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Didymo Resources

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Pennsylvania Fish and Boat Commission.

See also: Aquatic Invasive Species for more action plans

Otago Regional Council (New Zealand).
Virginia Department of Game and Inland Fisheries.

University of California - Riverside. Center for Invasive Species Research.

West Virginia Department of Natural Resources.
Pennsylvania State University. Pennsylvania Sea Grant.
See also: Aquatic Invasive Species: Resources for additional species information

DOCNOAA. Great Lakes Environmental Research Laboratory; DOIUSGS. Wetland and Aquatic Research Center.

IUCN. Species Survival Commission. Invasive Species Specialist Group.
University of Minnesota. Minnesota Sea Grant. Seiche Newsletter.
Pennsylvania Department of Conservation and Natural Resources.
See also: Invasive Plant Fact Sheets for plant species (trees, shrubs, vines, herbs and aquatic plants) that have impacted the state's natural lands

Maryland Department of Natural Resources.

Northeast Aquatic Nuisance Species Panel.

New York Invasive Species Clearinghouse.

New York Department of Environmental Conservation.

Google. YouTube; Montana Fish, Wildlife, and Parks.

Google. YouTube; Fish and Game New Zealand.