Seasonal changes in the types and amounts of tiny plant-like organisms in Lake Baiyangdian, China were studied in 2005. The highest number of these organisms was found in spring, while the lowest was in autumn. Certain types of these organisms were more common in different seasons. The levels of nutrients in the lake were linked to the types of organisms present. The environment affected the makeup of these organisms in each season. The study used a method called Canonical Correspondence Analysis to understand how different factors influenced the community of these tiny organisms in the lake.