In a lake environment, vegetation is everywhere. It's the trees in our yards and along our access roads, it's the plants in our gardens, and it's the grass in our lawns. In the lake iself, it's a wide variety of aquatic vegetation. All of it is a vital part of the ecosystem.
However, when something is not deemed to be desirable, it often gets a different name. For decades, parts of the Mississippi waterway were choked with aquatic vegetation that was therefore more commonly referred to as "weeds". In fact, one of the original functions of the Mississippi Lakes Association was managing weed growth, using a "weed cutter' specifically designed for that purpose. In the boom years of the timber business on the Mississippi, crews cut weeds in the lake and the channels, to permit the movement of log booms. The MLA is no longer engaged in weed cutting or removal.
One person's "Vegetation" is another's "Weeds"
Aquatic vegetation is vital to the health of the lake ecosystem. But, in some cases, this vegetation impacts on human ability to enjoy the lake. Some see this vegetation as "Good", and others see it as a nuisance. There is room to satisfy both sides of the argument, but as with all such issues, a reasonable balance must be struck. Please see this very informative 2018 article from MVCA explaining what can be done do achieve a peaceful co-existence.
More about aquatic vegetation:
There are many species of aquatic vegetation to be found in and around Mississippi Lake.
Check out these two handy guides to aquatic vegetation and algae:
From the Rideau Valley Conservation Authority: Algae and Aquatic Plant Education Manual
From the MLA, compiled by Jim Tye: Aquatic Plant Identification Booklet