Exposure and effects of 2,3,7,8‐tetrachlorodibenzo‐<i>p</i>‐dioxin in tree swallows (<i>Tachycineta bicolor</i>) nesting along the Woonasquatucket River, Rhode Island, USA

Custer, Christine M.; Custer, Thomas W.; Rosiu, Cornell J.; Melancon, Mark J.; Bickham, John W.; Matson, Cole W.

doi:10.1897/03-682.1

Cited by 61 publications

(115 citation statements)

References 63 publications

(118 reference statements)

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“…Stomach contents from tree swallow nestlings and pipers from the Woonasquatucket River floodplain contained 71 to 219 ng/kg ww 2,3,7,8-TCDD (Custer et al 2005), while samples from the primarily PCBcontaminated Housatonic River area (Custer et al 2003) had only a few PCDD/DF congeners with detectable concentrations (2,3,7,1,2,3,7,1,2,3,4,6,7,(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30) ng/kg ww). Tree swallows primarily exposed to PCBs in southern Illinois had dietary TEQ WHO−Avian concentrations that ranged from 0.52 to 35 ng/kg ww for food web samples and averaged 4.4 ng/kg ww in stomach contents (Maul et al 2006).…”

Section: Pcdd/dfs and Teqs Who−avianmentioning

confidence: 99%

“…The mixture of chlorinated hydrocarbons in the SA is dominated by a few PCDF congeners, which makes it distinctive compared to other locations contaminated with PCB mixtures or PCDDs (Custer et al 2002(Custer et al , 2005Froese et al 1998;Harris and Elliott 2000;Neigh et al 2006b, c;Secord et al 1999;Shaw 1983;Smits et al 2005;Spears et al 2008). Furthermore, based on chemical characteristics and best estimates of historical production data, it is likely that this unique mixture has been in place for almost a century, with most of the materials being released prior to the 1950s (ATS 2007(ATS , 2009.…”

mentioning

confidence: 99%

“…Because of the elevated soil and sediment concentrations in the SA (Hilscherova et al 2003) and low avian dietary exposure thresholds (Custer et al 2005;Eisler 2000;Nosek et al 1992), the authors investigated the potential for the accumulation of PCDFs and PCDDs from invertebrates to resident insectivorous birds.…”

mentioning

confidence: 99%

“…Site-specific dietary composition is related to the prevailing invertebrate abundance (Custer et al 2005;Echols et al 2004;Neigh et al 2006a;Nichols et al 1995;Quinney and Ankney 1985;Smits et al 2005;Wayland et al 1998) and the timing of nest initiation (Custer et al 1998;Maul et al 2006;Papp et al 2007), especially for tree swallows that prey primarily on emergent aquatic invertebrates to feed nestlings (Blancher and McNicol 1991;Johnson and Lombardo 2000;McCarty and Winkler 1999). Site-specific residue concentrations in egg and nestling tissues have been studied for a variety of chlorinated hydrocarbons and species (Ankley et al 1993;Bishop et al 1995;Custer et al 1998Custer et al , 2003Custer et al , 2005Froese et al 1998;Henning et al 2003;Neigh et al 2006a, b, c;Spears et al 2008). Fewer studies have investigated accumulation via the diet or determined uptake rates Nichols et al 1995Nichols et al , 2004.…”

mentioning

confidence: 99%

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Dietary exposure of three passerine species to PCDD/DFs from the Chippewa, Tittabawassee, and Saginaw River floodplains, Midland, Michigan, USA

Fredricks

Giesy

Coefield

et al. 2010

Environ Monit Assess

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Dietary exposure of house wrens (Troglodytes aedon), tree swallows (Tachycineta bicolor), and eastern bluebirds (Sialia sialis) to polychlorinated dibenzofurans (PCDFs) and polychlorinated dibenzo-p-dioxins (PCDDs) near Midland, Michigan (USA) was evaluated based on site-specific data, including concentrations of Assess (2011) 172:91-112 dietary concentrations for nestlings at study areas (SAs) were 6-to 20-fold and 2-to 9-fold greater than at proximally located reference areas (RAs), respectively. Average ingestion values of total 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents (TEQ WHO−Avian ) from site-specific bolus-based and food web-based dietary concentrations for nestlings at SAs were 31-to 121-fold and 9-to 64-fold greater than at proximally located RAs, respectively. Estimates of PCDD/DFs and TEQ WHO−Avian tissue concentrations based on nestling dietary exposures were greater than those measured. Plausible explanations include nestling metabolism of 2,3,7,8-tetrachlorodibenzofuran and assimilation rates of less than the 70% assumed to occur over the nestling growth period. Profiles of the relative concentrations of individual PCDD/DF congeners in samples of invertebrates and bolus at SAs on the Tittabawassee River downstream of the source of contamination were dominated by 1,2,3,4,6,7,8,9-octachlorodibenzo-p-dioxin (22% to 44%) and 2,3,7,8-tetrachlorodibenzofuran (18% to 50%).

