scholarly journals Shifts to earlier selfing in sympatry may reduce costs of pollinator sharing

Evolution ◽  
2018 ◽  
Vol 72 (8) ◽  
pp. 1587-1599 ◽  
Author(s):  
April M. Randle ◽  
Rachel B. Spigler ◽  
Susan Kalisz
Keyword(s):  
Pollinator Sharing

Temporal patterning of blooming phenology in Pedicularis on Mount Rainier

1983 ◽  
Vol 61 (3) ◽  
pp. 786-791 ◽  
Author(s):  
Virginia Dale Adams
Keyword(s):  
Pollen Grains ◽  
Growing Season ◽  
Sympatric Species ◽  
Temporal Patterning ◽  
Flowering Pattern ◽  
Subalpine Meadow ◽  
Evolutionary Force ◽  
Mount Rainier ◽  
Pollinator Sharing ◽  
Blooming Phenology

The temporal patterning of flowering of five sympatric species of Pedicularis in a subalpine meadow is documented. Two species bloom early in the growing season, one is intermediate, and two flower toward the later part of the season. The differences between species are related to the range of blooming periods (in days), the number of inflorescences at maximum bloom, and the time of peak bloom. No significant variation in flowering pattern occurred during the years of observation (1977, 1978, and 1979). More than 93% of the time individual bumblebees continued to forage on the same Pedicularis species as was previously visited; yet when switches in the diet of the bees occurred, they were more likely to be to another species of Pedicularis. Although individuals of other genera were in bloom, the bees switched to the Pedicularis species most synchronous in time and space to the previously preferred Pedicularis species. Counts were made of the number of pollen grains per flower, the reward for foraging bees. The last species to flower had the greatest reward but also had the largest ratio of the number of pollen grains to the number of ovules as compared with the previously flowering Pedicularis species. These results suggest that pollinator sharing is an important evolutionary force but that the quantity of the pollen reward may be more related to the number of ovules.

Impacts of non-native plants on plant-pollinator interactions.

2020 ◽  
pp. 241-255
Author(s):  
Marcelo A. Aizen ◽  
Carolina L. Morales
Keyword(s):  
Invasive Plants ◽  
Native Plants ◽  
Research Field ◽  
Research Approach ◽  
Negative Effects ◽  
Contradictory Evidence ◽  
Pollinator Sharing ◽  
Terrestrial Biodiversity ◽  
Evolutionary Consequences ◽  
Plant Pollinator

Abstract There has been growing interest in the consequences of invasive non-native plants for the plant-pollinator mutualism, most likely because of its relevance for the maintenance of terrestrial biodiversity and food production. However, the development of this research field has been thematically uneven and the overall evidence inconclusive. Many studies have focused on how non-native plants interact with native plants via pollinator sharing, which have allowed meta-analytical syntheses, whereas several others have looked at how frequently non-native plants integrate into native plant-pollinator webs and how they affect network structure. However, relatively few studies have addressed the consequences of invasive plants for pollinators. Overall, the research approach in this area has been predominantly phenomenological rather than mechanistic, which has hindered our understanding of apparently contradictory evidence. One key characteristic of invasive non-native plants that seems to mediate negative effects on the pollination mutualism is the high relative abundance that they reach at late stages of invasion. This high dominance is apparently the main trigger of all the disruptive direct and indirect effects that are discussed in this chapter. Finally, we identify several intriguing questions on the ecological and evolutionary consequences of invasive plants for the plant-pollinator mutualism waiting to be answered.

Impacts of non-native plants on plant-pollinator interactions.

2020 ◽  
pp. 241-255
Author(s):  
Marcelo A. Aizen ◽  
◽  
Carolina L. Morales ◽  
Keyword(s):  
Invasive Plants ◽  
Native Plants ◽  
Research Field ◽  
Research Approach ◽  
Negative Effects ◽  
Contradictory Evidence ◽  
Pollinator Sharing ◽  
Terrestrial Biodiversity ◽  
Evolutionary Consequences ◽  
Plant Pollinator

There has been growing interest in the consequences of invasive non-native plants for the plant-pollinator mutualism, most likely because of its relevance for the maintenance of terrestrial biodiversity and food production. However, the development of this research field has been thematically uneven and the overall evidence inconclusive. Many studies have focused on how non-native plants interact with native plants via pollinator sharing, which have allowed meta-analytical syntheses, whereas several others have looked at how frequently non-native plants integrate into native plant-pollinator webs and how they affect network structure. However, relatively few studies have addressed the consequences of invasive plants for pollinators. Overall, the research approach in this area has been predominantly phenomenological rather than mechanistic, which has hindered our understanding of apparently contradictory evidence. One key characteristic of invasive non-native plants that seems to mediate negative effects on the pollination mutualism is the high relative abundance that they reach at late stages of invasion. This high dominance is apparently the main trigger of all the disruptive direct and indirect effects that are discussed in this chapter. Finally, we identify several intriguing questions on the ecological and evolutionary consequences of invasive plants for the plant-pollinator mutualism waiting to be answered.

scholarly journals Fly pollination and pollinator sharing in two synchronopatric species: Cordia multispicata (Boraginaceae) and Borreria alata (Rubiaceae)

