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Linkage of Bioaccumulation and Biological Effects to Changes in Pollutant Loads in South San Francisco Bay
by Michelle Hornberger, Samuel Luoma, Daniel Cain, Cynthia Brown, Robin Bouse, Francis Parchaso, Christopher Wellise, and Janet Thompson

 

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Clam/Source Relationship

Macoma balthica with it's siphon extended
Macoma balthica


Cu in macoma vs Cu load

Figure 1. Pointsource Influence. Copper loads from the PARWQP strongly influenced copper bioaccumulation.

Cu in M. balthica vs. precipitation

Zn in M. balthica vs. precipitation

Figure 2. Regional Influence. Both Cu and Zn concentrations in M. balthica strongly correlated to surrogate measures of urban run-off. These relationships were not evident prior to 1989, when the point-source dominated metal bioaccumulation.

 


U.S. Department of Interior, U.S. Geological Survey, Ecology and Contaminants Project
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