BEWARE! Invasive Algae Found In Popular Leech Lake Why does this matter, you may wonder? According to the DNR website, starry stonewort provides unsuitable shelter, food, and nesting habitats for native animals and inhibits water recreationists by creating dense mats at the water's surface. In summary, the invasive species cause recreational and ecological damage. Get our free mobile app Not only has the algae appeared in Leech Lake, but has now been confirmed in 18 of Minnesota's 11,842 lakes, including Cass Lake and Lake Winnibigoshish. It must be stopped! what can I do to stop the ...