The vast open ocean is dominated by picoplankton that are efficiently grazed by ciliates and tintinnids.
The portion of plankton between 0.2 and 2 m in size made up of bacterial and eukaryotic phototrophs and heterotrophs is known as picoplankton. heterotrophic photosynthetic Both freshwater and marine habitats' microbial plankton populations contain a lot of them.
In the ocean and huge translucent lakes, the autotrophic picoplanktons are the main primary producers. Picocyanobacteria (Pcy), which can exist as single cells or microcolonies, are commonly found in lakes all over the world.
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