2015
DOI: 10.1111/1365-2745.12377
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High‐elevation range limit of an annual herb is neither caused nor reinforced by declining pollinator service

Abstract: Summary Pollination failure has been proposed to be an important determinant of plant species’ range limits if pollinator activity declines along an environmental gradient, directly limiting plant populations, or if plant populations decline along an environmental gradient and subsequently fail to attract sufficient visitation. Both mechanisms predict reduced pollinator visitation, increased pollen limitation and decreased seed production towards range limits, and the first additionally predicts declining po… Show more

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Cited by 43 publications
(61 citation statements)
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“…Because autofertile plants are able to set fruit and produce seeds without compatible mates and pollinators, this might have helped them prevent pollen limitation (Martén‐Rodríguez & Fenster ; Hargreaves, Weiner & Eckert ). However, while fruit set and seed production for some species in our study were as high in the pollinator‐exclusion treatment as in the pollen‐supplementation treatment (Fig.…”
Section: Discussionmentioning
confidence: 99%
“…Because autofertile plants are able to set fruit and produce seeds without compatible mates and pollinators, this might have helped them prevent pollen limitation (Martén‐Rodríguez & Fenster ; Hargreaves, Weiner & Eckert ). However, while fruit set and seed production for some species in our study were as high in the pollinator‐exclusion treatment as in the pollen‐supplementation treatment (Fig.…”
Section: Discussionmentioning
confidence: 99%
“…Flowers are bee (Bombus spp.) pollinated, but can produce a full complement of viable seedsup to 18/fruitby autonomous self-pollination (Hargreaves et al 2015b). Seeds rarely disperse > 2 m (Westbury 2004), making edge populations critical for beyond-range colonisation, though wet seeds can adhere to deer hide for > 100 m, potentially enabling rare long-distance dispersal (Murphy, Hargreaves, Eckert unpublished data).…”
Section: Study Systemmentioning
confidence: 99%
“…; Hargreaves et al . ). Several studies have found that the frequency and/or effectiveness of pollinator visits declines for range‐edge versus central populations, either as a response to declining environmental conditions for the pollinator or reduced density of the host plant (Chalcoff et al .…”
Section: Introductionmentioning
confidence: 97%