Large zooplankton decrease the ecosystem's main productivity when they are abundant.

Name: Large zooplankton decrease the ecosystem's main productivity when they are abundant.
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Large zooplankton are grazers that feed on phytoplankton, which are the primary producers in the ecosystem. When large zooplankton are abundant, they can reduce the population of phytoplankton, which in turn reduces the ecosystem's primary productivity.

Large Zooplankton Decrease the Ecosystem's Main Productivity When They Are