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  • Trophic magnification of organic chemicals: A global synthesis

    Author(s)
    Walters, DM
    Jardine, TD
    Cade, BS
    Kidd, KA
    Muir, DCG
    Leipzig-Scott, P
    Griffith University Author(s)
    Jardine, Timothy
    Year published
    2016
    Metadata
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    Abstract
    Production of organic chemicals (OCs) is increasing exponentially, and some OCs biomagnify through food webs to potentially toxic levels. Biomagnification under field conditions is best described by trophic magnification factors (TMFs; per trophic level change in log-concentration of a chemical) which have been measured for more than two decades. Syntheses of TMF behavior relative to chemical traits and ecosystem properties are lacking. We analyzed >1500 TMFs to identify OCs predisposed to biomagnify and to assess ecosystem vulnerability. The highest TMFs were for OCs that are slowly metabolized by animals (metabolic rate ...
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    Production of organic chemicals (OCs) is increasing exponentially, and some OCs biomagnify through food webs to potentially toxic levels. Biomagnification under field conditions is best described by trophic magnification factors (TMFs; per trophic level change in log-concentration of a chemical) which have been measured for more than two decades. Syntheses of TMF behavior relative to chemical traits and ecosystem properties are lacking. We analyzed >1500 TMFs to identify OCs predisposed to biomagnify and to assess ecosystem vulnerability. The highest TMFs were for OCs that are slowly metabolized by animals (metabolic rate kM < 0.01 day-1) and are moderately hydrophobic (log KOW 6-8). TMFs were more variable in marine than freshwaters, unrelated to latitude, and highest in food webs containing endotherms. We modeled the probability that any OC would biomagnify as a combined function of KOW and kM. Probability is greatest (∼100%) for slowly metabolized compounds, regardless of KOW, and lowest for chemicals with rapid transformation rates (kM > 0.2 day-1). This probabilistic model provides a new global tool for screening existing and new OCs for their biomagnification potential.
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    Journal Title
    Environmental Science & Technology
    Volume
    50
    Issue
    9
    DOI
    https://doi.org/10.1021/acs.est.6b00201
    Subject
    Organic chemistry
    Science & Technology
    Technology
    Life Sciences & Biomedicine
    Engineering, Environmental
    Environmental Sciences
    Publication URI
    http://hdl.handle.net/10072/408929
    Collection
    • Journal articles

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