Escape from competition: Neighbors reduce<i>Centaurea stoebe</i>performance at home but not away

Callaway, Ragan M.; Waller, Lauren P.; Diaconu, Alecu; Pál, Róbert W.; Collins, Alexandra R.; Mueller-Schaerer, Heingz; Maron, John L.

doi:10.1890/11-0518.1

Cited by 70 publications

(86 citation statements)

References 40 publications

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“…This approach assumes that native and invasive alien species behave similarly during the early invasion process, but this has seldom been tested. In fact, recent studies suggest that competitive interactions between resident species with a shared evolutionary history may well differ from those be-tween resident and invasive alien plant species (Callaway et al 2011;Sun et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Origin Matters: Diversity Affects the Performance of Alien Invasive Species but Not of Native Species

Sun

Maron

Schaffner

2015

The American Naturalist

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Online enhancement: appendix. Dryad data: http://dx.doi.org/10.5061/dryad.81nk5.abstract: At local scales, it has often been found that invasibility decreases with increasing resident plant diversity. However, whether resident community diversity similarly resists invasion by alien versus native species is seldom studied. We examined this issue by invading constructed native plant assemblages that varied in species and functional richness with invasive alien or native Asteraceae species. Assemblages were also invaded with spotted knapweed, Centaurea stoebe, a native European aster that has been previously used in diversity-invasibility experiments in North America. We also conducted a field survey to explore the generality of the patterns generated from our experimental study. Both experimental and observational work revealed that increasing diversity reduced the performance of alien but not native invaders. Centaurea stoebe invading its native community performed poorly regardless of resident diversity, whereas in a parallel, previously published study conducted in North America, C. stoebe easily invaded low-diversity but not highdiversity assemblages. Our results suggest that diversity is an attribute of resident communities that makes them more or less susceptible to invasion by novel invasive alien but not native plant species.

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Section: Introductionmentioning

confidence: 99%

Origin Matters: Diversity Affects the Performance of Alien Invasive Species but Not of Native Species

Sun

Maron

Schaffner

2015

The American Naturalist

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“…Recent studies suggest that competitive interactions between resident species with a shared evolutionary history may well differ from those between resident and invasive alien plant species, with old neighbors more strongly suppressing an "invader" than novel neighbors ( Callaway et al, 2011 ;Sun et al, 2013 ). Hence, a biogeographic approach would not only allow a determination of how diversity affects community resistance but also whether this relationship varies depending on whether the community is evolutionarily "naive" or shares a coevolutionary history with the invader.…”

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confidence: 99%

Biogeographic effects on early establishment of an invasive alien plant

Sun

Maron

Schaffner

2015

American J of Botany

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• Premise of the study: Biotic resistance is often studied in the context of how interactions between native biota and invading species influence the success of those invaders. Seldom, however, is the strength of “resistance” compared biogeographically, where the ability of a species to impede invader establishment is contrasted between an invader's native and introduced recipient community.• Methods: We conducted an experiment to examine how community diversity influences seedling recruitment of a plant invader where it is native and contrasted with results previously published from introduced ranges. In Switzerland, we created recipient communities that varied in species and functional richness and invaded them, or not, with seeds of Centaurea stoebe, a native European plant that has been previously used in an identical experiment in North America, where it is a prominent invader.• Key results: The biogeographic comparison revealed that the recipient community largely prevented C. stoebe seedling establishment at home (Switzerland), but not away (Montana, USA), and that diversity of the resident vegetation did not contribute to the effects observed in the introduced range.• Conclusions: Our results provide evidence that differences in the biogeographic conditions and/or overall level of competition of resident community between the native and introduced range considerably suppresses seedling recruitment of the invasive plant, rather than resident diversity itself. In the case of C. stoebe, the surprisingly low establishment success in the experiments conducted in the native compared with the introduced range is likely to be influenced by the higher level of competition with resident community, by abiotic environmental conditions or interactions between these two factors in the native range. Release from factors suppressing seedling recruitment at home may contribute to the successful invasion of C. stoebe in North America.

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“…Similarly, other biogeographic studies comparing performance of plant species native to temperate grasslands in Eurasia and invasive in the prairies in North America revealed that the average cover of the co-occurring vegetation is lower in the introduced than in the native range (Callaway et al 2011;Alba and Hufbauer 2012;Hinz et al 2012). In a neighbour removal experiment, Callaway et al (2011) detected higher competitive effects of the surrounding vegetation on Centaurea stoebe L. growth and reproduction in its native European range compared to its invaded US range. Our results are in line with these findings, suggesting that reduced interspecific competition in the introduced range may contribute to the increased performance and density of L. vulgare.…”

Section: Comparison Of L Vulgare In Europe and North Americamentioning

confidence: 75%

“…Theoretically, exotic plants that experience high herbivore attack in their native range are more likely to escape top-down regulation and become invasive in the introduced range than plant species that experience only low levels of herbivory in their native range. Beside an escape from natural enemies, invasive plants may also profit from a release from competition with neighbouring plants (Crawley 1986;Callaway et al 2011) or from more favourable climatic conditions in the introduced ranges (Erfmeier and Bruelheide 2004;Cripps et al 2010). To gather support for any of these mechanisms that might explain invasion success, it is necessary to apply a biogeographic approach by comparing invasive plants in their native and introduced ranges (Hierro et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Can enemy release explain the invasion success of the diploid Leucanthemum vulgare in North America?

et al. 2016

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Enemy release is a commonly accepted mechanism to explain plant invasions. Both the diploid Leucanthemum vulgare and the morphologically very similar tetraploid Leucanthemum ircutianum have been introduced into North America. To verify which species is more prevalent in North America we sampled 98 Leucanthemum populations and determined their ploidy level. Although polyploidy has repeatedly been proposed to be associated with increased invasiveness in plants, only two of the populations surveyed in North America were the tetraploid L. ircutianum. We tested the enemy release hypothesis by first comparing 20 populations of L. vulgare and 27 populations of L. ircutianum in their native range in Europe, and then comparing the European L. vulgare populations with 31 L. vulgare populations sampled in North America. Characteristics of the site and associated vegetation, plant performance and invertebrate herbivory were recorded. In Europe, plant height and density of the two species were similar but L. vulgare produced more flower heads than L. ircutianum. Leucanthemum vulgare in North America was 17 % taller, produced twice as many flower heads and grew much denser compared to L. vulgare in Europe. Attack rates by root-and leaf-feeding herbivores on L. vulgare in Europe (34 and 75 %) was comparable to that on L. ircutianum (26 and 71 %) but higher than that on L. vulgare in North America (10 and 3 %). However, herbivore load and leaf damage were low in Europe. Cover and height of the co-occurring vegetation was higher in L. vulgare populations in the native than in the introduced range, suggesting that a shift in plant competition may more easily explain the invasion success of L. vulgare than escape from herbivory.

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Escape from competition: Neighbors reduceCentaurea stoebeperformance at home but not away

Cited by 70 publications

References 40 publications

Origin Matters: Diversity Affects the Performance of Alien Invasive Species but Not of Native Species

Origin Matters: Diversity Affects the Performance of Alien Invasive Species but Not of Native Species

Biogeographic effects on early establishment of an invasive alien plant

Can enemy release explain the invasion success of the diploid Leucanthemum vulgare in North America?

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