title: Trace element compartmentation in the seagrass Posidonia oceanica and biomonitoring applications.
abstract: This study investigated the trace element bioaccumulation capacity of the Mediterranean seagrass Posidonia oceanica, and its suitability as a bioindicator of contamination in water and sediments. Results showed that P. oceanica leaves accumulate higher concentrations of Ni and Zn. Since P. oceanica regenerates its leaves periodically, the higher concentrations in aerial organs may suggest a "removal" strategy according to which P. oceanica accumulates greater concentrations of trace elements in its temporary organs. In turn, P. oceanica seems to adopt an exclusion strategy for toxic non-essential elements (As, Cr, Pb). Results showed also that P. oceanica organs are correlated with As, Cd, Cu, Ni, and Zn concentrations in sediments. No significant relationship was found between P. oceanica and water. This study showed that P. oceanica may adopt different tolerance strategies compared to mainland-rooted macrophytes, and its possible use as a bioindicator of trace elements in sediments should be considered.
authors.affiliation: Department of Biological, Geological and Environmental Sciences, University of Catania, Via Antonino Longo 19, 95125 Catania, Italy. Electronic address: bonanno.giuseppe@unict.it.
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Bonanno
authors.affiliation: National Research Council (CNR), Institute of the Mediterranean Agricultural and Forest Systems, Via Empedocle 58, 95128 Catania, Italy.
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Di Martino
mesh_terms: D035961:Alismatales / Q000378:metabolism*; D004784:Environmental Monitoring; D019015:Geologic Sediments; D008522:Mediterranean Sea; D012623:Seawater; D014131:Trace Elements / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D014131:Trace Elements; D014874:Water Pollutants, Chemical
keywords: Marine pollution; Mediterranean Sea; Posidonia oceanica; Sediments; Sicily; Trace elements