3/28/2023 0 Comments Swimmers itch wisconsin 2020![]() Eurasian watermilfoil is known to hybridize with the native northern watermilfoil ( M. Eurasian WatermilfoilĮurasian watermilfoil ( Myriophyllum spicatum or spiked watermilfoil) is native to Europe, Asia, and North Africa, but has a wide geographic and climatic distribution among some 57 countries, extending from northern Canada to South Africa. This brief plan describes the nature of the threat and suggests steps that could be taken in the short and long term to control it. As yet, we have not found EWM in North Lake Leelanau. Although a complete survey documenting the extent of the infestation in both the northern and southern portions of Lake Leelanau has not yet been completed, a preliminary drone survey suggests that the largest infestation is along the east shore of South Lake Leelanau and a smaller infestation on the south side of the Narrows. It prefers still or slow-moving water and is considered to be a highly invasive species. This determination was confirmed conclusively earlier this month by Brian Price, biologist for the Lake Leelanau Lake Association and former Executive Director of the Leelanau Conservancy, and Jeff Sanborn, immediate past president of the Lake Leelanau Lake Association (LLLA).Įurasian watermilfoil is a rooted, submerged aquatic plant that grows in water from two to 30 feet deep, but most commonly in Lake Leelanau at depths of 8-12 feet. One of the most aggressive and noxious invasive species of aquatic weed found in North American lakes, Eurasian watermilfoil (EWM), has established itself in Lake Leelanau. Click here to read or download our 2021 EWM Field Report. The report also describes how underwater ROV photography is being used to track native aquatic vegetation affected by EWM and ortho-mosaic aerial drone photography to map out additional EWM infestations for treatment in 2022 and beyond. ![]() The 32-page report, which contains many maps and photographs, describes how LLLA and GTB succeeded in greatly reducing large and dense beds of EWM in South Lake Leelanau, using three methods with varying degrees of success. The Field Report of the EWM remedial activities conducted by our Association and the Grand Traverse Band of Ottawa and Chippewa Indians (GTB) in 2021 is now available on our website.
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