Primary production in San Francisco Bay in 1993 was equivalent to 2600 humpback whales.

This graphic shows how primary production varies dramatically between the major embayments of San Francisco Bay.

Return to "How Much?"

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