Competition of a nectar-robbing bumble bee with a legitimate forager and its consequences for female reproductive success of Fuchsia magellanica

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dc.contributor.advisorHarder, Lawrence D.
dc.contributor.advisorAizen, Marcelo A.
dc.contributor.authorRosenberger, Nick Martin
dc.contributor.committeememberPost, John R.
dc.contributor.committeememberCartar, Ralph Victor
dc.date2018-11
dc.date.accessioned2018-09-27T15:38:26Z
dc.date.available2018-09-27T15:38:26Z
dc.date.issued2018-09-14
dc.description.abstractIn pollination systems, competition can cause floral visitors to adopt behaviors at high densities that may antagonize floral reproduction. I evaluated the density-dependence of nectar robbing by a short-tongued bumble bee, Bombus terrestris, and its consequences for both competition with an effective pollinator, Bombus dahlbomii, and female reproduction by the shrub Fuchsia magellanica. Daily sampling documented an abrupt, density-dependent transition from no robbing to almost exclusive robbing by B. terrestris. Robbing facilitated flower visitation by B. terrestris while aggravating its competition with B. dahlbomii. Nectar depletion and flower damage caused by robbing reduced pollen receipt by F. magellanica flowers, depressed pollen-tube success and reduced fruit quantity and quality. This research demonstrates that by modifying floral conditions to suit their foraging needs nectar robbers can gain a competitive advantage over effective pollinators, possibly promoting their long-term decline, while also compromising reproduction by the affected plant species.en_US
dc.identifier.citationRosenberger, N. M. (2018). Competition of a nectar-robbing bumble bee with a legitimate forager and its consequences for female reproductive success of Fuchsia magellanica (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/33042en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/33042
dc.identifier.urihttp://hdl.handle.net/1880/108689
dc.language.isoeng
dc.publisher.facultyGraduate Studies
dc.publisher.facultyScience
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subjectcompetition
dc.subjectmutualism
dc.subjectPollination
dc.subjectnectar robbing
dc.subjectantagonism
dc.subjectdensity-dependence
dc.subjectInvasive species
dc.subject.classificationEcologyen_US
dc.titleCompetition of a nectar-robbing bumble bee with a legitimate forager and its consequences for female reproductive success of Fuchsia magellanica
dc.typemaster thesis
thesis.degree.disciplineBiological Sciences
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameMaster of Science (MSc)
ucalgary.item.requestcopytrue
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