[20210104]IF11666_美国陆军工程兵团入侵物种工作.pdf

https:/crsreports.congress.gov Updated January 4, 2021U.S. Army Corps of Engineers Invasive Species EffortsAn invasive species is a nonnative species that does or is likely to cause economic or environmental harm or harm to human health. Invasive species impact terrestrial and aquaticincluding marine and freshwatersystems. As society has become more connected, opportunities for the spread of invasive species have increased (e.g., navigation activities can transport species and introduce them to multiple different watersheds and waterbodies). After introduction, invasive species may become established and spread; it can be costly and difficult (or impossible, in some cases) to control or eradicate them. Many federal and nonfederal agencies managing land and water undertake efforts to prevent the introduction and spread of invasive species or, upon detection of an invasive species, devote resources to control and eradication efforts. For more information on invasive species, see CRS In Focus IF11011, Invasive Species: A Brief Overview. The U.S. Army Corps of Engineers (USACE), part of the Department of Defense, develops and maintains civil works projects in the United States princip