Exotic plant invasions in forested wetlands: effects of adjacent urban land use type

Cutway, Heather Bowman; Ehrenfeld, Joan G.

doi:10.1007/s11252-009-0088-9

Cited by 10 publications

(4 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Finally, while the surrounding landscape has been shown to influence the susceptibility of several wetlands to invasion (Findlay and Houlahan 1997;Findlay and Bourdages 2000;Maheu-Giroux and de Blois 2007;Bowman Cutway and Ehrenfeld 2009), we found no effect of the landscape on the level of invasion of peatland intersected by power line ROWs. The low influence of our landscape variables is likely because of the relatively homogenous landscape in the study area.…”

Section: Discussioncontrasting

confidence: 67%

Do power line rights-of-way facilitate the spread of non-peatland and invasive plants in bogs and fens?

Dubé¹,

Pellerin²,

Poulin³

2011

Botany

View full text Add to dashboard Cite

Linear infrastructures are known to facilitate the spread of undesirable species in ecosystems. Compared with other types of infrastructure, the role of power line rights-of-way (ROWs) as dispersal vectors remains poorly understood, especially with regard to peatlands. The aim of our study was to evaluate their impacts on the vegetation of ombrotrophic (bog) and minerotrophic (fen) peatlands. The vegetation communities within and adjacent to power line ROWs were sampled in 23 bogs and 11 fens in southern Québec. In fens, invasive species were found in abundance along the first 250 m within ROWs, while native non-peatland species were able to spread into entire ROWs. Invasive species were also able to colonize the adjacent fen habitats but were mostly concentrated in the first 4 m from ROW edges. Some species were, however, able to establish at more than 43 m from ROWs. Invasive and native non-peatland species were mostly restricted to the first 31 m within ROWs intersecting a bog and almost none dispersed in the adjacent bog habitats. Overall, the average cover of native non-peatland and invasive species in ROWs was mostly related to intrinsic abiotic conditions such as water pH, water conductivity, and water table level, while landscape surrounding the peatland and historical variables (e.g., time elapse since the construction of the ROW) had few impacts in both bogs and fens.

show abstract

Section: Discussioncontrasting

confidence: 67%

Do power line rights-of-way facilitate the spread of non-peatland and invasive plants in bogs and fens?

Dubé¹,

Pellerin²,

Poulin³

2011

Botany

View full text Add to dashboard Cite

show abstract

“…This shrub produces phenolic compounds (tannins) in its leaves and roots (Dorning and Cipollini 2006;Cipollini et al 2008) that are toxic to native plant taxa (Dorning and Cipollini 2006) and deter generalist herbivores (Cipollini et al 2008). Lonicera maackii can be abundant in urban and suburban forested wetlands (Swab et al 2008;Cutway and Ehrenfeld 2009), and its broad distribution in the eastern and central USA overlaps the geographic ranges of many native amphibians. Because the phytochemicals produced by L. maackii are water-soluble (Cipollini et al 2008), they may be bioavailable to aquatic organisms occurring in invaded wetlands.…”

Section: Introductionmentioning

confidence: 99%

Extracts of the invasive shrub Lonicera maackii increase mortality and alter behavior of amphibian larvae

et al. 2010

View full text Add to dashboard Cite

Water-soluble phytochemicals produced by invasive plants may represent novel elements of invaded ecosystems that can precipitate a variety of direct and indirect effects on native organisms. Phenolic compounds in particular are a common plant defense, and these compounds may have disproportionate impacts on amphibians compared to other taxa. We coupled an exploration of invasive plant extract effects on larvae of four amphibian species (the salamander Ambystoma maculatum, the toad Anaxyrus americanus, and the frogs Hyla sp. and Lithobates blairi) with behavioral observations designed to determine whether behavior can ameliorate the negative effects of exposure to invasive plant extracts. Larvae were reared in extracts of the widespread invasive Amur honeysuckle (Lonicera maackii), mixed native leaf litter, and a water control. Anaxyrus americanus tadpoles reared in L. maackii extracts were more likely to die than tadpoles reared in native extracts, but differences in mortality following rearing in native and exotic extracts were not significant for the other three species. Anaxyrus americanus and L. blairi tadpoles made more trips to the surface in L. maackii extracts than in native extracts, consistent with the hypothesis that exotic extracts may interfere with respiratory physiology and suggesting that L. blairi can behaviorally ameliorate the negative effects of L. maackii extracts. Our study highlights both a direct and indirect pathway by which invasive plant extracts may alter the ecological dynamics of native fauna.

show abstract

“…In urban areas, fragments of natural vegetation embedded within urban land uses are frequently but not always highly invaded (Moffatt et al 2004;Borgmann and Rodewald 2005;Kowarik 2005;Ehrenfeld 2008). We have found that wetlands embedded within industrial urban land uses are less invaded than those embedded within residential areas (Ehrenfeld 2008;Bowman Cutway and Ehrenfeld 2009); we now address the potential role of seed dispersal in explaining that difference.…”

Section: Introductionmentioning

confidence: 87%

“…Our previous study (Bowman Cutway and Ehrenfeld 2009) demonstrated that the wetland sites were similar in species composition, structure, and levels of disturbance, and experimental tests of the ability of seeds to germinate and produce vigorous seedlings showed that there was no difference in the ability of seedlings to establish (Bowman Cutway 2004), thus eliminating environmental factors as potential confounding variables. In order to test our hypotheses, we measured wetland edge structure, exotic seed source availability on these edges, composition and number of seeds in the wetland seed rain and seed bank.…”

Section: Introductionmentioning

confidence: 98%

The influence of urban land use on seed dispersal and wetland invasibility

Cutway

Ehrenfeld

2010

Plant Ecol

Self Cite

View full text Add to dashboard Cite

Urban habitats are generally considered highly invaded by exotic species due to the frequency and extent of disturbance caused by human activities and development. Our previous study had demonstrated that forested wetlands within residential areas are more extensively invaded than wetlands within industrial-commercial areas. In this study, we investigate whether the structure of the forest edge and seed dispersal can explain the differential in the invasion of wetlands surrounded by industrial and residential land use. Our results indicate that edges of industrially bordered wetlands are denser, with vegetation concentrated at the boundary of tree growth, whereas the edges of residentially bordered wetlands are more open and diffuse. This difference influences the number of seeds and species capable of dispersing into the wetland. Less dense edges resulted in a higher number of seeds entering residential wetlands; however, there were no differences in the numbers of exotic seeds or exotic species in the seed rain residential and industrial wetlands. Although seed dispersal could not directly explain differences in the current extent of invasion of these sites, seed dispersal did follow corridor pathways, including ditches and trails that breach the edges and extend through the wetlands. These disturbances act as corridors for seed dispersal into both types wetlands and may play a role in introducing new species to the interior of the wetland, an outcome supported by a higher number of exotic species in the seed banks of residential sites. Our results suggest that both the type of adjoining land use and the provision of access to people on trails in urban wetlands can affect the composition of these communities.

show abstract

Exotic plant invasions in forested wetlands: effects of adjacent urban land use type

Cited by 10 publications

References 54 publications

Do power line rights-of-way facilitate the spread of non-peatland and invasive plants in bogs and fens?

Do power line rights-of-way facilitate the spread of non-peatland and invasive plants in bogs and fens?

Extracts of the invasive shrub Lonicera maackii increase mortality and alter behavior of amphibian larvae

The influence of urban land use on seed dispersal and wetland invasibility

Contact Info

Product

Resources

About