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Species and Phylogenetic Heterogeneity in Visitation Affects Reproductive Success in an Island System
Lorraine J. Adderley and Jana C. Vamosi
International Journal of Plant Sciences
Vol. 176, No. 2 (February 2015), pp. 186-196
Published by: The University of Chicago Press
Stable URL: http://www.jstor.org/stable/10.1086/679617
Page Count: 11
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Plant-pollinator mutualisms can be disrupted in fragmented and isolated populations. Isolated populations attract fewer and less diverse pollinators, but it is not generally known whether this is due to reductions in the abundance and/or diversity of flowers at a site or to the biogeography of pollinators (or both). Islands represent one system potentially suitable to analyze the effects of spatial isolation. Here, we examine the contribution that differences in visitor composition make to increased selfing and seed production by examining the major visitors to Plectritis congesta in populations on the Gulf Islands and Vancouver Island. We find that (1) connectivity is more strongly associated with visitor assemblages and seed production than components of the floral community and (2) taking phylogeny into account suggests that increased visitation by solitary bees as opposed to other functional groups increases female fitness in P. congesta.
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