TY - JOUR
T1 - Stable isotopes and geochemical indicators in marine sediments as proxies for anthropogenic impact
T2 - A baseline for coastal environments of central Chile (33°S)
AU - Pastene, Marion
AU - Quiroga, Eduardo
AU - Hurtado, Carlos Felipe
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/5
Y1 - 2019/5
N2 - Stable isotopes and geochemical proxies (TOC/TN and Chla/TOC) in sediments can be used to distinguish organic matter sources (anthropogenic, terrestrial, or marine). This study aims to characterize organic matter (OM) in superficial sediments from three sectors of central Chile (33°S) that are highly influenced by urban and industrial development. Our results show that a substantial fraction of these OM in Quintero Bay is anthropogenic, from industrial and domestic wastewater sources. In contrast, a mixture of terrestrial and anthropogenic OM dominates the isotopic signal of surface sediments from Concón, derived from non-point industrial and agriculture sources associated with the Aconcagua River basin, while Ritoque exhibited a mixture of different OM sources. However, deposition of allochthonous OM in our study area depends on coastal topography, which influences the local currents and well-ventilated waters, promoting the dispersion and assimilation of OM and thus providing an environment with a high capacity for natural remediation.
AB - Stable isotopes and geochemical proxies (TOC/TN and Chla/TOC) in sediments can be used to distinguish organic matter sources (anthropogenic, terrestrial, or marine). This study aims to characterize organic matter (OM) in superficial sediments from three sectors of central Chile (33°S) that are highly influenced by urban and industrial development. Our results show that a substantial fraction of these OM in Quintero Bay is anthropogenic, from industrial and domestic wastewater sources. In contrast, a mixture of terrestrial and anthropogenic OM dominates the isotopic signal of surface sediments from Concón, derived from non-point industrial and agriculture sources associated with the Aconcagua River basin, while Ritoque exhibited a mixture of different OM sources. However, deposition of allochthonous OM in our study area depends on coastal topography, which influences the local currents and well-ventilated waters, promoting the dispersion and assimilation of OM and thus providing an environment with a high capacity for natural remediation.
KW - Coastal environments
KW - Organic matter pollution
KW - Quintero Bay
UR - http://www.scopus.com/inward/record.url?scp=85063036680&partnerID=8YFLogxK
U2 - 10.1016/j.marpolbul.2019.03.005
DO - 10.1016/j.marpolbul.2019.03.005
M3 - Article
C2 - 31232351
AN - SCOPUS:85063036680
SN - 0025-326X
VL - 142
SP - 76
EP - 84
JO - Marine Pollution Bulletin
JF - Marine Pollution Bulletin
ER -
