What would happen if there was no plankton?

There would be a mass extinction on a scale not seen since the end of the Permian. Plankton is the base of the food chain, meaning everything from barnacles to great white sharks depend on it either directly or indirectly for food. read more

Plankton is the base of the food chain, meaning everything from barnacles to great white sharks depend on it either directly or indirectly for food. If plankton disappeared suddenly, it would take a few months for the chain of starvation to work the entire way up to animals like sharks, but it would happen fast. read more

), Many species of fish, especially the juveniles, feed on the zooplankton (microscopic animals) or on the phytoplankton (algae and bacteria). read more

Disappearance of plankton would certainly affect the food chain, but there's another problem if the phytoplankton were to disappear: they provide about a third to a half of the atmosphere's oxygen. read more