NR 40.03 Note Note: For informational and educational purposes, the department informally maintains and updates as needed a caution list of invasive species and a list of non-restricted invasive species. Caution list invasive species are either not found in the state, or if they are, the extent of their presence or impact is not sufficiently documented. Caution list species may have shown evidence of invasiveness in similar environments in other states and could potentially spread in Wisconsin. Unlike the prohibited and restricted categories, caution list category invasive species are not regulated under this chapter. Additional information is needed to determine if caution list species belong in another category. Non-restricted invasive species may have adverse environmental, recreational or economic impacts or cause harm to human health. Most of the non-restricted species are already integrated into Wisconsin’s ecosystems, and state-wide control or eradication is not practical or feasible. Non-restricted category invasive species are not regulated under this chapter. All other non-native species recommended for listing as invasive but not yet assessed for this rule are put on an informal pending list. Future rule revisions will involve assessing some species from this list.

NR 40.03(2) (2) Criteria. The department shall consider the following criteria in classifying a nonnative species as an invasive species for the purpose of this chapter:

NR 40.03(2)(a) (a) The species’ potential to directly or indirectly cause economic or environmental harm or harm to human health, including harm to native species, biodiversity, natural scenic beauty and natural ecosystem structure, function or sustainability; harm to the long-term genetic integrity of native species; harm to recreational, commercial, industrial and other uses of natural resources in the state; and harm to the safety or well being of humans, including vulnerable or sensitive individuals.

NR 40.03(2)(b) (b) The extent to which the species is already present in the state, or in portions of the state, including whether there are isolated pioneer stands.

NR 40.03(2)(c) (c) The likelihood that the species, upon introduction, will become established and spread within the state.

NR 40.03(2)(d) (d) The potential for eradicating the species or controlling the species’ spread within the state, including the technological and economic feasibility of eradication or control.

NR 40.03(2)(e) (e) The socio-economic value afforded by the species, including any beneficial uses or values the species may provide for recreation, commerce, agriculture or industry within the state.

NR 40.03 History History: CR 08-074: cr. Register August 2009 No. 644, eff. 9-1-09.

NR 40.04 NR 40.04 Prohibited category.

NR 40.04(1) (1) Prohibited invasive species. Prohibited invasive species are identified in this section by scientific and common names and by specific categories of species.

NR 40.04(2) (2) Identification of prohibited species.

NR 40.04(2)(a) (a) Algae and cyanobacteria. The following algae and cyanobacteria invasive species are prohibited:

NR 40.04(2)(a)1g. 1g. Caulerpa taxifolia (Killer algae)

NR 40.04(2)(a)1r. 1r. Cylindrospermopsis raciborskii (Cylindro)

NR 40.04(2)(a)2. 2. Didymosphenia geminata (Didymo or rock snot), except in Lake Superior

NR 40.04(2)(a)3. 3. Nitellopsis obtusa (Starry stonewort)

NR 40.04(2)(a)4. 4. Novel cyanobacterial epiphyte of the order Stigonematales linked with avian vacuolar myelinopathy

NR 40.04(2)(a)5. 5. Prymnesium parvum (Golden alga)

NR 40.04(2)(a)6. 6. Ulva species, including species previously known as Enteromorpha species

NR 40.04(2)(b) (b) Plants. The following plant invasive species are prohibited statewide except in the counties listed where they are restricted under s. NR 40.05 (2) (b):

NR 40.04(2)(b)1e. 1e. Achyranthes japonica (Japanese chaff flower)

NR 40.04(2)(b)1m. 1m. Akebia quinata (Fiveleaf akebia or chocolate vine)

NR 40.04(2)(b)1s. 1s. Ampelopsis brevipedunculata (Porcelain berry) including the variegated cultivar

NR 40.04(2)(b)2. 2. Anthriscus sylvestris (Wild chervil) except in Adams, Barron, Chippewa, Crawford, Columbia, Dane, Dodge, Dunn, Fond du Lac, Grant, Green, Green Lake, Iowa, Jefferson, Juneau, Kenosha, La Crosse, Lafayette, Marquette, Milwaukee, Monroe, Ozaukee, Polk, Racine, Richland, Rock, Sauk, Sheboygan, Taylor, Vernon, Walworth, Waukesha, and Washington counties

NR 40.04(2)(b)2e. 2e. Arundo donax (Giant reed)

NR 40.04(2)(b)2m. 2m. Azolla pinnata (Mosquito fern)

NR 40.04(2)(b)2s. 2s. Berberis vulgaris (Common barberry)

NR 40.04(2)(b)3. 3. Bunias orientalis (Hill mustard) except in Dane, Grant, Green, Iowa, Lafayette, and Rock counties

NR 40.04(2)(b)4. 4. Cabomba caroliniana (Fanwort)