What is the primary function of aquatic plants in freshwater systems?

The primary function of aquatic plants in freshwater systems is oxygen production through photosynthesis. During photosynthesis, aquatic plants absorb carbon dioxide and release oxygen as a byproduct, which significantly contributes to the oxygen levels in the water. This process is essential for the survival of various aquatic organisms, particularly fish and invertebrates, that rely on dissolved oxygen in the water for respiration.

While water filtration, providing habitat for fish, and supporting nutrient cycling are important roles that aquatic plants also fulfill, oxygen production is fundamental to maintaining the health of freshwater ecosystems. The oxygen generated by these plants supports aerobic processes crucial for sustaining diverse aquatic life, making this function a primary and critical aspect of their role in these environments.