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Geochemistry of large benthic foraminifera Amphisorus hemprichii as a high-resolution proxy for lead pollution in coastal environments

Sagar, N., Sadekov, A., Scott, P., Jenner, T., Vadiveloo, A.ORCID: 0000-0001-8886-5540, Moheimani, N.R.ORCID: 0000-0003-2310-4147 and McCulloch, M. (2021) Geochemistry of large benthic foraminifera Amphisorus hemprichii as a high-resolution proxy for lead pollution in coastal environments. Marine Pollution Bulletin, 162 . Art. 111918.

Link to Published Version: https://doi.org/10.1016/j.marpolbul.2020.111918
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Abstract

Anthropogenic lead (Pb) contamination resulting from the rapid growth of industrialization in coastal environments poses significant challenges. In this study, we report a novel approach utilising the large benthic foraminifera Amphisorus hemprichii as a biogeochemical archive for monitoring Pb pollution in tropical to warm-temperate coastal waters. Live juvenile specimens of A. hemprichii were cultured in the laboratory for 16 weeks with a range of seawater Pb concentrations. Lead uptake in both newly grown and pre-existing chambers of individual specimens was characterised using the microanalytical technique, Laser ablation-ICP mass spectrometry. We found that Pb concentration in the tests of cultured foraminifera in the laboratory is proportional to seawater [Pb] with the lead partition coefficient (KDPb) of 8.37 ± 0.3. This calibration together with a new biomineralisation model now enables A. hemprichii to be utilised as a naturally occurring bio-archive to quantitatively monitor anthropogenic Pb pollution in coastal waters.

Item Type: Journal Article
Murdoch Affiliation(s): Environmental and Conservation Sciences
Algae R&D Centre
Publisher: Elsevier BV
Copyright: © 2020 Elsevier Ltd.
URI: http://researchrepository.murdoch.edu.au/id/eprint/59189
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