Mating patterns and pollinator mobility are critical traits in forest fragmentation genetics
2015 (English)In: Heredity, ISSN 0018-067X, E-ISSN 1365-2540, Vol. 115, no 2, 108-114 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2015. Vol. 115, no 2, 108-114 p.
mating system, plant genetic resources, plant-pollinator mutualisms, pollen competition, pollen discounting
Ecology Evolutionary Biology
IdentifiersURN: urn:nbn:se:uu:diva-260273DOI: 10.1038/hdy.2013.48ISI: 000358007200003PubMedID: 24002239OAI: oai:DiVA.org:uu-260273DiVA: diva2:847881