There are thousands of small lakes (<10 acres) across the state. They can exhibit diverse hydrological regimes, depths, substrates, alkalinity, and associated species. Soft bog lakes, hard bog lakes, meromictic lakes, and spring ponds are defined as small lake types. In the future, if sufficient data is gathered to accurately describe and categorize additional small lake types (e.g., small seepage lakes in central Wisconsin) they will be included.