Invasive knotweed affects native plants through allelopathy

Murrell, Craig; Gerber, Esther; Krebs, Christine; Parepa, Madalin; Schaffner, Urs; Bossdorf, Oliver

doi:10.3732/ajb.1000135

Cited by 141 publications

(112 citation statements)

References 45 publications

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“…Also Marigo and Pautou [46] claim that for Fallopia taxa, early seasonal development is typical. Taking into account the negative impact of these species on the co-occurring flora [47,48] it could be expected that this impact would be much higher in summer when compared to spring. Indeed, Fallopia plants negatively influenced species richness and total cover of plants, but only in July.…”

Section: Impact Of Fallopia Complex Members On Resident Plant Speciesmentioning

confidence: 99%

The influence of invasive Fallopia taxa on resident plant species in two river valleys (southern Poland)

et al. 2015

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Riparian zones in two rivers in southern Poland were studied in terms of species composition and soil parameters in patches dominated by three knotweed taxa (Fallopia japonica, F. sachalinensis and the hybrid F. ×bohemica). The main purpose was to detect any differences in species diversity, environmental conditions and in the impact of the three Fallopia spp. on resident species. Fieldwork was conducted in spring and summer in 30 invaded plots (in total 90 subplots). It was demonstrated that vegetation dominated by particular knotweed taxa differed in response to soil pH and ammonium, nitrate, and magnesium content. Fallopia spp. (living plants and necromass) had a stronger negative impact on the cover and species diversity of the resident species in summer in comparison with spring. Vegetation patches differed significantly in species composition in relation to the knotweed taxa present. These differences may be the consequence of the differentiated biotopic requirements of Fallopia taxa and the coexisting plants, or to the different impact of the knotweed taxa on the resident species.

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Section: Impact Of Fallopia Complex Members On Resident Plant Speciesmentioning

confidence: 99%

The influence of invasive Fallopia taxa on resident plant species in two river valleys (southern Poland)

et al. 2015

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“…P. x bohemicum; Fallopia x bohemica; F. x bohemicum; Reynoutria x bohemica; R. x bohemicum) POBO10 Background and characteristics: Bohemian knotweed is an herbaceous perennial of the buckwheat family (Polygonaceae). It is a hybrid between Japanese knotweed and giant knotweed which are native to northeastern Asia and were introduced as ornamentals to Europe in the second half of the 19th century and to North America as ornamentals and fodder in the late 19th century (Murrell et al 2011, Urgenson et al 2009). Bohemian knotweed grows best in full sun (Fig.…”

Section: Bohemian Knotweedmentioning

confidence: 99%

“…Bohemian knotweed is considered to be one of the world's worst invasive species due to its aggressive nature, enabling it to destabilize banks along waterways and inflict structural damage to pavement and buildings (Murrell et al 2011). Murrell et al (2011 suggest the success of this species is not only from its ability to outcompete surrounding vegetation but may also be from allelopathic effects.…”

Section: Bohemian Knotweedmentioning

confidence: 99%

An assessment of invasive plant species monitored by the Northern Research Station Forest Inventory and Analysis Program, 2005 through 2010

Kurtz¹

2013

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“…Because of this novelty, and a lack of co-evolutionary history with the introduced invasive species (Verhoeven et al 2009;Saul et al 2013), the native species may be strongly affected by the allelopathic chemicals (Callaway and Vivanco 2007;Jarchow and Cook 2009;Gruntman et al 2014). Indeed, there are many studies showing that the competitive ability of invasive introduced plants is partly mediated by allelopathy (Ens et al 2009;Murrell et al 2011;Bauer et al 2012;Svensson et al 2013;Del Fabbro et al 2014), and thus might contribute to invasiveness.…”

Section: Introductionmentioning

confidence: 99%

Allelopathy of a native grassland community as a potential mechanism of resistance against invasion by introduced plants

Lei

Kleunen

2016

Biol Invasions

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Successful plant invasions depend, at least partly, on interactions between introduced plants and native plant communities. While allelopathic effects of introduced invaders on native resident species have received much attention, the reverse, i.e. allelopathic effects of native residents on introduced plants, have been largely neglected. Therefore, we tested whether allelopathy of native plant communities decreases their invasibility to introduced plant species. In addition, we tested among the introduced species whether the invasive ones are more tolerant to allelopathy of native plant communities than the non-invasive ones. To test these hypotheses, we grew nine pairs of related (congeneric or confamilial) invasive and non-invasive introduced plant species (i.e. 18 species) in the presence or absence of a native grassland community, which consisted of three common forbs and three common grasses, with or without activated carbon in the soil. Activated carbon reduced the survival percentage and growth of introduced plants in the absence of the native plant community. However, its net effect on the introduced plants was neutral or even slightly positive in the presence of the native community. This might suggest that the native plant community imposed allelopathic effects on the introduced plants, and that these effects were neutralized or reduced by activated carbon. The invasive and non-invasive introduced plants, however, did not differ in their tolerance to such allelopathic effects of the native plant community. Thus, although allelopathy of native plant communities might increase their resistance against introduced plants, there was no evidence that tolerance to allelopathy of native plant communities contributes to the degree of invasiveness of introduced plants.

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Invasive knotweed affects native plants through allelopathy

Cited by 141 publications

References 45 publications

The influence of invasive Fallopia taxa on resident plant species in two river valleys (southern Poland)

The influence of invasive Fallopia taxa on resident plant species in two river valleys (southern Poland)

An assessment of invasive plant species monitored by the Northern Research Station Forest Inventory and Analysis Program, 2005 through 2010

Allelopathy of a native grassland community as a potential mechanism of resistance against invasion by introduced plants

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