Invasive Non-Native Species: Background and Issues for Congress

This report compares an approach based on a species-by-species assessment, vs. one based on pathways of entry. It also assesses the choice of an emphasis on prevention vs. post hoc control and intra-state quarantine. It describes existing federal laws and federal agency roles, federal interagency cooperation, and the federal interaction with state governments. Finally, it outlines effects, costs, and issues surrounding 47 selected harmful non-native species.