Not much attention is paid to plankton because these creatures are usually hidden from sight. They are mostly microscopic in size and live in aquatic environments, but human lives are intricately connected with plankton.

The etymology of “plankton” originates from the ancient Greek word for “drifter.” Plankton refers to all organisms suspended in all types of waters (oceans, lakes, rivers and even groundwaters), including viruses, bacteria, insects, larval fish and jellyfish. Plankton come in many shapes and sizes, but what unites all of them is a tendency to drift with currents.

Read more: Small but mighty, plankton are some of the most powerful creatures on Earth

There are both plant (phytoplankton) and animal (zooplankton) types, as well as organisms that blur the line by belonging to both. These include carnivorous plants or photosynthesizing animals (mixoplankton).

We are an international group of researchers working on plankton that inhabit aquatic waters from high alpine lakes to the deep oceans. We represent a much larger consortium of researchers (the Plankton Passionates) who have recently considered all the ways in which plankton are crucial for human well-being, society, activity and life on our planet.

In our work, we have identified six broad themes that allow us to classify the value of plankton.

Plankton are integral to the ecological functioning of all aquatic environments. For example, phytoplankton use photosynthesis to create biomass that is transferred throughout the ecosystem, much as plants and trees do on land. Phytoplankton are mostly eaten by zooplankton, which are........

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