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Case Studies
Water Management Associations
Invasive Water Lettuce and Water Hyacinth a Major Concern
Last October, water lettuce and water hyacinth were found in Lake Onalaska, both highly invasive aquatic species that can spread very quickly. Through the efforts of agencies, local conservation groups and volunteers, the plants were swiftly removed from approximately 3.5 miles of shoreline both north and south of Fred Funk Landing.

This was the third instance of these plants being found in the upper Mississippi River. In 2011, water hyacinth and water lettuce were discovered in a dozen locations in Pool 5 near Buffalo City, Wisconsin, and in 2012 a large infestation of nearly 10,000 plants was discovered in a secluded backwater bay.

People who use the river, Lake Onalaska or any public waterways are urged be diligent in their efforts to not transport invasive and/or exotic species. People should take steps including removing vegetation from boat trailers, emptying bait buckets on land, pulling drain plugs and never releasing anything from home into the wild.

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Biofoulers Global Management Costs the US $277 Million Annually - Biofoulers are organisms that accumulate underwater on hard surfaces, to the detriment of property and economically important activities, such as shipping, power generation, and water treatment. While plants and algae can act as freshwater biofoulers, the study focused on the impact of animals. Eleven groups known to cause problems were investigated, among them mussels, clams, snails, crustaceans, sponges, and insects.

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