Who is primarily responsible for the breakdown of organic matter in freshwater habitats?

The primary responsibility for the breakdown of organic matter in freshwater habitats rests with decomposers. Decomposers, such as bacteria and fungi, play a crucial role in the ecosystem by breaking down dead organic material, including plants and animal remains. This decomposition process recycles nutrients back into the ecosystem, making them available for producers—such as algae and aquatic plants—to utilize for growth.

Decomposers also help maintain the health and balance of freshwater ecosystems by preventing the buildup of organic waste and contributing to soil and water quality. Without these organisms, organic matter would accumulate, ultimately disrupting the flow of energy and nutrients within the ecosystem. Thus, the function of decomposers is essential for sustaining life and promoting biodiversity in freshwater environments.