= Plankton
{wiki}
<Plankton> are aquatic <organisms> whose large-scale movement is strongly influenced by <water> currents. The group is defined by ecological mode rather than a single evolutionary origin: <phytoplankton> include photosynthetic forms, whereas <zooplankton> include drifting <consumers>.
Many <plankton> can swim locally or change depth, so drifting does not mean complete immobility. Vertical movement can change access to <light>, <nutrients> and <predators>, linking behaviour to transport by currents and to an aquatic <food web>.
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