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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Invasive species in the United States ： ウィキペディア英語版 Invasive species in the United States Invasive species are a significant threat to many native habitats and species of the United States and a significant cost to agriculture, forestry, and recreation. The term "invasive species" can refer to introduced or naturalized species, feral species, or introduced diseases. Some species, such as the dandelion, while non-native, do not cause significant economic or ecologic damage and are not widely considered as invasive. Overall, it is estimated that 50,000 non-native species have been introduced to the United States, including livestock, crops, pets, and other non-invasive species. Economic damages associated with invasive species' effects and control costs are estimated at $120 billion per year.〔David Pimentel, Rodolfo Zuniga, Doug Morrison. Update on the environmental and economic costs associated with alien-invasive species in the United States. Ecological Economics. 52 (2005) 273-288.〕 ==Notable invasive species== For a more complete list of invasive species, see List of invasive species in North America 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Invasive species in the United States」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.