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Section: Pcdd/dfs and Teqs Who−avianmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Dietary exposure of three passerine species to PCDD/DFs from the Chippewa, Tittabawassee, and Saginaw River floodplains, Midland, Michigan, USA

Fredricks

Giesy

Coefield

et al. 2010

Environ Monit Assess

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“…Limitations of the study include the use of injections of TCDD instead of feeding TCDD contaminated prey to the test species and the evaluation of TCDD exposure and not PCB exposure. TEQs based on PCBs may overestimate exposure relative to TCDD (Custer et al 2005), so TRVs based on TCDD exposure are likely to be conservatively estimate risk when applied to PCB exposure. TRVs derived from Nosek et al (1992) are likely conservative because the galliformes used in the study are among the more sensitive species to the effects of TCDD (Hoffman et al 1996).…”

Section: Dietary Exposure To Pcbs and Subsequent Risk For Songbirdsmentioning

confidence: 99%

Exposure and Multiple Lines of Evidence Assessment of Risk for PCBs Found in the Diets of Passerine Birds at the Kalamazoo River Superfund Site, Michigan

Neigh

Zwiernik

Blankenship

et al. 2006

Human and Ecological Risk Assessment: An International Journal

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Dietary exposures of passerine birds at the Kalamazoo River, Michigan, were examined due to the presence of polychlorinated biphenyls (PCBs) in the terrestrial and aquatic food webs. Average potential daily doses in diets were 6-to 29-fold and 16-to 35-fold greater at a contaminated location than at a reference location for PCB exposures quantified as total PCBs and 2,3,7,8-tetrachlorodibenzo-p -dioxin equivalents (TEQs), respectively. Birds with diets comprised of primarily aquatic insects had greater dietary exposure than birds with diets of primarily terrestrial insects. Risk associated with dietary exposure varied with the selection of the threshold for effects including hazard quotients, which exceeded 1 in instances where the most conservative toxicity reference values were utilized. Risk based on concentrations of PCBs in the tissues indicated little risk to avian species, and co-located studies evaluating reproductive health did not suggest that observed incidences of diminished reproductive success were related to PCB exposure. Measures of risk based on comparison to toxicity reference values (TRVs) were consistent with direct measures of ecologically relevant endpoints of reproductive fitness, but uncertainty exists in the selection of threshold values for effects in these species especially based on TEQs. This is largely due to the absence of species-specific, dose-response relationships. Therefore, the best estimate of risk is through the application of multiple lines of evidence. INTRODUCTIONThe purpose of this study was to describe the exposure pathways for passerine birds exposed to polychlorinated biphenyls (PCBs) at the Kalamazoo River and to estimate risk associated with PCBs through those pathways. A secondary goal was to compare the two established methodologies for estimating exposure and subsequent risk. Finally, the results of the risk assessments based on the two methods of estimating exposure were compared to measures of reproductive fitness at the more PCB-contaminated site and the less contaminated, upstream reference location. The first method for estimating exposure, the "top-down" approach, measured concentrations of PCBs in the eggs, nestlings, and adults of each species. The other approach, which predicts exposure based on concentrations of PCBs in dietary items, is referred to as "bottom-up" (Fairbrother 2003). The two approaches, although inherently linked, have become disjointed in the risk evaluation process. The reason for this separation is often related to constraints on funding and time, but the assessor cannot be unequivocally assured that their selection of methodology does not overlook some important interaction in determining risk, or for that matter, does not over or underestimate risk based on uncertainties due to the adjustment of models from the given data.It has been suggested that several lines of evidence be used to evaluate risk instead of implementing only one type of methodology (Fairbrother 2003). However, it may not always be possible to apply mult...

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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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Exposure and effects of 2,3,7,8‐tetrachlorodibenzo‐p‐dioxin in tree swallows (Tachycineta bicolor) nesting along the Woonasquatucket River, Rhode Island, USA

Cited by 61 publications

References 63 publications

Dietary exposure of three passerine species to PCDD/DFs from the Chippewa, Tittabawassee, and Saginaw River floodplains, Midland, Michigan, USA

Dietary exposure of three passerine species to PCDD/DFs from the Chippewa, Tittabawassee, and Saginaw River floodplains, Midland, Michigan, USA

Exposure and Multiple Lines of Evidence Assessment of Risk for PCBs Found in the Diets of Passerine Birds at the Kalamazoo River Superfund Site, Michigan

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

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