Tissue‐based risk assessment of great blue heron (<i>Ardea herodias</i>) exposed to PCDD/DF in the Tittabawassee River floodplain, Michigan, USA

Seston, Rita M.; Fredricks, Timothy B.; Tazelaar, Dustin L.; Coefield, Sarah J.; Bradley, Patrick W.; Newsted, John L.; Kay, Denise P.; Fitzgerald, Scott D.; Giesy, John P.; Zwiernik, Matthew J.

doi:10.1002/etc.319

Cited by 5 publications

(1 citation statement)

References 63 publications

(69 reference statements)

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“…This could be the result of TCDF being metabolised and PeCDF being retained by American robins . This difference was also observed for other receptor species in parallel studies .…”

Section: Discussionmentioning

confidence: 99%

Multiple lines of evidence risk assessment of american robins exposed to polychlorinated dibenzofurans (PCDFS) and polychlorinated dibenzo‐P‐dioxins (PCDDS) in the tittabawassee river floodplain, Midland, Michigan, Usa

Tazelaar

Fredricks

Seston

et al. 2013

Enviro Toxic and Chemistry

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Concentrations of polychlorinated dibenzofurans (PCDFs) and polychlorinated dibenzo-p-dioxins (PCDDs) in Tittabawassee River floodplain soils and biota downstream of Midland, Michigan, USA, are greater than regional background concentrations. From 2005 to 2008, a multiple lines of evidence approach was utilized to evaluate the potential for effects of PCDD/DFs on American robins (Turdus migratorius) breeding in the floodplains. A dietary-based assessment indicated there was potential for adverse effects for American robins predicted to have the greatest exposures. Conversely, a tissue-based risk assessment based on site-specific PCDD/DF concentrations in American robin eggs indicated minimal potential for adverse effects. An assessment based on reproductive endpoints indicated that measures of hatch success in study areas were significantly less than those of reference areas. However, there was no dose-response relationship between that endpoint and concentrations of PCDD/DF. Although dietary-based exposure and reproductive endpoint assessments predicted potential for adverse effects to resident American robins, the tissue-based assessment indicates minimal to no potential for adverse effects, which is reinforced by the fact the response was not dose related. It is likely that the dietary assessment is overly conservative given the inherent uncertainties of estimating dietary exposure relative to direct tissue-based assessment measures. Based on the available data, it can be concluded that exposure to PCDD/DFs in the Tittabawassee River floodplain would not likely result in adverse population-level effects to American robins. Environ Toxicol Chem 2013;32:1304-1316. # 2013 SETAC

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“…This could be the result of TCDF being metabolised and PeCDF being retained by American robins . This difference was also observed for other receptor species in parallel studies .…”

Section: Discussionmentioning

confidence: 99%

Multiple lines of evidence risk assessment of american robins exposed to polychlorinated dibenzofurans (PCDFS) and polychlorinated dibenzo‐P‐dioxins (PCDDS) in the tittabawassee river floodplain, Midland, Michigan, Usa

Tazelaar

Fredricks

Seston

et al. 2013

Enviro Toxic and Chemistry

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Assessing Risks to Wildlife from Exposures to Chemicals

Sample,

Johnson,

Moore

2024

Human and Ecological Risk Assessment

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Dietary‐ and tissue‐based exposure of belted kingfisher to PCDFs and PCDDs in the Tittabawassee River floodplain, Midland, MI, USA

Seston

Giesy

Fredricks

et al. 2012

Enviro Toxic and Chemistry

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Concentrations of polychlorinated dibenzofurans (PCDFs) and other dioxin-like compounds in soils and sediments of the Tittabawassee River and associated floodplains downstream of Midland, Michigan, USA, are greater than upstream sites. As a result of these concentrations, which are some of the greatest ever reported, a site-specific exposure assessment of belted kingfisher breeding in the assessment area was conducted. To reduce the uncertainty associated with predicting exposure from abiotic matrices, concentrations of residues were quantified in site-specific prey items and in eggs and nestlings of belted kingfisher. Dietary exposure, expressed as the potential average daily dose, based on site-specific concentrations of PCDFs, polychlorinated dibenzo-p-dioxins (PCDDs), and 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents (TEQ(WHO-Avian)) in prey items was consistently greater along the Tittabawassee River than in associated reference areas and further downstream sites in the Saginaw River. Concentrations of PCDD/DFs in eggs and nestlings of belted kingfisher varied among sampling areas, being greater in both eggs and nestlings nesting along the Tittabawassee River compared to those of belted kingfisher from upstream reference areas. Geometric mean concentrations of PCDD/DFs were 130 and 200 ng/kg wet weight in eggs and nestlings of belted kingfisher, respectively. These concentrations are the equivalent of 84 and 95 ng TEQ(WHO-Avian)/kg. Site-specific biomagnification factors for select PCDD/DF congeners ranged from <1.0 to 1.8 in belted kingfisher.

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Tissue‐based risk assessment of great blue heron (Ardea herodias) exposed to PCDD/DF in the Tittabawassee River floodplain, Michigan, USA

Cited by 5 publications

References 63 publications

Multiple lines of evidence risk assessment of american robins exposed to polychlorinated dibenzofurans (PCDFS) and polychlorinated dibenzo‐P‐dioxins (PCDDS) in the tittabawassee river floodplain, Midland, Michigan, Usa

Multiple lines of evidence risk assessment of american robins exposed to polychlorinated dibenzofurans (PCDFS) and polychlorinated dibenzo‐P‐dioxins (PCDDS) in the tittabawassee river floodplain, Midland, Michigan, Usa

Assessing Risks to Wildlife from Exposures to Chemicals

Dietary‐ and tissue‐based exposure of belted kingfisher to PCDFs and PCDDs in the Tittabawassee River floodplain, Midland, MI, USA

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