Evolution of increased intraspecific competitive ability following introduction: The importance of relatedness among genotypes

Zhang, Zhijie J.; Fang, Zhou; Pan, Xuebiao; Kleunen, Mark van; Mu, Lina; Li, Bo

doi:10.1111/1365-2745.13016

Cited by 22 publications

(30 citation statements)

References 48 publications

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“…Because invasive plants in the introduced range are likely to have neighbors of closely related kin because of their reduced genetic diversity following introduction, they might evolve the ability of kin recognition and a reduced competitive response to kin. For instance, Zhang et al (2019) showed that introduced Alternanthera philoxeroides produced more branches when competing with kin compared to when competing with unrelated genotypes, which consequently increased vegetative reproduction by stem fragmentation. Reduced competitive response to kin potentially increases the fitness of invasive species in the initial stage of invasion, and consequently promotes establishment.…”

Section: Introductionmentioning

confidence: 99%

Differential effect of inter‐ and intraspecific competition on the performance of invasive and native Taraxacum species

Lee

Woo

Kim

2020

Plant Species Biology

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Inter‐ and intraspecific competitive abilities are significant determinants of invasive success and the ecological impact of non‐native plants. We tested two major hypotheses on the competitive ability of invasive species using invasive (Taraxacum officinale) and native (T. platycarpum) dandelions: differential interspecific competitive ability between invasive and native species and the kin recognition of invasive species. We collected seeds from two field sites where the two dandelion species occurred nearby. Plants were grown alone, with kin (plants from the same maternal genotype) or strangers (plants from different populations) of the same species, or with different species in a growth chamber, and the performance at the early developmental stage between species and treatments was compared. The invasive dandelions outcompeted the native dandelions when competing against each other, although no difference between species was detected without competition or with intraspecific competition. Populations of native species responded to interspecific competition differently. The effect of kinship on plant performance differed between the tested populations in both species. A population produced more biomass than the other populations when grown with a stranger, and this trend was manifested more in native species. Our results support the hypothesis that invasive plants have better competitive ability than native plants, which potentially contributes to the establishment and the range expansion of T. officinale in the introduced range. Although kin recognition is expected to evolve in invasive species, the competitive ability of populations rather than kinship seems to affect plant growth of invasive T. officinale under intraspecific competition.

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Section: Introductionmentioning

confidence: 99%

Differential effect of inter‐ and intraspecific competition on the performance of invasive and native Taraxacum species

Lee

Woo

Kim

2020

Plant Species Biology

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“…Most studies of A. philoxeroides to date have focused on differences between plants from the native and invaded range and explored development and performance of the biocontrol agent or plant defensive responses rather than biomass response (equivalent to successful control) of the plants to feeding (Liu et al 2018;Pan et al 2013;Zhang et al 2019). It will therefore be valuable to determine how effective the currently available biological control agents will be on the introduced haplotypes.…”

Section: Discussionmentioning

confidence: 99%

High genetic diversity in the clonal aquatic weedAlternanthera philoxeroidesin the United States

Williams

Harms

Knight

et al. 2020

Invasive plant sci. manag.

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The distribution of genetic diversity in invasive plant populations can have important management implications. Alligator weed (Alternanthera philoxeroides (Mart.) Griseb.) was introduced into the United States around 1900 and has since spread throughout much of the southern U.S. and California. A successful biological control program was initiated in the late 1960s which reduced alligator weed in the southern U.S., although control has varied geographically. The degree to which variation among genotypes may be responsible for variation in control efficacy has not been well studied due to a lack of genetic data. We sampled 373 plants from 90 sites across the U.S. and genotyped all samples at three chloroplast regions to help inform future management efforts. Consistent with clonal spread, there was high differentiation between sites, yet we found six haplotypes and high haplotype diversity (mean h = 0.48) across states, suggesting this plant has been introduced multiple times. Two of the haplotypes correspond to previously described biotypes that differ in their susceptibility to herbicides and herbivory. The geographic distribution of the three common haplotypes varied by latitude and longitude while the other haplotypes were widespread or localized to one or a few sites. All the haplotypes we screened are hexaploid (6n = 102) which may enhance biological control. Future studies can use these genetic data to determine if genotypes differ in their invasiveness or respond differently to control measures. Some states for instance, have mainly a single haplotype and so may respond more uniformly to a single control strategy compared to other states which may require a variety of control strategies. These data will also provide the basis for identifying the source regions in South America, which may lead to the discovery of new biological control agents more closely matched to particular genotypes.

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“…Butomus umbellatus establishment and spread in North American aquatic habitats has generated negative ecological and economic impacts, leading to increased interest in predicting invasiveness, potential distribution (Banerjee et al, in prep), and development of effective management tools for the species [59,70,71]. However, research on B. umbellatus management has largely failed to take into account genetic variation and the implications of differences in ploidy in the invaded range (but see [72][73][74][75][76][77][78][79][80]. However, it is rare that genetic identity of an invader is paired with plasticity to environmental variables and interspecific competition in order to assess invasive potential.…”

Section: Discussionmentioning

confidence: 99%

“…Griseb. (Amaranthaceae) (competition, herbivory, water level) [72][73][74][75][76][77][78][79][80]. However, it is rare that genetic identity of an invader is paired with plasticity to environmental variables and interspecific competition in order to assess invasive potential.…”

Section: Discussionmentioning

confidence: 99%

Competitive Interactions of Flowering Rush (Butomus umbellatus L.) Cytotypes in Submersed and Emergent Experimental Aquatic Plant Communities

Harms

2020

Diversity

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The ability to invade communities in a variety of habitats (e.g., along a depth gradient) may facilitate establishment and spread of invasive plants, but how multiple lineages of a species perform under varying conditions is understudied. A series of greenhouse common garden experiments were conducted in which six diploid and four triploid populations of the aquatic invasive plant Butomus umbellatus L. (Butomaceae) were grown in submersed or emergent conditions, in monoculture or in a multispecies community, to compare establishment and productivity of cytotypes under competition. Diploid biomass overall was 12 times higher than triploids in the submersed experiment and three times higher in the emergent experiment. Diploid shoot:root ratio was double that of triploid plants in submersed conditions overall, and double in emergent conditions in monoculture. Relative interaction intensities (RII) indicated that triploid plants were sixteen times more negatively impacted by competition under submersed conditions but diploid plants were twice as impacted under emergent conditions. Recipient communities were similarly negatively impacted by B. umbellatus cytotypes. This study supports the idea that diploid and triploid B. umbellatus plants are equally capable of invading emergent communities, but that diploid plants may be better adapted for invading in submersed habitats. However, consistently lower shoot:root ratios in both monoculture and in communities suggests that triploid plants may be better-adapted competitors in the long term due to increased resource allocation to roots. This represents the first examination into the role of cytotype and habitat on competitive interactions of B. umbellatus.

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Evolution of increased intraspecific competitive ability following introduction: The importance of relatedness among genotypes

Cited by 22 publications

References 48 publications

Differential effect of inter‐ and intraspecific competition on the performance of invasive and native Taraxacum species

Differential effect of inter‐ and intraspecific competition on the performance of invasive and native Taraxacum species

High genetic diversity in the clonal aquatic weedAlternanthera philoxeroidesin the United States

Competitive Interactions of Flowering Rush (Butomus umbellatus L.) Cytotypes in Submersed and Emergent Experimental Aquatic Plant Communities

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