Plant invasions, generalist herbivores, and novel defense weapons

Schaffner U, Ridenour WM, Wolf VC, Bassett T, Müller C, Mueller-Schaerer H, Sutherland S, Lortie CJ, Callaway RM (2011)
Ecology 92(4): 829-835.

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Abstract
One commonly accepted mechanism for biological invasions is that species, after introduction to a new region, leave behind their natural enemies and therefore increase in distribution and abundance. However, which enemies are escaped remains unclear. Escape from specialist invertebrate herbivores has been examined in detail, but despite the profound effects of generalist herbivores in natural communities their potential to control invasive species is poorly understood. We carried out parallel laboratory feeding bioassays with generalist invertebrate herbivores from the native (Europe) and from the introduced (North America) range using native and nonnative tetraploid populations of the invasive spotted knapweed, Centaurea stoebe. We found that the growth of North American generalist herbivores was far lower when feeding on C. stoebe than the growth of European generalists. In contrast, North American and European generalists grew equally well on European and North American tetraploid C. stoebe plants, lending no support for an evolutionary change in resistance of North American tetraploid C. stoebe populations against generalist herbivores. These results suggest that biogeographical differences in the response of generalist herbivores to novel plant species have the potential to affect plant invasions.
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Schaffner U, Ridenour WM, Wolf VC, et al. Plant invasions, generalist herbivores, and novel defense weapons. Ecology. 2011;92(4):829-835.
Schaffner, U., Ridenour, W. M., Wolf, V. C., Bassett, T., Müller, C., Mueller-Schaerer, H., Sutherland, S., et al. (2011). Plant invasions, generalist herbivores, and novel defense weapons. Ecology, 92(4), 829-835.
Schaffner, U., Ridenour, W. M., Wolf, V. C., Bassett, T., Müller, C., Mueller-Schaerer, H., Sutherland, S., Lortie, C. J., and Callaway, R. M. (2011). Plant invasions, generalist herbivores, and novel defense weapons. Ecology 92, 829-835.
Schaffner, U., et al., 2011. Plant invasions, generalist herbivores, and novel defense weapons. Ecology, 92(4), p 829-835.
U. Schaffner, et al., “Plant invasions, generalist herbivores, and novel defense weapons”, Ecology, vol. 92, 2011, pp. 829-835.
Schaffner, U., Ridenour, W.M., Wolf, V.C., Bassett, T., Müller, C., Mueller-Schaerer, H., Sutherland, S., Lortie, C.J., Callaway, R.M.: Plant invasions, generalist herbivores, and novel defense weapons. Ecology. 92, 829-835 (2011).
Schaffner, Urs, Ridenour, Wendy M., Wolf, Vera C, Bassett, Thomas, Müller, Caroline, Mueller-Schaerer, Heinz, Sutherland, Steve, Lortie, Christopher J., and Callaway, Ragan M. “Plant invasions, generalist herbivores, and novel defense weapons”. Ecology 92.4 (2011): 829-835.
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15 Citations in Europe PMC

Data provided by Europe PubMed Central.

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Contrasting spatio‐temporal climatic niche dynamics during the eastern and western invasions of spotted knapweed in North America
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Reduced seed predation after invasion supports enemy release in a broad biogeographical survey.
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The evolution of increased competitive ability, innate competitive advantages, and novel biochemical weapons act in concert for a tropical invader.
Qin RM, Zheng YL, Valiente-Banuet A, Callaway RM, Barclay GF, Pereyra CS, Feng YL., New Phytol. 197(3), 2013
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Impact of Acroptilon repens on co-occurring native plants is greater in the invader’s non-native range
Callaway RM, Schaffner U, Thelen GC, Khamraev A, Juginisov T, Maron JL., Biol. Invasions 14(6), 2012
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Community impacts of Prosopis juliflora invasion: biogeographic and congeneric comparisons.
Kaur R, Gonzales WL, Llambi LD, Soriano PJ, Callaway RM, Rout ME, Gallaher TJ, Inderjit ., PLoS ONE 7(9), 2012
PMID: 22984595

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