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Also: Lake St. Clair
  Curly-leaf Pondweed
in the Great Lakes Region

Overview | General Resources | Related Resources
Current invaders:
Crustaceans: Rusty Crayfish | Spiny Water Flea
Fish: Goby (Round) | Goby (Tubenose) | Rudd | Ruffe | Sea Lamprey | White Perch
Mollusks: Quagga Mussel | Zebra Mussel
Plants: Curly-leaf Pondweed | Eurasian Watermilfoil | Phragmites (non-native) | Purple Loosestrife
Viruses: Viral Hemorrhagic Septicemia Virus (VHSv)
Potential invaders:
Fish: Asian Carp

[Invasive species home page]

What's New
Invasive plants, fish threaten Great Lakes region
USA Today (7/9)
The first aquatic invasive species in the Great Lakes was the sea lamprey in the 1830s. Now more than 180 species are in the region, and 10 more are "knocking on the door," says a senior policy director for The Nature Conservancy.

Outdoors: Invasive flora needs to be rooted out from Michigan, too, not just fauna
Detroit Free Press (11/29)
While high-leaping Asian carp and water-clearing zebra mussels get the headlines, most invasive species aren't animals but are plants.

UW researchers say public more aware of invasive species effects
The Badger Herald (3/1)
Boaters and anglers around Wisconsin are more aware of the potentially detrimental effects of invasive species spreading between Wisconsin waterways and are actively taking preventative measures to stop their spread, a new survey said.

Fight against invasives remains fluid
Green Bay Press-Gazette (6/22)
June is Invasive Species Awareness Month in Wisconsin, and while aquatic invasives previously were limited to plants and animals, VHS has forced the state to talk about invasives as plants, animals and viruses.

Kawkawlin River treated for weeds, now clogged with lilies
The Bay City Times (9/9)
Water lilies have taken the place of aquatic weeds that were clogging the Kawkawlin River in Bay County, Michigan.

Curly-leaf pondweed turning lakes green
Duluth News Tribune (7/13)
More than 500 Minnesota lakes are choked with the invasive curly-leaf pondweed, which can be transported when fishermen don't clean off their boats before heading to a new lake.

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Curly-leaf pondweed (Potamogeton crispus) is an exotic plant that forms surface mats that interfere with aquatic recreation. The plant usually drops to the lake bottom by early July. Curly-leaf pondweed was the most severe nuisance aquatic plant in the Midwest until Eurasian watermilfoil appeared. It was accidentally introduced along with the common carp. It has been here so long, most people are not aware it is an exotic.
References: A Field Guide to Aquatic Exotic Plants and Animals, University of Minnesota Sea Grant Program

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General Resources
U.S. Fish and Wildlife Service
Adopt a conservation mentality: Protect our environment by not releasing unwanted fish and aquatic plants into the wild. Find out what you can do to help this growing problem on this site.

Invasive Plant Council of New York State
This group provides coordination and guidance on the management of invasive plants to protect biodiversity in New York State. Includes a list of the state's top 20 most invasive species, along with photos, and information on biology, range and habitat.

Restoring Spawning Areas of Muskellunge and Northern Pike
Illinois Natural History Survey
This article reports on a study, the object of which was to find the best substrate(s) for northern pike and muskellunge eggs. Curly Pondweed was one of the substrates studied. INHS Reports March-April 1995.

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Related Resources
GLIN: Agencies and Organizations, Flora
GLIN: Fish and Fisheries in the Great Lakes Region
GLIN: Plants of the Great Lakes Region

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Updated: December 13, 2017
Selected Photos: Copyright ©John and Ann Mahan
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