The uncommon deepwater plant communities include 10 species of moss, two species of stoneworts, and two species of liverworts. These communities support endemic and native invertebrate communities that likely play an important role in processing nutrients and carbon at the bottom of the lake. Endemic species include deepwater stonefly, and two species of blind amphipod. Human and environmental drivers of distribution and abundance of deepwater plants are likely the same as those driving cultural eutrophication and changes in water transparency in the lake (i.e., suspended particles, atmospheric deposition, nutrient loading, urban development, and local/regional climate change). The introduction of nonnative species including mysid shrimp, warmwater fish, signal crayfish may drive plant bed density through direct consumption of plant material. Actions taken to improve water transparency are also likely to improve conditions for deep water plant bed spatial and depth extent. There is no regular monitoring of deepwater plant communities but monitoring of existing beds at regular intervals could provide useful information about the status and trend of known deepwater plant communities.