fish bioaccumulation studies associated with the kingston fly ash release marshall adams - oak ridge...
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Fish Bioaccumulation Studies Associated with the Kingston Fly Ash Release
Marshall Adams - Oak Ridge National LabTyler Baker - TVAAllison Fortner - ArcadisTerry Matthews and Mary McCracken - ORNL
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Presentation Outline
- Research objectives
- Study Design
- Results and major findings - causal relationships
- Relevance to overall fly ash project - integration with other studies
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Objectives of Bioaccumulation Studies
Determine if fly ash exposure is causing short and/or long-
term health effects on representative (sentinel) fish populations (tomorrows presentation)
Evaluate potential causal relationships between exposure to fly ash-associated metals and bioaccumulation in representative fish species
Assess spatial and temporal patterns of metal bioaccumulation in sentinel fish species
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Study Design
Fish Species SampledSpring - bluegill, largemouth bass, redear sunfish, and while crappie Fall - bluegill, largemouth bass, and channel catfish
Sample Frequency spring and fall each year since spring 2009
Metals Analyzed- ICP suite of 25 metals including selenium, arsenic, etc.- metals measured in fillets (muscle) from all fish, liver and ovaries (spring), whole body (shad)
Special Studies- whole body composite gizzard shad - reconstruction analysis on bluegill and LMB- trophic analysis on redear using stable isotopes
Sample Sites- 6-7 sample sites along downstream gradient of Emory and Clinch Rivers- includes 2 instream reference sites
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Bioaccumulation
25 metals + Hg
Fly Ash Spill
Exposure of Fish to Metals
Wholefish
Muscle Liver Ovary
Focus on sentinel species
- sunfish- bass
- catfish- crappie
Analysis of Fish Health
Assess Effects and Causality
(different trophic levels and home ranges)
Physio-logical
Repro-ductive
Histo-path
Bio-energetic
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CRM 1.5
CR
M 7
ERM 8 (Ref)
CRM 8ERM 0.9
ERM 3
Little Emory (Ref)
CRM 25.0 (ref)Ashspill
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Sentinel species for bioaccumulation and fish health studies
Bluegill- mid trophic level/omnivore- restricted home range
Largemouth bass- upper trophic level/predator- intermediate home range
Channel catfish- bottom feeder/omnivore- large home range
Gizzard Shad
Redear Sunfish
Types of StudiesBioaccumulation,fish health, and reconstruction analysis
Bioaccumulationand fish health
Bioaccumulation,fish health, and reconstruction analysis
Bioaccumulation, fishhealth, & trophic analysis(stable isotopes)
Bioaccumulation androle in food chain transfer of metals
- exclusive molluscavore- high site fidelity
- feeds on detritus & periphyton - large home range
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Selenium in Muscle Tissue, Fall 2010
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
Bluegill Sunfish Channel Catfish Largemouth Bass
Se m
g/kg
DW
ERM8.0 LERM2.0 ERM3.0 ERM0.9 CRM1.5 CRM8.0
Spatial Pattern
Ashspill Ash
spill
Refs
RefsRefs
Refs
Downstream
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Arsenic in Muscle Tissue, Fall 2010
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
Bluegill Sunfish Channel Catfish Largemouth Bass
As
mg/
kg D
W
ERM8.0 LERM2.0 ERM3.0 ERM0.9 CRM1.5 CRM8.0
Ash spill
Ash spill
Spatial Pattern
References below detection
Refs
Refs
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Reference Sites
EPA tier 1 action level for assessing toxicity of selenium on fish and birds
Ash spill
Temporal Pattern Selenium in Bluegill Muscle
1.00
2.00
3.00
4.00
5.00
6.00
7.00
