NOAA Mercury Bioaccumulation

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NOAA Mercury Bioaccumulation Monitoring in
South Florida David Evans NOAA National Centers
for Coastal Ocean Science
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REASONS TO MONITOR

• Inform Health or Fish Consumption Advisories
• Determine Current Status and Trends in
  Contamination
• Identify Locales of Concern - Hotspots
• Identify Pollution Sources for Control
• Inform Policy Decisions and Legislation
• Support Research to Understand Processes
  Determining Observed Patterns
• Parameterize, Test, Validate, or Modify Models
• Forecast Future Conditions

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Monitoring to Support the Comprehensive
Everglades Restoration Plan
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FRESHWATER SAMPLING SITES
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COASTAL MARINE SAMPLING SITES
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ASSESSMENT PARAMETER AND TARGET No
statistically significant (90-percent confidence
level) Increase In levels of mercury
bioaccumulation in tissue of fish, by association
fish eating wildlife, and in accordance with CGM
23 state water quality standards will be met.
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Mercury Concentrations Typically Increase With
Size And Age In Fish. This Requires Adjustment
If Different Distributions In Fish Size Are
Sampled Over Time Or Among Different Locales.
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Mercury in Sediments
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SUMMARY OF CRITICAL CONSIDERATIONS IN DEVELOPING
A MERCURY BIOACCUMULATION MONITORING PLAN

• Decide the purpose of monitoring at the beginning
• Know the characteristics of your estuary or
• ecosystem that are relevant to your purpose
• Know the characteristics of the species you are
• using as a sentinel
• Evaluate your sampling plan for its ability to
• successfully meet its purpose
• Consider what ancillary measurements will help
  you
• interpret your monitoring data
• Determine the spatial scale, frequency of
  sampling,
• and duration of your monitoring effort