Rodent Granivores Generate Context-specific Seed Removal in Invaded and Uninvaded Habitats

Mattos, Kaitlin; Orrock, John L.; Watling, James I.

doi:10.1674/0003-0031-169.1.168

Cited by 21 publications

(23 citation statements)

References 53 publications

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“…Mey.) during the spring (Mattos et al 2013). These studies indicate some granivores and mesopredators may be positively influenced by the presence of L. maackii; however, more research is needed to identify how the presence of this shrub may influence behavior.…”

Section: Lonicera Maackii Invasion Effects At Various Ecological Scalmentioning

confidence: 86%

Arthropod Communities on Native and Nonnative Early Successional Plants

2013

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Section: Lonicera Maackii Invasion Effects At Various Ecological Scalmentioning

confidence: 86%

Arthropod Communities on Native and Nonnative Early Successional Plants

2013

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“…Accumulating evidence suggests that seed predation can substantially affect nonnative plant establishment and abundance (Reader 1993, Nun˜ez et al 2008, Pearson et al 2011, 2013, Allington et al 2013). Our results provide detailed, experimentally derived evidence that differential seed predation contributes to the varying fates of some introduced plants within and possibly between systems.…”

Section: Discussionmentioning

confidence: 99%

“…Seed predation is an important in situ biotic filter. Native generalist seed predators may also influence nonnative species recruitment (Maron et al, 2014) and adult population densities , 2013, Allington et al 2013. Native generalist seed predators may also influence nonnative species recruitment (Maron et al, 2014) and adult population densities , 2013, Allington et al 2013.…”

Section: Introductionmentioning

confidence: 99%

“…Seed removal rates can vary radically among plant communities and along environmental gradients (Christianini andGaletti 2007, Pearson et al 2013) due to differences in the granivore communities, their abundance, or seed preferences. Consumer abundance, in particular, often differs among habitats, and granivore abundance frequently determines seed removal rates (Ostfeld et al 1997, Zwolak et al 2010, Mattos et al 2013.…”

Section: Introductionmentioning

confidence: 99%

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Granivory of invasive, naturalized, and native plants in communities differentially susceptible to invasion

Connolly

Pearson

2014

Ecology

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Seed predation is an important biotic filter that can influence abundance and spatial distributions of native species through differential effects on recruitment. This filter may also influence the relative abundance of nonnative plants within habitats and the communities' susceptibility to invasion via differences in granivore identity, abundance, and food preference. We evaluated the effect of postdispersal seed predators on the establishment of invasive, naturalized, and native species within and between adjacent forest and steppe communities of eastern Washington, USA that differ in severity of plant invasion. Seed removal from trays placed within guild-specific exclosures revealed that small mammals were the dominant seed predators in both forest and steppe. Seeds of invasive species (Bromus tectorum, Cirsium arvense) were removed significantly less than the seeds of native (Pseudoroegneria spicata, Balsamorhiza sagittata) and naturalized (Secale cereale, Centaurea cyanus) species. Seed predation limited seedling emergence and establishment in both communities in the absence of competition in a pattern reflecting natural plant abundance: S. cereale was most suppressed, B. tectorum was least suppressed, and P. spicata was suppressed at an intermediate level. Furthermore, seed predation reduced the residual seed bank for all species. Seed mass correlated with seed removal rates in the forest and their subsequent effects on plant recruitment; larger seeds were removed at higher rates than smaller seeds. Our vegetation surveys indicate higher densities and canopy cover of nonnative species occur in the steppe compared with the forest understory, suggesting the steppe may be more susceptible to invasion. Seed predation alone, however, did not result in significant differences in establishment for any species between these communities, presumably due to similar total small-mammal abundance between communities. Consequently, preferential seed predation by small mammals predicts plant establishment for our test species within these communities but not between them. Accumulating evidence suggests that seed predation can be an important biotic filter affecting plant establishment via differences in consumer preferences and abundance with important ramifications for plant invasions and in situ community assembly.

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“…For plant invasions in temperate forests, several studies report support for non-trophic apparent competition, specifically greater predation on seeds of native species by rodents in areas with cover of non-native shrubs (Meiners 2007, Dutra et al 2011Bartowitz and Orrock 2016, but see Mattos et al 2013). The only evidence for food-mediated apparent competition comes from Orrock et al ’s (2015) finding that the fruits of the invasive shrub, Lonicera maackii , increased the negative effect of rodents on native plant species richness.…”

Section: Introductionmentioning

confidence: 99%

White-tailed deer browse on an invasive shrub with extended leaf phenology meets assumptions of an apparent competition hypothesis

Martinod

Gorchov²

2017

AoB PLANTS

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We investigated whether white-tailed deer browse on the invasive shrub, Amur honeysuckle, supports key assumptions of the hypothesis that invasives with extended leaf phenology (ELP) impact natives via “apparent competition,” elevating the impact of a shared herbivore. We found that deer browse on honeysuckle was particularly high in early spring, a time of protein scarcity. The leafy twigs of honeysuckle in early spring were higher in protein than leafless twigs of native trees. We estimated that consumption of honeysuckle twigs accounted for 14-47% of the annual food consumption of deer in the study site. These findings show that the hypothesis of apparent competition is compelling.

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Rodent Granivores Generate Context-specific Seed Removal in Invaded and Uninvaded Habitats

Cited by 21 publications

References 53 publications

Arthropod Communities on Native and Nonnative Early Successional Plants

Arthropod Communities on Native and Nonnative Early Successional Plants

Granivory of invasive, naturalized, and native plants in communities differentially susceptible to invasion

White-tailed deer browse on an invasive shrub with extended leaf phenology meets assumptions of an apparent competition hypothesis

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