8.00
ERM8.0 LERM2.0 ERM4.5 ERM3.0 ERM0.9 CRM1.5 CRM8.0 CRM25.0
Se m
g/kg
DW
Spring 2009
Fall 2009
Spring 2010
Fall 2010
EPA tier 1 action level for assessing toxicity of selenium on fish and birds
References
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2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.00
11.00
12.00
ERM8.0 LEM2.0 ERM3.0 ERM0.9 CRM1.5 CRM8.0
Se m
g/kg
dry
wt
Bluegil l
Redear
LM Bass
Wh Crappie
Selenium in Ovarian Tissue
EPA tier 2 action level for assessing toxicity of selenium on fish and birds
References
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Selenium in Largemouth Bass
1.50
2.00
2.50
3.00
3.50
4.00
4.50
ERM8.0 LERM2.0 ERM4.5 ERM3.0 ERM0.9 CRM1.5 CRM8.0 CRM25.0
Se m
g/kg
DW
Spring 2009
Fall 2009
Spring 2010
Fall 2010
References
Ash Spill
Temporal Pattern
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Temporal Pattern
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Selenium in whole body gizzard shad
References
Temporal Pattern
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References
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1.50
2.00
2.50
3.00
3.50
4.00
4.50
ERM8.0 LERM2.0 ERM4.5 ERM3.0 ERM0.9 CRM1.5 CRM8.0 CRM25.0
Se m
g/kg
DW
Spring 2009
Fall 2009
Spring 2010
Fall 2010
Selenium in Largemouth Bass (muscle)
Selenium in whole body Gizzard Shad
Range of Sein shad
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0
1
2
3
4
5
6
ERM 8 LERM 2 ERM 3 ERM 0.9 CRM 1.5 CRM 8
Composite Bioaccumulation Index (Fillets—integrates 4 species and 4 seasons)
Arsenic
Selenium
Co
mp
osi
te B
ioac
cum
ula
tio
n I
nd
ex
DOE Legacy
Sample Site
Positive control
Ash spill
References
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0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
ERM 8 LERM 2 ERM 3 ERM 0.9 CRM 1.5 CRM 8
Composite Bioaccumulation Index (Liver– integrates 3 species and 2 seasons)
Arsenic
Selenium
Co
mp
osi
te B
ioac
cum
ula
tio
n I
nd
ex
DOE LegacyPositive control
Sample Site
Ash spill
References
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Y = 2.1241Ln(x) + 0.0252
R2 = 0.8294Y = 0.6x + 0.4898
R² = 0.8089
0.00
0.50
1.001.50
2.00
2.50
3.00
3.504.00
4.50
5.00
0 2 4 6 8
Fillet mg/kg Se
Who
le b
ody
mg/
kg S
e
Combined
Log. (Combined)
Linear (Combined)
Relationship between selenium in fillet and whole bodyof bluegill based on reconstruction analysis
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Relevance and Application
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Ash
Periphyton
Adult mayflies
emergence
Piscivorous birds
Metals, detritus,periphyton
Treeswallow
GB heron Osprey
Mayflynymph
Sunfish
LM bass Shad
Racoon
Mussel
Integrated Aquatic Food Chain Studies
Frogs
Se+4Se-2
To periphyton
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Establishing causal relationships among environmental variables
Possible direct cause & effect relationship
Possible spatial correlations (indirect causality)
Birdbioaccumulation
BirdHealth
Fishbioaccumulation
FishHealth
Macroinvertbioaccumulation
Metals in other biota- turtles- amphibians- raccoons
Metals in waterand sediment
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Summary and Conclusions
- Food chain studies provide a weight-of-evidence approach for evaluating possible causal relationships between exposure to fly ash metals and effects on ecological resources
- For all fish species studied, there is spatial gradient in bioaccumulation of selenium and arsenic with highest levels downstream of the ash spill
- In most cases, levels of selenium in fish collected below the ash spill are not high enough to trigger the EPA tiered monitoring scheme for assessing toxicity of selenium in fish
- Spatial and temporal patterns in bioaccumulation suggest there are causal relationships between exposure to fly ash-associated metals and levels of metals in fish