Trace elements in Mediterranean seagrasses: Accumulation, tolerance and biomonitoring. A review.

Giuseppe Bonanno, Martina Orlando-Bonaca

Journal: Marine pollution bulletin 2018;125(1-2):8-18

PMID: 29096977

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Abstract

This study investigated the state of the art on trace elements in Mediterranean seagrasses, and their close environment (seawater and sediment). The analyzed species were Posidonia oceanica, Cymodocea nodosa, Halophila stipulacea, Zostera marina and Zostera noltei. All these species showed high tolerance to pollution and high capacity of accumulation of trace elements. Seagrasses also showed similar patterns of accumulation: the highest concentrations of As, Hg and Pb were found in the roots, whereas those of Cd, Cr, Cu, Mn, Ni and Zn were found in the leaves. Phytotoxic levels in seagrasses are unknown for most trace elements. The accumulation of trace elements in seagrasses is widely recognized as a risk to the whole food web, but the real magnitude of this risk is still uncertain. Seagrasses are known to act as trace element bioindicators, but this potential is still poorly valued for the creation of biomonitoring networks.

Address: Department of Biological, Geological and Environmental Sciences, University of Catania, Via Antonino Longo 19, 95125, Catania, Italy. Electronic address: [email protected].; Marine Biology Station, National Institute of Biology, Fornace 41, 6330 Piran, Slovenia.

DOI: 10.1016/j.marpolbul.2017.10.078

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MeSH Terms: Alismatales, Environmental Monitoring, Environmental Pollution, Food Chain, Mediterranean Sea, Plant Leaves, Seawater, Trace Elements, Water Pollutants, Chemical, Zosteraceae