TY - JOUR
T1 - Geochemistry of large benthic foraminifera Amphisorus hemprichii as a high-resolution proxy for lead pollution in coastal environments
AU - Sagar, Netramani
AU - Sadekov, Aleksey
AU - Scott, Peter
AU - Jenner, Talia
AU - Vadiveloo, Ashiwin
AU - Moheimani, Navid R.
AU - McCulloch, Malcolm
PY - 2021/1
Y1 - 2021/1
N2 - 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.
AB - 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.
KW - Amphisorus hemprichii
KW - Biogeochemical-monitoring
KW - Coastal lead pollution
KW - LA-ICPMS
KW - Large benthic foraminifera
KW - Lead geochemistry
UR - http://www.scopus.com/inward/record.url?scp=85097782666&partnerID=8YFLogxK
U2 - 10.1016/j.marpolbul.2020.111918
DO - 10.1016/j.marpolbul.2020.111918
M3 - Article
C2 - 33341078
AN - SCOPUS:85097782666
VL - 162
JO - Marine Pollution Bulletin
JF - Marine Pollution Bulletin
SN - 0025-326X
M1 - 111918
ER -