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- 1520568
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- 2022-6-4
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main point: the author describes the phenomenon of exotic species invasion in north America, raises subject needed to be explore and explain the foundation study and the purpose of the article.
structure:
p1. the success of immigration species and environmental impacts they brought to North American
(phenomenon summarize)2000 plants and 2000 insects immigrated into na and many of them became the pests of forest and agriculture, while as a group, exotic species constitute only 2% in fauna. ? (example to prove)a tree-feeding s causes more breakouts than native species. ? (problem)questions about how to manage existing species and concerns about further importation are timely. ? (action)what we should do is to understand the geological and climatic factors influencing the success of exotic species.
p2.there is no comprehensive study and the main point of this article
(status quo) substantial but piecemeal studies are not enough. ? no comprehensive theory of invasion ecology. BUT the plant-herbivore theory can help us understand the role of host plants & their communities in structuring & dynamics of forest insects. ? help understand some critical ecology factors underpinning the success of immigration herbivorous insects.(the particularity of conclusion)
the articles discuss that similarity of North America and Europe contribute to the interchange of insects while there are differences in geology, history and climate that establish the dominance of insects from Europe over those in North America.
new words:
inadvertent: 不经意的,无意中的
timely: 适时的
manifold: 繁多的
insidious: 潜伏的
piecemeal: 零碎的、
underpin: 巩固;构成xxx的基础
predispose: 使倾向于;使得感染 be predisposed to noun 容易xxx
geological: 地质的
than the reverse: 比较中非常好用的省略形式
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