Aquatic macrophytes and selected physical properties of Shingobee and Williams lakes, Minnesota, 1991-92

This report summarizes data collected on the species composition and biomass of aquatic macrophytes in the floating-leafed and submersed aquatic zones of Shingobee and Williams Lakes in Minnesota. Plant species were identified and sampled on transects in each lake in August of 1991, and dry weights were determined for all samples. Nutrient contents were analysed for selected species. Data also were collected on the composition of species in the emergent zone of both lakes in June and August 1992. Light penetration was measured with an underwater spectroradiometer in August 1991. Hypsographic data were obtained and depth-volume calculations were made for both lakes.