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Workshop on Bacteria Research in Five Marin and Sonoma County Estuaries

We are monitoring Bacterial Sources and Transport in Five Northern California Estuaries. Please join us for a Workshop on bacteria research in five Marin and Sonoma County estuaries at North Coast Regional Water Quality Control Board, DCJ Room Santa Rosa, California Tuesday September 19, 2006 9:00 am –12:00 pm.

We sampled water, suspended solids, and sediment across the freshwater-saltwater transitio three water samples one sediment sample leftright middle n zone at each estuary ten times from August 2004 to June 2005. Samples were analyzed for fecal coliform and E. coli, DNA fingerprinting is also being used to differentiate bacterial populations in estuary sediment, suspended solids, and water fractions. Our results provide water quality sampling and monitoring programs with a context for the interaction between sediment andfreshwater sources of bacteria, as well as salinity and seasonal influences on bacterial levels.

We look forward to discussing with you our results, the relationship between sediment and water column bacteria, and methods for statistical analysis. There is a map of the Russian River Estuary with the five sampling transectlocations. Each transect consists of three sampling locations (right, middle, and left) from which three water samples and one sediment sample were collected.

University of California Agriculture & Natural Resources Cooperative Extension Sonoma County 133 Aviation Blvd., Rm. 100 Santa Rosa, CA 95403-2810 Tel. (707) 565-262, Fax (707) 565-2623

Presenters: E. Robert Atwill, UCCE Specialist, DVM, Ph.D. David J. Lewis, UCCE Watershed Management Advisor