Overview

In 2009, the RMP began revising the mesohaline benthic tools for San Francisco Bay. A standardized benthic dataset for San Francisco Bay was reviewed, classification analysis of benthic assemblage data has now been performed; and a best professional judgment exercise commenced. The results of the best professional judgment can be found here. In 2012, the mesohaline index for the Estuary will be developed

Applicable RMP Management Questions

  • Are chemical concentrations in the Estuary potentially at levels of concern and are associated impacts likely?
    1. Which chemicals have the potential to impact humans and aquatic life and should be monitored?
    2. What potential for impacts on humans and aquatic life exists due to contaminants in the Estuary ecosystem?
    3. What are appropriate guidelines for protection of beneficial uses?

Approach

Two existing benthic indices (IBI, RBI) have been previously applied to the mesohaline habitats in the Estuary, and two others (RIVPACS and BRI) are available for testing. These existing mesohaline indices will be evaluated using a standardized dataset of benthic macrofauna data in the Estuary, and index formulations tested. Results from the best professional judgment gradient in the 2009 effort will be used as the benchmark for the mesohaline index performance.