Wikipedia:POTD row/February 21, 2006

SeaWiFS Global Biosphere September 1997 - August 1998 Primary production is the production of biological organic compounds from inorganic materials through photosynthesis or chemosynthesis. Organisms that can create biomass in this manner (notably plants) are known as primary producers, and form the basis of the food chain. In oceanography and limnology the primary producers in aquatic environments are phytoplankton utilizing energy from sunlight. [enlarge image]

Photo credit: SeaWiFS Project, NASA
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