Spatiotemporal variation in the reproductive ecology of two parapatric subspecies of<i>Oenothera cespitosa</i>(Onagraceae)

Artz, Derek R.; Villagra, Cristian A.; Raguso, Robert A.

doi:10.3732/ajb.1000086

Cited by 32 publications

(43 citation statements)

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“…Hawkmoth pollination increases outcrossing rates (Herrera 1987; Brunet and Sweet 2006; Brunet and Holmquist 2009) and can substantially increase plant fitness (Rhodes et al , in review) but large hawkmoth-flowers and high nectar volumes can be costly to produce, especially in the resource-poor Chihuahuan Desert where the majority of these taxa occur. In populations that were historically allopatric, the cost of hawkmoth pollination and the spatial and temporal patchiness of hawkmoth abundance (Miller 1981; Campbell et al 1997; Artz et al 2010) may have driven shifts from hawkmoth to bee pollination accompanied by a reduction in Mompha florivory.…”

Section: Discussionmentioning

confidence: 99%

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Herbivory as an important selective force in the evolution of floral traits and pollinator shifts

et al. 2016

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The diversity of floral forms in angiosperms is frequently attributed to pollinators but herbivores can be just as important. Here we examine the role of a flower-feeding caterpillar, Mompha, in driving floral trait evolution and subsequent pollinator-shifts in a recently radiated clade of flowering plants, Oenothera sect. Calylophus (Onagraceae). Longer-tubed, hawkmoth flowers had substantially greater damage compared to smaller bee-pollinated flowers. Mompha's preference for longer-tubed flowers, which is evident even within populations of some species, may have played an important role in driving the morphological changes associated with shifts from hawkmoth to bee pollination.

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Section: Discussionmentioning

confidence: 99%

“…1H). The adults are active at dusk and have been observed visiting open flowers (Artz et al 2010), but little is known about the mating biology and oviposition behavior of adult moths. Mompha on Oenothera Sect.…”

Section: Methodsmentioning

confidence: 99%

Herbivory as an important selective force in the evolution of floral traits and pollinator shifts

et al. 2016

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“…Many insectpollinated crops rely on both native bee species and the introduced honey bee, Apis mellifera L., for pollination (Klein et al 2007, James andPitts-Singer 2008), and both natural and agroecosystems experience spatial and temporal variation in the diversity and abundance of pollinators that visit ßowers for nectar and pollen (Gomez and Zamora 1999, Petanidou et al 2008, Brunet 2009, Artz et al 2010.…”

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confidence: 99%

Influence of Honey Bee,Apis mellifera, Hives and Field Size on Foraging Activity of Native Bee Species in Pumpkin Fields

Artz¹,

Hsu²,

Nault³

2011

Environ Entomol

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The purpose of this study was to identify bee species active in pumpkin Þelds in New York and to estimate their potential as pollinators by examining their foraging activity. In addition, we examined whether foraging activity was affected by either the addition of hives of the honey bee, Apis mellifera L., or by Þeld size. Thirty-Þve pumpkin (Cucurbita spp.) Þelds ranging from 0.6 to 26.3 ha, 12 supplemented with A. mellifera hives and 23 not supplemented, were sampled during peak ßowering over three successive weeks in 2008 and 2009. Flowers from 300 plants per Þeld were visually sampled for bees on each sampling date. A. mellifera, Bombus impatiens Cresson, and Peponapis pruinosa (Say) accounted for 99% of all bee visits to ßowers. A. mellifera and B. impatiens visited signiÞcantly more pistillate ßowers than would be expected by chance, whereas P. pruinosa showed no preference for visiting pistillate ßowers. There were signiÞcantly more A. mellifera visits per ßower in Þelds supplemented with A. mellifera hives than in Þelds not supplemented, but there were signiÞcantly fewer P. pruinosa visits in supplemented Þelds. The number of B. impatiens visits was not affected by supplementation, but was affected by number of ßowers per Þeld. A. mellifera and P. pruinosa visits were not affected by Þeld size, but B. impatiens visited fewer ßowers as Þeld size increased in Þelds that were not supplemented with A. mellifera hives. Declining A. mellifera populations may increase the relative importance of B. impatiens in pollinating pumpkins in New York.

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“…Given that flower ambush predators frequently prey on all flower visitors but effective pollinators (sensu Ne'eman et al, 2009) are often a subset of the assemblage of flower visitors (e.g., Artz et al, 2010;Castro et al, 2013), only behavioral changes of these effective pollinators would translate into altered plant fitness. Accordingly, it is not surprising that the effect size of predators on flower visitors behavior is often more important (Romero et al, 2013) than their effect size on plant reproductive success (Knight et al, 2006;Romero and Koricheva, 2011).…”

Section: Introductionmentioning

confidence: 99%

Weak trophic links between a crab-spider and the effective pollinators of a rewardless orchid

Quintero

Corley²,

Aizen

2015

Acta Oecologica

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Spatiotemporal variation in the reproductive ecology of two parapatric subspecies ofOenothera cespitosa(Onagraceae)

Abstract: These findings highlight the importance of variability of pollinator composition and abundance in the evolution of plant breeding systems and reproductive success at varying spatial and temporal scales.

Cited by 32 publications

References 59 publications

Herbivory as an important selective force in the evolution of floral traits and pollinator shifts

Herbivory as an important selective force in the evolution of floral traits and pollinator shifts

Influence of Honey Bee,Apis mellifera, Hives and Field Size on Foraging Activity of Native Bee Species in Pumpkin Fields

Weak trophic links between a crab-spider and the effective pollinators of a rewardless orchid

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