Lakes that are large (>10 acres), shallow (< 18 feet), hard (alkalinity > 50 ppm), and seepage have no inlet and outlet, and the main water source is from precipitation or runoff.
The macroalgae muskgrass (Chara spp.) dominates the submerged community of this lake type, along with a variety of pondweeds (Potamogeton spp.) and naiads (Najas spp.). Where nutrient levels are particularly high, more cosmopolitan species like coon-tail (Ceratophyllum demersum) can occur in moderate to high abundance. White and yellow water lilies (Nymphaea odorata and Nuphar variegata) are also often present in shallow waters. Associated fish species include golden shiner, black bullhead, yellow bullhead, bluegill, pumpkinseed, and largemouth bass.
