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| Titel |
The role of the seagrass Posidonia oceanica in the cycling of trace elements |
| VerfasserIn |
C. Sanz-Lázaro, P. Malea, E. T. Apostolaki, I. Kalantzi, A. Marín, I. Karakassis |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 9, no. 7 ; Nr. 9, no. 7 (2012-07-10), S.2497-2507 |
| Datensatznummer |
250007182
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| Publikation (Nr.) |
 copernicus.org/bg-9-2497-2012.pdf |
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| Zusammenfassung |
| The aim of this study was to investigate the role of the seagrass Posidonia oceanica on the
cycling of a wide set of trace elements (Ag, As, Ba, Bi, Cd, Co, Cr, Cs, Cu,
Fe, Ga, Li, Mn, Ni, Pb, Rb, Sr, Tl, V and Zn). We measured the concentration
of these trace elements in different compartments of P. oceanica (leaves, rhizomes,
roots and epiphytes) in a non-polluted seagrass meadow representative of the
Mediterranean and calculated the annual budget from a mass balance. We
provide novel data on accumulation dynamics of many trace elements in P. oceanica
compartments and demonstrate that trace element accumulation patterns are
mainly determined by plant compartment rather than by temporal variability.
Epiphytes were the compartment, which showed the greatest concentrations for
most trace elements. Thus, they constitute a key compartment when estimating
trace element transfer to higher trophic levels by P. oceanica. Trace element
translocation in P. oceanica seemed to be low and acropetal in most cases. Zn, Cd, Sr
and Rb were the trace elements that showed the highest release rate through
decomposition of plant detritus, while Cs, Tl and Bi showed the lowest. P. oceanica acts
as a sink of potentially toxic trace elements (Ni, Cr, As and Ag), which can
be sequestered, decreasing their bioavailability. P. oceanica may have a relevant role
in the cycling of trace elements in the Mediterranean. |
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