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Authordc.contributor.authorMurúa, Maureen 
Authordc.contributor.authorEspinoza, Claudia es_CL
Authordc.contributor.authorBustamante Araya, Ramiro es_CL
Authordc.contributor.authorMarín Briano, Víctor es_CL
Authordc.contributor.authorMedel Contreras, Rodrigo es_CL
Admission datedc.date.accessioned2010-06-23T20:29:43Z
Available datedc.date.available2010-06-23T20:29:43Z
Publication datedc.date.issued2010
Cita de ítemdc.identifier.citationOecologia (2010) 163:153–162en_US
Identifierdc.identifier.otherDOI 10.1007/s00442-010-1587-3
Identifierdc.identifier.urihttps://repositorio.uchile.cl/handle/2250/119056
Abstractdc.description.abstractPollinator-mediated selection is one of the most important factors driving adaptation in flowering plants. However, as ecological conditions change through habitat loss and fragmentation, the interactions among species may evolve in new and unexpected directions. Human-induced environmental variation is likely to affect selection regimes, but as yet no empirical examples have been reported. In the study reported here, we examined the influence of human-induced habitat transformation on the composition of pollinator assemblages and, hence, pollinator- mediated selection on the flower phenotype of Viola portalesia (Violaceae). Our results indicate that pollinator assemblages differed substantially in terms of species composition and visitation rate between nearby native and transformed habitats. Similarly, the insect species that contributed most to visitation rates differed between plant populations. While the magnitude and sign of pollinatormediated selection on flower length and width did not differ between sites, selection for flower number lost significance in the transformed habitat, and a significant pattern of disruptive selection for flower shape, undetected in the native habitat, was present in the transformed one. Overall, the results of this study suggest that humaninduced habitat change may not only modify the species composition of pollinator assemblages, relaxing the selection process on some flower characters, but they may also create new opportunities for fitness-trait covariation not present in pristine conditions.en_US
Patrocinadordc.description.sponsorshipThis research was funded by grant ACT 34/2006. This research complies with the current laws of Chile.en_US
Lenguagedc.language.isoenen_US
Publisherdc.publisherSpringeren_US
Keywordsdc.subjectChileen_US
Títulodc.titleDoes human-induced habitat transformation modify pollinator-mediated selection? A case study in Viola portalesia (Violaceae)en_US
Document typedc.typeArtículo de revista


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