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Type: Journal article
Title: Mating patterns and pollinator mobility are critical traits in forest fragmentation genetics
Author: Breed, M.
Ottewell, K.
Gardner, M.
Marklund, M.
Dormontt, E.
Lowe, A.
Citation: Heredity, 2015; In Press(2):1-7
Publisher: Nature Publishing Group
Issue Date: 2015
ISSN: 0018-067X
Statement of
MF Breed, KM Ottewell, MG Gardner, MHK Marklund, EE Dormontt and AJ Lowe
Abstract: Most woody plants are animal-pollinated, but the global problem of habitat fragmentation is changing the pollination dynamics. Consequently, the genetic diversity and fitness of the progeny of animal-pollinated woody plants sired in fragmented landscapes tend to decline due to shifts in plant-mating patterns (for example, reduced outcrossing rate, pollen diversity). However, the magnitude of this mating-pattern shift should theoretically be a function of pollinator mobility. We first test this hypothesis by exploring the mating patterns of three ecologically divergent eucalypts sampled across a habitat fragmentation gradient in southern Australia. We demonstrate increased selfing and decreased pollen diversity with increased fragmentation for two small-insect-pollinated eucalypts, but no such relationship for the mobile-bird-pollinated eucalypt. In a meta-analysis, we then show that fragmentation generally does increase selfing rates and decrease pollen diversity, and that more mobile pollinators tended to dampen these mating-pattern shifts. Together, our findings support the premise that variation in pollinator form contributes to the diversity of mating-pattern responses to habitat fragmentation.
Keywords: mating system; plant genetic resources; plant–pollinator mutualisms; pollen competition; pollen discounting
Rights: © 2013 Macmillan Publishers Limited
RMID: 0020137151
DOI: 10.1038/hdy.2013.48
Appears in Collections:Earth and Environmental Sciences publications

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