Algae serve a primary function in aquatic ecosystems through their role as primary producers. By photosynthesizing, they convert sunlight into energy, forming the foundation of the aquatic food web. Algae provide essential nutrients and oxygen for various aquatic organisms, supporting both consumer species and higher trophic levels. They also play a crucial role in maintaining water quality by absorbing excess nutrients from the water column. However, excessive nutrient loading can lead to harmful algal blooms, which can disrupt ecosystems and harm aquatic life. Thus, balance in algal populations is critical for ecosystem health.