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The Posidonia oceanica marine sedimentary record: A Holocene archive of heavy metal pollution

AuthorsSerrano, Oscar ; Mateo, Miguel Ángel ; Dueñas Bohórquez, A.; Renom, O.; López Sáez, José Antonio ; Martínez Cortizas, A.
KeywordsHuman impact
NW Mediterranean Sea
Posidoniaoceanica mat
Peat-like marine deposits;
Coastal ecosystem
Issue Date2011
CitationScience of the Total Environment 409: 1-10 (2011)
AbstractThe study of aPosidoniaoceanica mat (a peat-like marine sediment) core has provided a record of changes in heavymetal abundances (Fe, Mn, Ni, Cr, Cu, Pb, Cd, Zn, As and Al) since the Mid-Holocene (last 4470 yr) in Portlligat Bay (NW Mediterranean). Metal contents were determined in P. oceanica. Both, the concentration records and the results of principal components analysis showed that metalpollution in the studied bay started ca. 2800 yr BP and steadily increased until present. The increase in Fe, Cu, Pb, Cd, Zn and As concentrations since ca. 2800 yr BP and in particular during Greek (ca. 2680–2465 cal BP) and Roman (ca. 2150–1740 cal BP) times shows an early anthropogenic pollution rise in the bay, which might be associated with large- and short-scale cultural and technological development. In the last ca. 1000 yr the concentrations of heavymetals, mainly derived from anthropogenic activities, have significantly increased (e.g. from ~ 15 to 47 μg g− 1 for Pb, ~ 23 to 95 μg g− 1 for Zn and ~ 8 to 228 μg g− 1 for As). Our study demonstrates for the first time the uniqueness of P. oceanica meadows as long-term archives of abundances, patterns, and trends of heavymetals during the Late Holocene in Mediterranean coastal ecosystems.
Description10 páginas, 6 figuras, 5 tablas.
Publisher version (URL)http://dx.doi.org/10.1016/j.scitotenv.2011.08.001
Appears in Collections:(CEAB) Artículos
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