Invasive Species Rule – NR 40 terminology

Invasive species that are not currently found in Wisconsin, with the exception of small pioneer stands of terrestrial plants and aquatic species that are isolated to a specific watershed in the state or the Great Lakes, but which, if introduced into the state, are likely to survive and spread, potentially causing significant environmental or economic harm or harm to human health.

Invasive species that are already established in the state and cause or have the potential to cause significant environmental or economic harm or harm to human health and include established nonnative fish and crayfish, fish in the aquaculture trade, fish in the aquarium trade and non-viable fish species.

Species that cannot be placed in other categories such as prohibited, restricted or non-restricted because they are not currently found in the state, appear to be invasive only regionally or their potential for invasiveness in Wisconsin is unknown. Not proposed to be regulated at this time.

Species that may have some beneficial uses, as well as negative impacts on the environment but are already integrated into Wisconsin's ecosystems so that control or eradication is not practical or feasible. Not proposed to be regulated at this time.

Species that we are not assessing for classification at this time, but plan to assess in future rule revisions. Not proposed to be regulated at this time.

Species Assessment Group

Wisconsin Council on Invasive Species