Contaminants in the San Francisco Bay-Delta: Novel Tools and Approaches to Evaluate Effects of Multiple Stressors - January 31, 2017

UC Davis

Student Community Center - Multipurpose Room

Time:  8:30 am - 5:00 pm

Free and open to the public

Click HERE to view the recording of the seminar speakers.

Symposium Planning Committee:   Richard Connon, Symposium Chair, (UCD), Gary Cherr (UC Davis), Simone Hasenbein (UC Davis), Shauna Oh (UC Davis), Anne Todgham (UC Davis), Andrew Whitehead (UC Davis), Marina Brand (Delta Science Program), Nir Oksenberg (Delta Science Program), Carol Atkins (State Water Resources Control Board)

Sponsors:  Delta Stewardship Council: Delta Science Program (DSP), UC Davis Coastal and Marine Sciences Institute (CMSI), and the State Water Resources Control Board (SWRCB).

Summary:

Chemicals in the aquatic environment occur as complex mixtures, interacting with multiple stressors. These variables elicit multiple responses at multiple levels of biological organization, which further vary with species ontogeny.  Contaminants originate from agricultural and urban runoff, wastewater treatment effluent discharge, industrial waste, historical byproducts of mining, atmospheric deposition, and oil spills. The Bay-Delta is also home to several legacy contaminants that are known to accumulate through the food web leading to health risks for humans and wildlife.  The linkage between source contamination, exposures in the river and delta, and the potential impacts in the SF estuary and coastal zone are critical for understanding effects on migratory fish in addition to fate and transport.

The complexity of multiple stressors in the California Delta, San Francisco Estuary, and nearshore costal ecosystems is no exception, and their impact on aquatic species should be comprehensively evaluated. Monitoring for chemicals without evaluating their combined effects doesn’t adequately characterize exposure risks. Studies have demonstrated that environmentally relevant concentrations of contaminants elicit numerous sublethal effects (e.g., behavioral impairment, decreased growth, decreased reproductive output, intersexed organisms) that lead to effects observed at population, community and ecosystem levels. 

Weight of evidence approaches are needed to make linkages among sublethal cellular/tissue, whole organism, populations, and community effects. The US EPA has proposed a framework whereby causal linkages among molecular interactions, cellular responses, and organism responses that could then lead to population responses.

This day-long symposium aims to inform scientists and managers on the status of effect-based novel tools and approaches developed for toxicological studies, and how their use can be integrated to evaluate impacts of multiple stressors on the San Francisco-Bay Delta ecosystem.

DRAFT AGENDA

8:30           CHECK-IN

8:45 – 8:55      WELCOME

                 RICHARD CONNON, UC Davis Coastal and Marine Sciences Institute

                 RAINER HOENICKE, Delta Stewardship Council, Delta Science Program

8:55 – 10:30     THEME 1:  CURRENT CHALLENGES

8:55 – 9:00      MODERATOR: RICHARD CONNON (UC DAVIS)

9:00 – 9:20      Tomorrowland: The changing face of contaminants and monitoring in California

               RICHARD BREUER (SWRCB)

9:20 – 9:40      Current-use pesticide mixtures in the San Francisco Bay/Delta

               JAMES ORLANDO (USGS)

9:40 – 10:00          Policy and management challenges related to chemical contaminants in the Delta

                             TRACY COLLIER (DSP-ISB)                            

10:00 – 10:20       Stormwater runoff, complex chemical mixtures, and coho spawner mortality in urban watersheds

                             NAT SCHOLZ (NOAA FISHERIES)

10:20 – 10:30       Q&A ALL PRESENTERS

10:30 – 10:45    BREAK

10:45 – 11:50    THEME 2:  TOOLS AND APPROACHES (PART I)

10:45 – 10:50    MODERATOR: ANDREW WHITEHEAD (UC DAVIS)

10:50 – 11:10      PhyloToxicology: breaking the artificial divide between human- and eco-toxicology

                            JOHN COLBOURNE (UNIVERSITY OF BIRMINGHAM)

11:10 – 11:30      Biodiversity genomics for environmental assessment and monitoring

                            MEHRDAD HAJIBABAEI (UNIVERSITY OF GUELPH)

11:30 – 11:50      Binding and inhibition of P-glycoprotein by persistent pollutants

                            AMRO HAMDOUN (UCSD)

11:50 – 1:10     LUNCH

1:10 – 2:05      THEME 2: TOOLS AND APPROACHES (PART II)

1:10 – 1:15      MODERATOR: ANDREW WHITEHEAD (UC DAVIS)

1:15 – 1:35      New molecular indicators for adverse impacts of oil spills in fish

               JOHN INCARDONA (NOAA FISHERIES)

1:35 – 1:55           Supporting decision making through biological effects based monitoring of chemical stressors in water bodies

                             in the Great Lakes Region

                             ED PERKINS (U.S. ARMY CORPS OF ENGINEERS)

1:55 – 2:05      Q&A ALL PRESENTERS

2:05 – 2:20           BREAK

2:20 – 3:55      THEME 3:  PUTTING ECOLOGY (BACK) INTO ECOTOXICOLOGY

2:20 – 2:25      MODERATOR: GARY CHERR (UC DAVIS)

2:25 – 2:45           Menidia beryllina as a model for estuarine health

                             NANCY DENSLOW (UNIVERSITY OF FLORIDA)

2:45 – 3:05      Developing mechanism-based biomarkers to assess the risk from multiple chemical exposures in fish

               EVAN GALLAGHER (UNIVERSITY OF WASHINGTON)

3:05 – 3:25       Using Adverse Outcome Pathways to characterize mixture interactions of San Francisco Bay Delta contaminants

                             on fish feminization and the potential impact of climate change as a non-chemical stressor

               DAN SCHLENK (UCR)

3:25 – 3:45      The role of the microbiome in susceptibility to chronic pesticide exposure

               JAMES BEN BROWN (LAWRENCE BERKELEY NATIONAL LAB)

3:45 – 3:55      Q&A ALL PRESENTERS

4:00 – 5:00      PANEL DISCUSSION

4:00 – 4:05      MODERATOR: ANNE TODGHAM (UC DAVIS)

               XIN DENG, CA DEPARTMENT OF PESTICIDE REGULATION

               GREGG ERICKSON, CA DEPARTMENT OF FISH & WILDLIFE

                      RICHARD BREUER, STATE WATER RESOURCES CONTROL BOARD

                             JOHN KENNETH COLBOURNE, UNIVERSITY OF BIRMINGHAM

                             NANCY DENSLOW, UNIVERSITY OF FLORIDA

                             MEHRDAD HAJIBABAEI, UNIVERSITY OF GUELPH

                             ED PERKINS, U.S. ARMY CORPS OF ENGINEERS