Plant–pollinator interactions between an invasive and native plant vary between sites with different flowering phenology

McKinney, Amy; Goodell, Karen

doi:10.1007/s11258-010-9882-y

Cited by 49 publications

(18 citation statements)

References 60 publications

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“…, Bartomeus et al. , , Muñoz and Cavieres , McKinney and Goodell , ). Our invaded and uninvaded sites were separated by at least 5 km, greater than the normal foraging ranges of most pollinator species.…”

Section: Discussionmentioning

confidence: 97%

Invasion of a dominant floral resource: effects on the floral community and pollination of native plants

Goodell

Parker

2017

Ecology

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Abstract. Through competition for pollinators, invasive plants may suppress native flora. Community-level studies provide an integrative assessment of invasion impacts and insights into factors that influence the vulnerability of different native species. We investigated effects of the nonnative herb Lythrum salicaria on pollination of native species in 14 fens of the eastern United States. We compared visitors per flower for 122 native plant species in invaded and uninvaded fens and incorporated a landscape-scale experiment, removing L. salicaria flowers from three of the invaded fens. Total flower densities were more than three times higher in invaded than uninvaded or removal sites when L. salicaria was blooming. Despite an increase in number of visitors with number of flowers per area, visitors per native flower declined with increasing numbers of flowers. Therefore, L. salicaria invasion depressed visitation to native flowers. In removal sites, visitation to native flowers was similar to uninvaded sites, confirming the observational results and also suggesting that invasion had not generated a persistent buildup of visitor populations. To study species-level impacts, we examined effects of invasion on visitors per flower for the 36 plant species flowering in both invaded and uninvaded fens. On average, the effect of invasion represented about a 20% reduction in visits per flower. We measured the influence of plant traits on vulnerability to L. salicaria invasion using metaanalysis. Bilaterally symmetrical flowers experienced stronger impacts on visitation, and similarity in flower color to L. salicaria weakly intensified competition with the invader for visitors. Finally, we assessed the reproductive consequences of competition with the invader in a dominant flowering shrub, Dasiphora fruticosa. Despite the negative effect of invasion on pollinator visitation in this species, pollen limitation of seed production was not stronger in invaded than in uninvaded sites, suggesting little impact of competition for pollinators on its population demography. Negative effects on pollination of native plants by this copiously flowering invader appeared to be mediated by increases in total flower density that were not matched by increases in pollinator density. The strength of impact was modulated across native species by their floral traits and reproductive ecology.

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Section: Discussionmentioning

confidence: 97%

Invasion of a dominant floral resource: effects on the floral community and pollination of native plants

Goodell

Parker

2017

Ecology

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“…, Vilà et al. ), leading to changes in the behavior and abundance of diverse taxa, including passerines (Watling and Orrock ), bees (McKinney and Goodell ), mosquitos (Conley et al. ), amphibians (Watling et al.…”

Section: Introductionmentioning

confidence: 99%

Invasive exotic shrub modifies a classic animal‐habitat relationship and alters patterns of vertebrate seed predation

Guiden

Orrock

2017

Ecology

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Abstract. Recent evidence suggests that invasive exotic plants can provide novel habitats that alter animal behavior. However, it remains unclear whether classic animal-habitat associations that influence the spatial distribution of plant-animal interactions, such as small mammal use of downed woody debris, persist in invaded habitats. We removed an invasive exotic shrub (buckthorn, Rhamnus cathartica) from 7 of 15 plots in Wisconsin. In each plot, we deployed 200 tagged Quercus rubra seeds in November 2014. After five months, tags were recovered to track spatial patterns of small mammal seed predation. Most recovered tags were associated with consumed seeds (95%); live-trapping, ancillary camera-trapping, and previous behavioral studies suggest that white-footed mice (Peromyscus leucopus) were responsible for most seed predation. In habitats without R. cathartica, most seed predation occurred near woody debris. In habitats with R. cathartica, small mammals rarely consumed seeds near woody debris, and seed predation occurred farther from the plot center and was less spatially clustered. Our results illustrate that invasive exotic shrubs can disrupt an otherwise common animal-habitat relationship. Failing to account for changes in habitat use may diminish our ability to predict animal distributions and outcomes of species interactions in novel habitats created by invasive exotic plants.

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“…The use of sentinel plants is advantageous due to the ability to control for exogenous factors associated with the pollinator community that may influence pollination success, such as flower density, flower morphology, and host fidelity (Hoehn et al. , McKinney and Goodell , , Herbertsson et al. ).…”

Section: Methodsmentioning

confidence: 99%

“…Despite extensive knowledge of the invasion ecology of L. maackii , little is known about how its flowers affect bee communities and their pollination services. The few studies conducted found both evidence for decreased and increased pollination services to neighboring plants (McKinney and Goodell , ).…”

Section: Introductionmentioning

confidence: 99%

Bee communities and pollination services in adjacent crop fields following flower removal in an invasive forest shrub

Cunningham‐Minnick

Peters

Crist

2020

Ecological Applications

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Citation: Cunningham-Minnick, M. J., V. E. Peters, and T. O. Crist. 2020. Bee communities and pollination services in adjacent crop fields following flower removal in an invasive forest shrub. Ecological Applications 30(4):Abstract. The habitat boundaries between crops and seminatural areas influence bee movements and pollination services to crops. Edges also provide favorable conditions for invasive plants, which may usurp pollinators and reduce visitation to native or crop plants. Alternatively, floral displays of alien plants may facilitate, or increase, the pollination success of adjacent plants by attracting more pollinators to the area. Therefore, pollination services of bees from seminatural habitats to crop areas should vary with the presence of invasive floral resources and distance from habitat edges. To test the hypothesis that floral resources of invasive forest shrubs affect the bee community and pollination services in adjacent crop fields, we conducted a 2-yr field experiment along forest-crop edges at five isolated forest remnants. We removed flower buds from a dominant invasive shrub, Lonicera maackii (Amur honeysuckle), along forest-crop edges and paired removals with controls of intact flowers. The bee community, their pollination services, and flower visitation rates were quantified along a 200-m gradient into an adjacent crop field using pan traps and sentinel cucumber plants. Impacts to the bee community were dependent of bee functional traits. Larger bees visited fewer sentinel cucumber flowers in flower removal plots, which corresponded with decreased cucumber pollination compared to plots with honeysuckle flowers at distances >100 m from forest edges. Small-bodied and weaker flying bees visited sentinel plants more frequently closer to the forest edge and increased pollination services to cucumber at distances <100 m from L. maackii shrubs in flower removal plots. After 2 yr, bee abundance and species richness increased within flower removal plots across all distances. High functional diversity of the bee community increased pollination services to sentinel plants and increased cucumber production within 200 m from forest remnants. Our findings suggest that dense floral resources of invasive shrubs suppressed forest-edge bee communities and their pollination services, but also attracted large-bodied generalist bees, which were effective pollinators. This study helps explain how life histories and functional attributes of bees can predict either facilitation or suppression of pollination services to crop or native plants in response to invasive floral resources.

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Plant–pollinator interactions between an invasive and native plant vary between sites with different flowering phenology

Cited by 49 publications

References 60 publications

Invasion of a dominant floral resource: effects on the floral community and pollination of native plants

Invasion of a dominant floral resource: effects on the floral community and pollination of native plants

Invasive exotic shrub modifies a classic animal‐habitat relationship and alters patterns of vertebrate seed predation

Bee communities and pollination services in adjacent crop fields following flower removal in an invasive forest shrub

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