In aquatic systems, what role do filter feeders play?

Filter feeders play a crucial role in maintaining the health and balance of aquatic ecosystems primarily by controlling algae populations. By feeding on phytoplankton and suspended particulate matter, filter feeders help regulate the abundance of these organisms in the water column. This process can prevent excessive algal blooms, which can lead to issues such as decreased water quality and oxygen depletion.

In addition to controlling algae populations, filter feeders also contribute to nutrient cycling and sediment stabilization, although these functions are secondary to their role in managing algae. While some filter feeders may consume detritus, their primary function is not to recycle nutrients or provide oxygen directly. Instead, by keeping the algae populations in check, they indirectly contribute to overall ecosystem health and water clarity, benefiting other aquatic organisms.