Herbivory on invasive exotic plants and their non-invasive relatives

被引:45
|
作者
Jogesh, Tania [1 ]
Carpenter, David [1 ]
Cappuccino, Naomi [1 ]
机构
[1] Carleton Univ, Dept Biol, Ottawa, ON K1S 5B6, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Enemy Release Hypothesis; alien plants; herbivory; generalist herbivores; defensive chemistry;
D O I
10.1007/s10530-008-9236-z
中图分类号
X176 [生物多样性保护];
学科分类号
090705 ;
摘要
The Enemy Release Hypothesis links exotic plant success to escape from enemies such as herbivores and pathogens. Recent work has shown that exotic plants that more fully escape herbivores and pathogens are more likely to become highly invasive, compared to plants with higher enemy loads in their novel ranges. We predicted that highly invasive plants from the Asteraceae and the Brassicaceae would be less acceptable, in laboratory no-choice feeding trials, to the generalist herbivore the American grasshopper, Schistocerca americana. We also compared herbivory on invasive and non-invasive plants from the genus Centaurea in no-choice feeding trials using the red-legged grasshopper Melanoplus femurrubrum and in a common garden in the field. In accordance with our predictions, highly invasive plants were fed on less by grasshoppers in the laboratory. They also received less damage in the field, suggesting that they contain feeding deterrents that render them less acceptable to generalist herbivores than non-invasive plants.
引用
收藏
页码:797 / 804
页数:8
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