Primary Production is food for the animals in the Bay.

• Microscopic algae are food for microscopic animal plankton.
• Animal plankton are food for small fish and animals (clams, worms, crabs).
• Small fish and animals are eaten by larger and larger fish, by birds, or by humans.

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The URL of this page is http://sfbay.wr.usgs.gov/access/ColeCloern/FoodPyrmd.html
Pages created and maintained by Laura Zink Torresan
Last modified: 2 April 1997