- UID
- 1126587
- 在线时间
- 小时
- 注册时间
- 2015-6-27
- 最后登录
- 1970-1-1
- 主题
- 帖子
- 性别
- 保密
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• BG: 2000 insects and 2000 plants invaded Noeth American
• Serious pests
○ 40% VS 2%
§ e.g. sawfly: outbreaks
• Manage and concern about continued importation
○ Insidious effects on structure and functioning of ecological systems
○ Research on climatic and ecological factors
○ No theory of invasion
§ Theory of plant-herbivore interactions
□ Critical factors
□ North American VS. Europe
® forest and faunal composition
® Hiotoriacal, geological and climatic differences
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