description.abstractThe speed of range expansion in many invasive species is often accelerating because individuals with stronger dispersal abilities are more likely to be found at the range front. This ‘spatial sorting’ of strong dispersers will drive the acceleration of range expansion. In this study, we test whether the process of spatial sorting is at work in an invasive bird population (Common myna, Acridotheris tristis) in South Africa. Specifically, we sampled individuals across its invasive range and compared morphometric measurements relevant and non-relevant to the dispersal ability. Besides testing for signals of spatial sorting, we further examined the effect of environmental factors on morphological variations. Our results showed that dispersal-relevant traits are significantly correlated with distance from the range core, with strong sexual dimorphism, indicative of sex-biased dispersal. Morphological variations were significant in wing and head traits of females, suggesting females as the primary dispersing sex. In contrast, traits not related to dispersal such as those associated with foraging showed no signs of spatial sorting but were significantly affected by environmental variables such as the vegetation and the intensity of urbanisation. When taken together, our results support the role of spatial sorting in facilitating the expansion of Common myna in South Africa despite its low propensity to disperse in the native range.en
dc.description.sponsorshipStellenbosch University Subcommittee B, Center for Invasion Biologyen
dc.format.extent335788 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.subjectcommon mynaen
dc.subjectspatial sortingen
dc.titleSpatial sorting drives morphological variation in the invasive brid, Acridotheris tristis.en
dc.typeJournalArticlesen
dc.cibjournalPLoS ONEen
dc.cibprojectSHORT-TERM RESEARCHen


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