## Encyclopedia > Plankton

Article Content

# Plankton

Plankton is the name given to all the microorganisms that drift and hover in the ocean and freshwater. The name comes from the Greek language $\pi\lambda\alpha\gamma\kappa\tau o\nu$ - term for "wanderer" or "drifter". If the organism has a method of propulsion, it is instead called nekton.

Plankton are divided into two classes:

Plankton concentration and distribution is very sensitive to chemical and physical changes in the sea water.

 See also larger images (http://www.ecoscope.com/ocean/index.htm); (photomontage by Uwe Kils) Hyperiid amphipod, Hyperia macrocephala (http://www.ecoscope.com/hyperia/index.htm) (Uwe Kils) Copepod (Calanoida) (Uwe Kils)

See also: algal bloom, domoic acid

All Wikipedia text is available under the terms of the GNU Free Documentation License

Search Encyclopedia
 Search over one million articles, find something about almost anything!

Featured Article
 Kinross Charter Township, Michigan ... As of the census of 2000, there are 5,922 people, 1,156 households, and 887 families residing in the township. The population density is 19.0/k ...