Do multiple mechanisms drive the dominance of an invasive plant (<i>Ranunculus ficaria</i>, Ranunculaceae) along an urban stream?

Masters, Jeffery A.; Emery, Sarah M.

doi:10.3159/torrey-d-15-00020.1

Cited by 5 publications

(4 citation statements)

References 29 publications

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“…Non‐native plants such as Japanese knotweed ( Fallopia japonica ) can cause high rates of bank erosion, particularly where channels are incised (Arnold & Toran, ), whereas non‐native tree colonization of bed sediments in reduced flows can lead to channel narrowing (MacCoy & Blew, ). Biogeochemical impacts, in particular changes in leaf litter and organic detritus resulting from invasion by non‐native tree species, and the impacts this may have on macroinvertebrate or microbial communities that rely on such resources. Some studies have found little impact (Kennedy & El‐Sabaawi, ), whereas others have determined lower macroinvertebrate abundance (Fargen, Emery, & Carreiro, ), altered macroinvertebrate feeding groups or communities (Fargen et al, ), lower detritivore densities (Miller & Boulton, ), and increased occurrence of detritivores in association with non‐native litter (Swan, Healey, & Richardson, ), or differences in decay rates (Swan et al, ). Changes in biotic interactions, such as competition (Masters & Emery, ) and predator–prey relationships, that can lead to shifts in trophic position, as observed for fish (Lisi et al, ) and reptiles (Wilhelm & Plummer, ), as diet becomes more focused on non‐native consumption. Such changes are likely to be prolific but remain largely unexplored.…”

Section: Urban Rivers As Landscape Corridors For Non‐nativesmentioning

confidence: 99%

An overview of non‐native species invasions in urban river corridors

Francis

Chadwick

Turbelin

2019

River Research & Apps

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Recent studies have highlighted cities as prime locations for the introduction, establishment, and spread of non‐native and invasive species. As the hydrological arteries of cities, urban river corridors have an important role to play in influencing species invasions. This overview examines existing literature to consider (a) how the landscape functions of urban river corridors (habitat, conduit, barrier/filter, sink, and source) relate to species invasions; (b) the organismal and geographical foci of research into non‐native species invasions along urban rivers; and (c) the need to more fully consider the roles that non‐native species may play in the recombinant communities of novel urban river ecosystems. The review ends with an identification of research priorities at the intersection of urban river corridor function and invasion biology.

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Section: Urban Rivers As Landscape Corridors For Non‐nativesmentioning

confidence: 99%

An overview of non‐native species invasions in urban river corridors

Francis

Chadwick

Turbelin

2019

River Research & Apps

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“…Sw.], but invaded plots ultimately had decreased seed set of both native plants (Masters and Emery 2015b). Ficaria verna presence can also lead to decreased biomass and recruitment of nearby competitors such as grass species (Masters and Emery 2016).…”

Section: Introductionmentioning

confidence: 99%

Soil characteristics drive Ficaria verna abundance and reproductive output

Kermack

Rauschert²

2019

Invasive plant sci. manag.

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Lesser celandine (Ficaria verna Huds.), an invasive plant from Europe, is becoming widespread in river valleys throughout the northeastern United States and the Pacific Northwest. Its high rate of asexual bulbil and tuber production creates dense infestations threatening native spring ephemerals. Ficaria verna abundance and reproductive output (seeds, bulbils, and tubers) were examined in invaded transects spanning a disturbance gradient away from a river. Site characteristics (photosynthetically active radiation [PAR], soil pH, moisture, texture, and nutrients) were quantified to examine their roles in plant abundance and reproduction. A larger-scale study examined random transects not specifically chosen based on F. verna infestations. Soil characteristics and slope were hypothesized to drive F. verna abundance and reproduction; we also hypothesized that reproductive output and biomass would be highest at intermediate distances from rivers, where disturbances are infrequent. Ficaria verna abundance and reproductive output varied considerably by site; soil characteristics, rather than landscape placement, appeared to drive plant abundance and reproduction. Lower percent sand was associated with significantly higher F. verna stem density and bulbil and tuber production. CEC was significantly negatively related to F. verna biomass and tuber counts. In the larger-scale survey, slope and PAR were significantly negatively related to F. verna presence and percent cover, respectively. Overall, these findings suggest that soil texture and slope can help explain higher abundance and reproductive outputs. However, reproductive output and biomass were not significantly greater at intermediate distances, contrary to expectations. We did not observe any seed production in any of the plots, although we did see a few plants with seeds outside our study area in the second year, demonstrating a near-complete reliance on asexual reproduction in these populations. This study expands on the current limited understanding of F. verna and can help management by identifying areas likely to support dense infestations.

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“…Invasive plants that emerge earlier in the growing season than the native plants they grow with may be especially competitive (Rejmánek 2013). Allelopathic properties of the species have been reported (Cipollini and Bohrer 2016;Cipollini and Schradin 2011;Cipollini et al 2012;Masters 2014) but are disputed (Del Fabbro et al 2014;Masters and Emery 2016).…”

mentioning

confidence: 99%

Early-Season Treatment of Fig Buttercup (Ranunculus ficaria)

Frey

Schmit

2017

Invasive plant sci. manag.

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Fig buttercup is a perennial herb native to Europe, temperate Asia, and northern Africa. In eastern North America, fig buttercup competes with native spring ephemerals, complicating control techniques. If chemical control could be shifted earlier in the year, the potential to negatively impact spring ephemerals would be reduced. We tested glyphosate applications on fig buttercup in northern Virginia under three early phenological phases (preflowering, early flowering, and 50% flowering) to assess the effectiveness of early-season treatment. Treating when approximately half of the plants in the population were in flower resulted in a 95% decline in fig buttercup. Treating when the first flower in the population had emerged resulted in a 90% decline. No later phenological phases were treated. Control of fig buttercup led to an increase in cover of Japanese stiltgrass, an invasive grass.

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Do multiple mechanisms drive the dominance of an invasive plant (Ranunculus ficaria, Ranunculaceae) along an urban stream?

Cited by 5 publications

References 29 publications

An overview of non‐native species invasions in urban river corridors

An overview of non‐native species invasions in urban river corridors

Soil characteristics drive Ficaria verna abundance and reproductive output

Early-Season Treatment of Fig Buttercup (Ranunculus ficaria)

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