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Outline. Spatial and Temporal Patterns in Food Web Accumulation: Bird Eggs. Five-year Plan for RMP Studies. Management context RMP objectives Specific questions for the next five years Priorities. Management Context. Many pollutants of concern are persistent and biomagnify

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Outline

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  1. Outline Spatial and Temporal Patterns in Food Web Accumulation: Bird Eggs Five-year Plan for RMP Studies • Management context • RMP objectives • Specific questions for the next five years • Priorities Draft data - do not cite or quote

  2. Management Context • Many pollutants of concern are persistent and biomagnify • Mercury, selenium, PCBs, dioxins, legacy pesticides, PBDEs Draft data - do not cite or quote

  3. Management Context • Piscivorous bird eggs are a valuable indicator for these contaminants • Widely used • High concentrations • Integration • over space • of the food web • over time • Link to • TMDL target • Effects thresholds • Easily collected, non-invasive • Great for archiving Draft data - do not cite or quote

  4. Management Context • Applicable regulatory guidelines • TMDLs • Recovery rate is critical information • RMP egg monitoring mentioned in mercury TMDL, food web uptake the foundation for Hg TMDL 2.0 • Long-term PCB bioaccumulation trends unclear • Different TMDLs for different regions • Antidegradation policy • Early detection of emerging contaminants, increasing concentrations of PBTs Draft data - do not cite or quote

  5. Previous RMP Work on Bird Egg Trend Monitoring • CISNET study (cormorant eggs) matching funds • Cormorant Pilot Study Draft data - do not cite or quote

  6. Other Work on Bird Egg Trend Monitoring • First CALFED Mercury Study • Second CALFED Mercury Study • USFWS tern Study – Hg, PCBs, dioxins, pesticides • USFWS clapper rail studies • 1990s cormorant studies • 1980s, 1990s tern and heron studies Draft data - do not cite or quote

  7. RMP Management Questions • Core Question 1. Are chemical concentrations in the Estuary at levels of potential concern and are associated impacts likely? • A. Which chemicals have the potential to impact humans and aquatic life and should be monitored? • Core Question 2. What are the concentrations and masses of contaminants in the Estuary and its segments? • A. Do spatial patterns and long-term trends indicate particular regions of concern? • Core Question 4. Have the concentrations, masses, and associated impacts of contaminants in the Estuary increased or decreased? • A. What are the effects of management actions on the concentrations and mass of contaminants in the Estuary? • B. What are the effects of management actions on the potential for adverse impacts on humans and aquatic life due to Bay contamination?

  8. Specific Questions to be Addressed in Next Five Years • Are cormorant and tern egg monitoring valuable indicators of long-term trends? • Which emerging contaminants accumulate to appreciable concentrations in the Bay’s open-water food web? • Are particular regions of the Bay margin of special concern for mercury accumulation in Forster’s terns? Draft data - do not cite or quote

  9. Cormorant Sampling Design • Triennial • 3 locations: Alviso (South Bay), Richmond Bridge, Wheeler Island (Suisun Bay) • Analytes: Hg, Se, PCBs, OCPs, dioxins, PBDEs, PFOS, other emerging contaminants • Compositing: 3 per location, 7 eggs in each • Wrinkles: Early breeding at Wheeler, Bridge painting Draft data - do not cite or quote

  10. Tern Egg Sampling Design • Wrinkles: could not get permit in 2008 • Triennial • 6 locations: based on nesting next year • Analytes: Hg, Se, PBDEs • Compositing: 3 per location, 7 eggs in each Draft data - do not cite or quote

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