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dc.contributor.authorGeerts, S.
dc.contributor.authorPauw, A.
dc.date.accessioned2013-02-25T10:58:44Z
dc.date.available2013-02-25T10:58:44Z
dc.date.issued2012
dc.identifier.citationGeerts, S. and Pauw, A. (2012). The cost of being specialized: Pollinator limitation in the endangered geophyte Brunsvigia litoralis (Amaryllidaceae) in the Cape Floristic Region of South Africa. South African Journal of Botany 78, 159-164en
dc.identifier.urihttp://hdl.handle.net/123456789/1227
dc.description.abstractThe impacts of habitat fragmentation and reduced population sizes on ecological processes deserve more attention. In this study we examine pollination in rural and urban populations of Brunsvigia litoralis (Amaryllidaceae), an endangered endemic and a flagship species for plant conservation in South Africa. B. litoralis has flowers conforming to the bird-pollination syndrome, but the only flower visitor at the urban sites, the Greater Double-collared Sunbird (Cinnyris afra) (1.6 visits/flower/hour), is unable to access the nectar in the usual way due to a long perianth tube (38.8 mm) and resorts to robbing. Supplemental hand pollination was used to test for pollen limitation of seed set at the urban sites flowers were pollen-supplemented. Seed set in supplemented plants increased by more than an order of magnitude relative to controls. The longer-billed Malachite Sunbird (Nectarinia famosa) was observed as the sole pollinator of B. litoralis at the rural site where seed set was significantly higher. Although B. litoralis plants are long lived, the absence of pollinators in these urban fragments might place populations at an extinction risk.en
dc.format.extent644454 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherElsevieren
dc.subjectFlower robbingen
dc.subjectMalachite Sunbirden
dc.subjectMutualism disruptionen
dc.subjectPlant–pollinator interactionsen
dc.subjectPollen limitationen
dc.subjectSpecialized pollinationen
dc.titleThe cost of being specialized: Pollinator limitation in the endangered geophyte Brunsvigia litoralis (Amaryllidaceae) in the Cape Floristic Region of South Africaen
dc.typeJournalArticlesen
dc.cibjournalSouth African Journal of Botanyen
dc.cibprojectNAen


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