What is the primary role of zooplankton in aquatic ecosystems?

The primary role of zooplankton in aquatic ecosystems is that of primary consumers. Zooplankton are small, often microscopic animals that feed on phytoplankton (the primary producers) and other organic matter in the water. By consuming phytoplankton, they play a crucial role in the transfer of energy from the primary producers to higher trophic levels, such as fish and other larger aquatic organisms.

In this context, their function is pivotal for the health and functioning of aquatic food webs. They serve as a key link in the food chain, converting the energy stored in phytoplankton into a form that can be utilized by larger organisms. This makes them essential for maintaining the balance of aquatic ecosystems. The feeding habits and abundance of zooplankton also influence nutrient cycling and the overall productivity of these ecosystems.