The researchers studied the relationship between small water creatures and plants in Nguru Lake. They collected samples of water and sediment for a year and found seven different types of small creatures living there. They also looked at the water's characteristics. They discovered that areas with a lot of plants had fewer small creatures compared to areas with fewer plants. The small creatures found in this study were different from those found in the lake in 1997, and there weren't many different types of creatures living there.