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- W2037854329 abstract "We studied pollinator visitation rates and movement patterns in experimental arrays of irises at two sites within a Louisiana iris hybrid zone. Arrays contained single-flowered stems of red-flowered I. fulva, blue-flowered I. hexagona, and purple-flowered F1 hybrids. At one site, where I. hexagona was the only wild-growing iris, queen bumble bees were the most common pollinator, and the rank order of pollinator visit rates was I. hexagonaI. fulva. At a second site, where I. fulva predominated in the wild, hummingbirds were the most common pollinators, and this order was reversed: I. hexagona<F1<I. fulva. Thus, at both sites, the naturally occurring iris was visited most frequently and F1 flowers were visited more frequently than the non-native species. Pollinators used both long-distance and short-distance cues to discriminate among flowers, and differences in visit rates seemed to be based on differences in the ease of access to pollen and nectar rewards on flowers of different size. Analysis of movement patterns between flowers showed that pollinators were more likely to make parental-F1 transitions than heterospecific transitions. These data suggest that pollinator behavior acts as a partial barrier to initial hybridization, although this barrier largely breaks down after F1 formation. Our results help to explain the existence of many introgressed populations of Louisiana iris, despite the fact that F1s are extremely rare in the wild." @default.
- W2037854329 created "2016-06-24" @default.
- W2037854329 creator A5069503714 @default.
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- W2037854329 date "2000-12-01" @default.
- W2037854329 modified "2023-10-04" @default.
- W2037854329 title "Site-to-site differences in pollinator visitation patterns in a Louisiana iris hybrid zone" @default.
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- W2037854329 doi "https://doi.org/10.1034/j.1600-0706.2000.910319.x" @default.
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