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    Biological archives reveal contrasting patterns in trace element concentrations in pelagic seabird feathers over more than a century

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    Authors
    Bond, AL cc
    Lavers, JL
    Issue date
    2020-08-01
    Submitted date
    2020-09-02
    Subject Terms
    Ardenna carneipes
    Flesh-footed Shearwater
    Mercury
    Lead
    Cadmium
    Western Australia
    
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    Abstract
    Contamination of diverse environments and wild species by some contaminants is projected to continue and increase in coming decades. In the marine environment, large volumes of data to assess how concentrations have changed over time can be gathered from indicator species such as seabirds, including through sampling feathers from archival collections and museums. As apex predators, Flesh-footed Shearwaters (Ardenna carneipes) are subject to high concentrations of bioaccumulative and biomagnifying contaminants, and reflect the health of their local marine environment. We analysed Flesh-footed Shearwater feathers from Australia from museum specimens and live birds collected between 1900 and 2011 and assessed temporal trends in three trace elements of toxicological concern: cadmium, mercury, and lead. Concentrations of cadmium increased by 1.5% per year (95% CI: +0.6, +3.0), while mercury was unchanged through the time series (−0.3% per year; 05% CI: -2.1, +1.5), and lead decreased markedly (−2.1% per year, 95% CI: -3.2, −1.0). A reduction in birds’ trophic position through the 20th century, and decreased atmospheric emissions were the likely driving factors for mercury and lead, respectively. By combining archival material from museum specimens with contemporary samples, we have been able to further elucidate the potential threats posed to these apex predators by metal contamination.
    Citation
    Alexander L. Bond, Jennifer L. Lavers, Biological archives reveal contrasting patterns in trace element concentrations in pelagic seabird feathers over more than a century, Environmental Pollution, Volume 263, Part B, 2020, 114631
    Publisher
    Elsevier
    Journal
    Environmental Pollution
    URI
    http://hdl.handle.net/10141/622825
    DOI
    10.1016/j.envpol.2020.114631
    Type
    Journal Article
    Item Description
    This document is the author’s final accepted version of the journal article. You are advised to consult the published version if you wish to cite from it.
    NHM Repository
    ISSN
    0269-7491
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.envpol.2020.114631
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