streams in watershed I experience substantially more algal blooms than those in watershed IV. Streams in watershed I experience substantially more algal blooms than those in watershed IV. A When precipitation varies, streams in watershed II experience the greatest fluctuations in water volume. When precipitation varies, streams in watershed II experience the greatest fluctuations in water volume. B Watershed III has the highest percentage of impervious surfaces. Watershed III has the highest percentage of impervious surfaces. C The water quality of streams in watershed IV is excellent because of the abundance of nutrients available to aquatic organisms. The water quality of streams in watershed IV is excellent because of the abundance of nutrients available to aquatic organisms. D Low dissolved oxygen is a severe problem in the streams in watershed I because of the inability of light to penetrate the forest canopy.