Plankton

Definition

Plankton are small, often microscopic organisms that drift in aquatic environments. They are crucial to marine ecosystems, serving as the primary producers and a food source for many marine animals.

5 Must Know Facts For Your Next Test

1. Plankton can be categorized into phytoplankton (plant-like) and zooplankton (animal-like).
2. Phytoplankton perform photosynthesis and produce a significant portion of Earth's oxygen.
3. Zooplankton feed on phytoplankton and other small particles in the water.
4. Plankton populations can fluctuate based on environmental factors such as temperature and nutrient availability.
5. Many protists are planktonic and play essential roles in carbon cycling and energy transfer in aquatic ecosystems.

Review Questions

Related terms

Phytoplankton:

Microscopic plant-like organisms that perform photosynthesis.

Zooplankton:

Tiny animal-like organisms that feed on phytoplankton and other small particles.

Protists:

A diverse group of eukaryotic microorganisms, some of which are planktonic.