2000 ◽  
Vol 23 (3) ◽  
pp. 305-311 ◽  
Author(s):  
ISABEL CRISTINA MACHADO ◽  
MARIA IRACEMA LOIOLA
Keyword(s):  
Fly Pollination ◽  
Pollinator Sharing

Pollinator Sharing and Seed Set of Stellaria pubera: Competition for Pollination

Ecology ◽  
1985 ◽  
Vol 66 (2) ◽  
pp. 544-553 ◽  
Author(s):  
Diane R. Campbell
Keyword(s):  
Seed Set ◽  
Competition For Pollination ◽  
Pollinator Sharing

scholarly journals Assessing the risk of stigma clogging in strawberry flowers due to pollinator sharing with oilseed rape

2017 ◽  
Vol 21 ◽  
Author(s):  
Lina Herbertsson ◽  
Ida Gåvertsson ◽  
Björn K Klatt ◽  
Henrik G Smith
Keyword(s):  
Oilseed Rape ◽  
Weather Conditions ◽  
Pollination Success ◽  
Ripening Time ◽  
Flower Visitation ◽  
Negative Effect ◽  
Potential Negative Effect ◽  
Unfavourable Weather ◽  
Pollinator Sharing ◽  
Weight Number

Strawberry and oilseed rape are economically important and co-flowering insect-pollinated crops that may affect each other via shared pollinators. One potential negative effect of pollinator sharing is stigma clogging, i.e. that pollen from one plant species covers the stigma and prevents pollination in the other. We tested if application of oilseed rape pollen on strawberry receptacles reduces pollination with subsequent effects on strawberry weight, number of malformations and ripening time. We simulated real pollination situations by using dead bees mounted on toothpicks to mimic flower-visitation of foraging bees. Six strawberry flowers, usually on different plant individuals, were hand-pollinated sequentially per simulated foraging bout. In half of these foraging bouts, we started with an oilseed rape flower, and in those foraging bouts the proportion oilseed rape pollen was expected to decline with increasing number of visited strawberry flowers. Oilseed rape pollen had no effect on any of the tested variables. Increasing number of previously visited strawberry flowers in the simulated foraging bout enhanced the number of developed achenes, but this was marginally non-significant when accounting for the total number of achenes. Strawberry weight increased and ripening time decreased with increasing number of pollinated achenes, whereas none of the tested factors had any effect on the number of malformations. Our results have implications for strawberry farmers, because shortened ripening time could reduce the risk of yield loss from pests, diseases and unfavourable weather conditions. In addition, we show that oilseed rape pollen is unlikely to disturb pollination success of strawberry flowers.

Facilitative pollinator sharing decreases with floral similarity in multiple systems

Oecologia ◽  
2020 ◽  
Author(s):  
Melissa K. Ha ◽  
Scott A. Schneider ◽  
Lynn S. Adler
Keyword(s):  
Multiple Systems ◽  
Pollinator Sharing

scholarly journals Floral volatiles, pollinator sharing and diversification in the fig–wasp mutualism: insights from Ficus natalensis , and its two wasp pollinators (South Africa)

2011 ◽  
Vol 279 (1734) ◽  
pp. 1731-1739 ◽  
Author(s):  
A. Cornille ◽  
J. G. Underhill ◽  
A. Cruaud ◽  
M. Hossaert-McKey ◽  
S. D. Johnson ◽  
...  
Keyword(s):  
South Africa ◽  
Evolutionary Dynamics ◽  
Fig Wasp ◽  
African Region ◽  
Wasp Species ◽  
Kwazulu Natal ◽  
Pollinator Sharing ◽  
Floral Volatile ◽  
Selection For ◽  
Individual Trees

Combining biogeographic, ecological, morphological, molecular and chemical data, we document departure from strict specialization in the fig-pollinating wasp mutualism. We show that the pollinating wasps Elisabethiella stuckenbergi and Elisabethiella socotrensis form a species complex of five lineages in East and Southern Africa. Up to two morphologically distinct lineages were found to co-occur locally in the southern African region. Wasps belonging to a single lineage were frequently the main regional pollinators of several Ficus species. In South Africa, two sister lineages, E. stuckenbergi and E. socotrensis , pollinate Ficus natalensis but only E. stuckenbergi also regularly pollinates Ficus burkei . The two wasp species co-occur in individual trees of F. natalensis throughout KwaZulu-Natal. Floral volatile blends emitted by F. natalensis in KwaZulu-Natal were similar to those emitted by F. burkei and different from those produced by other African Ficus species. The fig odour similarity suggests evolutionary convergence to attract particular wasp species. The observed pattern may result from selection for pollinator sharing among Ficus species. Such a process, with one wasp species regionally pollinating several hosts, but several wasp species pollinating a given Ficus species across its geographical range could play an important role in the evolutionary dynamics of the Ficus -pollinating wasp association.

scholarly journals Evolutionary relationships among pollinators and repeated pollinator sharing in sexually deceptive orchids

2017 ◽  
Vol 30 (9) ◽  
pp. 1674-1691 ◽  
Author(s):  
R. D. Phillips ◽  
G. R. Brown ◽  
K. W. Dixon ◽  
C. Hayes ◽  
C. C. Linde ◽  
...  
Keyword(s):  
Evolutionary Relationships ◽  
Pollinator Sharing ◽  
Sexually Deceptive Orchids
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