Comparison of pollinator flight movements and gene dispersal patterns in Mimulus ringens

Karron, Jeffrey D.; Tucker, Rosella; Thumser, Nina N; Reinartz, James A.

doi:10.1038/hdy.1995.180

Cited by 50 publications

(41 citation statements)

References 42 publications

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“…This is consistent with other studies showing that most of the pollen is carried over very short distances by insects in animal-pollinated plants (50,(59)(60)(61)(62)(63). We would then expect to find small neighborhood areas (60,64) within which most of the pollen is dispersed.…”

Section: Seed Dispersal Studysupporting

confidence: 80%

Centaurea corymbosa, a cliff-dwelling species tottering on the brink of extinction: A demographic and genetic study

Colas

Olivieri

Riba

1997

Proc. Natl. Acad. Sci. U.S.A.

130

134

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Centaurea corymbosa (Asteraceae) is endemic to a small area (<3 km 2 ), and <500 individuals reproduce in any given year. Nevertheless, enzyme polymorphism was found within and among the six local extant populations, the most distant at 2.3 km. Levels of gene f low among populations and seed and pollen dispersal data indicated very low dispersal capacity. Rarity of long distance dispersal events coupled with traits such as prolonged juvenile period, monocarpy, and self-incompatibility precludes the establishment of new populations and thus the evolution toward colonization ability through increased dispersal rate, polycarpy, or selfcompatibility. The species thus appears to be trapped on an evolutionary dead-end toward extinction, even though, from a preliminary introduction experiment, we conclude that several nearby unoccupied sites would be suitable for the species.

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Section: Seed Dispersal Studysupporting

confidence: 80%

Centaurea corymbosa, a cliff-dwelling species tottering on the brink of extinction: A demographic and genetic study

Colas

Olivieri

Riba

1997

Proc. Natl. Acad. Sci. U.S.A.

130

134

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“…For example, short transits among neighboring plants by pollinators may limit the extent of pollen-mediated gene dispersal, which in turn may influence offspring quality Billinge and Robertson 2008). On the other hand, pollinator flight movements may underestimate the extent of pollen-mediated gene dispersal if pollen carry-over on pollinators is extensive (Broyles and Wyatt 1991;Morris et al 1994;Karron et al 1995).…”

Section: Discussionmentioning

confidence: 97%

Relative contributions to seed production by floral visitors of slickspot peppergrass, Lepidium papilliferum (Brassicaceae)

Robertson

Leavitt

2011

Arthropod-Plant Interactions

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Assessing the relative contributions to seed production made by different types of floral visitors is fundamental to understanding the evolution of floral morphology and the influence that particular pollinator taxa have on plant fitness and reproduction. This 3-year study examined the pollinator activity and the seed production in three populations of Lepidium papilliferum, a threatened mustard endemic to sagebrush-steppe habitat in southwest Idaho. Relative amounts of time visitor taxa spent foraging on flowers, visitation rates (number of flowers visited per unit time during a foraging bout), and pollination effectiveness (fruit set per single visit to a virgin flower) were recorded for each of 12 insect taxa that visited L. papilliferum flowers. Relative contributions to seed production were calculated as the product of relative interaction frequencies (the relative number of flowers visited by each taxon-the ''quantity'' component of pollination) and pollination effectiveness (fruit set per single visit to a virgin flower-the ''quality'' component of pollination). Despite the superiority of some insect taxa in terms of pollination effectiveness, estimates of relative pollinator contributions to seed production were influenced primarily by an insect taxon's interaction frequency with flowers. Pollinator assemblages varied widely both spatially and temporally, which suggest that L. papilliferum is not under strong selective pressure to shift from its generalist pollination strategy toward greater specialization. For this threatened plant, reliance on a diverse assemblage of insect pollinators may serve as an important buffer against disruption in reproductive success caused by fluctuations in population sizes of individual pollinator taxa.

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“…Pollen carryover has long been recognized as an important factor that affects the extent of gene flow in plant populations (Schaal 1980; Karron et al . 1995).…”

Section: Discussionmentioning

confidence: 99%

Heterostylous morph differences in pollen transfer and deposition patterns in Primula sieboldii on a visitation by a queen bumblebee, measured with a semi‐natural experimental system

Matsumura

Washitani

2002

Plant Species Biology

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Under a semi‐natural setting the between‐morph pollen exchange patterns were studied in distylous Primula sieboldii flowers by measuring pollen removal from the anthers on a single visit by a Bombus diversus tersatus queen, and stigmatic pollen deposition along the sequence of the visitation of the opposite‐morph flowers by the bee. Despite the twofold larger number of pollen grains produced in a single flower of the long‐styled morph compared to that of the short‐styled morph, no significant difference in pollen removal from a flower was found between the morphs. The stigmas of the long‐styled morph received significantly more opposite‐morph pollen grains than those of the short‐styled morph on a single visit by the bee. Sufficient legitimate pollen grains, surpassing the ovule number, were loaded on the stigmas of 27% and 17% of visited flowers of the long‐ and short‐styled morphs, respectively. The short‐styled morph could more efficiently donate pollen to the opposite morph stigmas than the long‐styled morph.

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Comparison of pollinator flight movements and gene dispersal patterns in Mimulus ringens

Cited by 50 publications

References 42 publications

Centaurea corymbosa, a cliff-dwelling species tottering on the brink of extinction: A demographic and genetic study

Centaurea corymbosa, a cliff-dwelling species tottering on the brink of extinction: A demographic and genetic study

Relative contributions to seed production by floral visitors of slickspot peppergrass, Lepidium papilliferum (Brassicaceae)

Heterostylous morph differences in pollen transfer and deposition patterns in Primula sieboldii on a visitation by a queen bumblebee, measured with a semi‐natural experimental system

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