Competitive dominance of the invasive plant Impatiens glandulifera: using competitive effect and response with a vigorous neighbour

Gruntman, Michal; Pehl, Anne Katrin; Joshi, Srijana; Tielbӧrger, Katja

doi:10.1007/s10530-013-0509-9

Cited by 51 publications

(55 citation statements)

References 41 publications

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“…More effort should be directed towards uncovering such links. Explicit consideration of the functional traits that are associated with competitive suppression and tolerance is likely to result in better understanding of key ecological topics such as the factors governing plant community assembly (Wang et al 2010;Baron et al 2015;Kraft et al 2015), biological invasions (Suding et al 2004;Gruntman et al 2014) and response to global change (Pakeman 2011).…”

Section: Discussionmentioning

confidence: 99%

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Different sets of belowground traits predict the ability of plant species to suppress and tolerate their competitors

et al. 2017

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Background and aims Functional traits may underlie differences in niches, which promote plant species coexistence, but also differences in competitive ability, which drive competitive exclusion. Empirical evidence concerning the contribution of different traits to niche differentiation and the ability to supress and tolerate competitors is very limited, particularly when considering belowground interactions. Methods We grew 26 temperate grassland species along a density gradient of interspecific competitors to determine which belowground traits a) explain species' ability to suppress and tolerate neighbours and b) contribute to niche differentiation, such that species with dissimilar trait values experience reduced competition. Results We found that having larger root systems with extensive horizontal spread and lower root tissue density enabled efficient suppression of neighbours but did not significantly contribute to the ability to tolerate competition. Species with deeper root systems, lower specific root length and less branched roots were better at tolerating competition, but these traits did not significantly affect the ability to suppress neighbours. None of the measured traits contributed significantly to niche differentiation, either individually or in combination. Conclusions This study provides little support for belowground traits contributing to species co-existence through niche differentiation. Instead, different sets of weakly correlated traits enable plants to either suppress or tolerate their competitors.

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Section: Discussionmentioning

confidence: 99%

“…Moreover, we still lack mechanistic understanding of the pathways by which traits affect competitive outcome (Gruntman et al 2014;Aschehoug et al 2016;Shipley et al 2016). Goldberg (1996) proposed that plants can persist and reproduce in the face of competition by exhibiting a strong competitive effect -i.e.…”

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confidence: 99%

Different sets of belowground traits predict the ability of plant species to suppress and tolerate their competitors

et al. 2017

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“…Its invasion of riparian habitats in the region studied was very fast, and it only took 100 years to colonize the majority of the big rivers in the Czech Republic (Py sek & Prach, 1995a, b;Rydlo, 1999). This is associated with this species' tolerance of a wide range of environmental conditions (Beerling & Perrins, 1993), including relatively low soil moisture ( Cuda et al, 2014) and shading (Andrews et al, 2009;Sk alov a et al, 2012Sk alov a et al, , 2013, and is supported by it being highly competitive (Bottollier-Curtet et al, 2013;Sk alov a et al, 2013;Gruntman et al, 2014). This is associated with this species' tolerance of a wide range of environmental conditions (Beerling & Perrins, 1993), including relatively low soil moisture ( Cuda et al, 2014) and shading (Andrews et al, 2009;Sk alov a et al, 2012Sk alov a et al, , 2013, and is supported by it being highly competitive (Bottollier-Curtet et al, 2013;Sk alov a et al, 2013;Gruntman et al, 2014).…”

Section: Introductionmentioning

confidence: 98%

Floods affect the abundance of invasive Impatiens glandulifera and its spread from river corridors

Čuda

Rumlerová

Bruna

et al. 2017

Diversity and Distributions

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Aim Riparian habitats are amongst the most invaded ecosystems world-wide. The great abundance of invasive species in river corridors is attributed to the efficient transport of alien species' propagules and reduced competition from native plants due to regular flooding. Once an invasive species has become established, river corridors can serve as stepping stones for spread into other habitats. We have chosen the Himalayan balsam Impatiens glandulifera Royle, highly invasive annual in riparian areas, as a model for spread of invasive species from linear river corridors. Location Central Europe.Methods We mapped its distribution and recorded its abundance in over 1200 patches along four rivers in central Europe, differing in the time of balsam's introduction . The patches were characterized in terms of the distance from the riverbank, height above the river surface, degree of soil disturbance and flooding regime. ResultsThe patches at sites subject to flooding had twice as many individuals as those that were not subject to flooding, regardless of their distance from the riverbank and height above the river surface. There was a strong effect of the river identity, with river invaded 20 years ago being less infested than those invaded earlier. The distance from the riverbank at which the populations occurred differed and did not depend on river identity/residence time. The patches in tributaries were on average two times further from the bank of the main river than those located elsewhere.Main conclusions Flooding is an important factor affecting the abundance of I. glandulifera, and accounts for its spread and dominance along river corridors probably due to spreading the seeds, increasing nutrient availability and disturbing native vegetation. It is likely that the number of I. glandulifera populations will increase in the future, especially along small water courses.

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“…Moreover, recent studies suggest that invasive populations of this species have evolved enhanced allelopathic ability compared to populations in the native range (Gruntman et al . ; Gruntman, Zieger & Tielbörger ).…”

Section: Introductionmentioning

confidence: 99%

Evolution of plant defences along an invasion chronosequence: defence is lost due to enemy release – but not forever

et al. 2016

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Summary1. The success of invasive plants has often been attributed to their rapid evolution at the introduced range. In particular, release from native enemies has been suggested to select for an evolutionary shift in resource allocation patterns from herbivore defence to increased size. Such evolutionary processes can take place not only between the native and invasive ranges but also within the invasive range over time, but this premise has been very seldom studied. 2. In this study, we examined the potential for post-invasion evolution in two traits hypothesized to facilitate plant invasion success, that is herbivore resistance and allelopathic ability. We studied these traits in the invasive plant Impatiens glandulifera by comparing plants from its native populations and from populations across its invasion chronosequence. 3. Results of common-garden experiment and chemical analyses revealed that plants from native populations or older populations within the invasive range show greater resistance to the generalist herbivore, Deilephila elpenor, coupled with greater production of the secondary defence compound 2-methoxy-1,4-naphthoquinone glycoside. In contrast, no differences were found between populations in their allelopathic effect on the germination of the co-occurring neighbour, Urtica doica. Finally, results from a field survey suggested that older populations within the invasive range incur greater attack rates from local herbivores compared to more recently established populations. 4. Synthesis. Our findings support the idea that the selection pressure of enemy release at the introduced range might attenuate over time, leading to the evolutionary recovery of enemy resistance. This study emphasizes the importance of incorporating the effect of time since introduction when examining evolutionary or ecological processes of plant invasions.

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Competitive dominance of the invasive plant Impatiens glandulifera: using competitive effect and response with a vigorous neighbour

Cited by 51 publications

References 41 publications

Different sets of belowground traits predict the ability of plant species to suppress and tolerate their competitors

Different sets of belowground traits predict the ability of plant species to suppress and tolerate their competitors

Floods affect the abundance of invasive Impatiens glandulifera and its spread from river corridors

Evolution of plant defences along an invasion chronosequence: defence is lost due to enemy release – but not forever

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