Biological archives reveal contrasting patterns in trace element concentrations in pelagic seabird feathers over more than a century
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Issue date
2020-08-01Submitted date
2020-09-02Subject Terms
Ardenna carneipesFlesh-footed Shearwater
Mercury
Lead
Cadmium
Western Australia
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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, 114631Publisher
ElsevierJournal
Environmental PollutionType
Journal ArticleItem 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
0269-7491ae974a485f413a2113503eed53cd6c53
10.1016/j.envpol.2020.114631
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