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    Integrating monitoring and genetic methods to infer historical risks of PCBs and DDE to common and roseate terns nesting near the New Bedford Harbor Superfund site (Massachusetts, USA)

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    Author's manuscript (409.7Kb)
    Supplemental information (668.0Kb)
    Date
    2016-09
    Author
    Nacci, Diane E.  Concept link
    Hahn, Mark E.  Concept link
    Karchner, Sibel I.  Concept link
    Jayaraman, Saro  Concept link
    Mostello, Carolyn  Concept link
    Miller, Kenneth M.  Concept link
    Blackwell, Carma Gilchrist  Concept link
    Nisbet, Ian C. T.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/8497
    As published
    https://doi.org/10.1021/acs.est.6b02108
    Keyword
     Terns; Species sensitivity; New Bedford; PCBs; Ecological risk assessment 
    Abstract
    Common and roseate terns are migratory piscivorous seabirds with major breeding colonies within feeding range of the PCB-contaminated New Bedford Harbor (NBH, MA, USA) Superfund site. Our longitudinal study shows that before PCB discharges into NBH ceased (late 1970s), tern eggs had very high but variable PCB concentrations. But egg concentrations of PCBs as well as DDE, the degradation product of the ubiquitous global contaminant DDT, have since declined. Rate constants for temporal decline of PCB congeners in tern eggs varied inversely with log10KOW (n-octanol-water partition coefficient), shifting egg congener patterns away from those characterizing NBH sediment. To estimate the toxic effects on tern eggs of PCB dioxin-like congener (DLC) exposures, we extrapolated published laboratory data on common terns to roseate terns by characterizing genetic and functional similarities in species aryl-hydrocarbon receptors (AHRs), which mediate DLC sensitivity. Our assessment of contaminant risks suggests that terns breeding near NBH were exposed historically to toxic levels of PCBs and DDE; however, acute effects on tern egg development have become less likely since the 1970s. Our approach demonstrates how comparative genetics at target loci can effectively increase the range of inference for chemical risk assessments from tested to untested and untestable species.
    Description
    Author Posting. © The Author(s), 2016. This is the author's version of the work. It is posted here by permission of American Chemical Society for personal use, not for redistribution. The definitive version was published in Environmental Science & Technology 50 (2016): 10226–10235, doi:10.1021/acs.est.6b02108.
    Collections
    • Biology
    Suggested Citation
    Preprint: Nacci, Diane E., Hahn, Mark E., Karchner, Sibel I., Jayaraman, Saro, Mostello, Carolyn, Miller, Kenneth M., Blackwell, Carma Gilchrist, Nisbet, Ian C. T., "Integrating monitoring and genetic methods to infer historical risks of PCBs and DDE to common and roseate terns nesting near the New Bedford Harbor Superfund site (Massachusetts, USA)", 2016-09, https://doi.org/10.1021/acs.est.6b02108, https://hdl.handle.net/1912/8497
     

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