Bravo I, Focaracci F, Cerfolli F, Papetti P
Department of Business and Law, University of Cassino, Via S. Angelo-Campus, Folcara, 030343, Cassino, Italy.
Department of Ecological and Biological Sciences, Tuscia University, Viale dell'Università s/n, 01100, Viterbo, Italy.
Environ Monit Assess. 2016 Mar;188(3):157. doi: 10.1007/s10661-016-5122-9. Epub 2016 Feb 11.
The Mediterranean endemic seagrass Posidonia oceanica is widely used as a sensitive bioindicator of trace elements (TEs) in the coastal environment. Therefore, a bulk of data exist on TE levels from impacted versus unpolluted sites while only recent studies started comparing TE accumulation in plant compartments versus both water column and sediment characteristics. In this study, six TEs (As, Cd, Cr, Cu, Ni, Pb) were analyzed in P. oceanica shoots related to depth (-10 and -20 m) and to TE concentrations in the different grain size fractions of the sediment, from two Sites of Community interest (SIC) in the central Tyrrhenian Sea. TE concentrations in both shoots and sediment were generally low, except for Cr. Cu was the only element showing significantly different concentrations at the two sites while As differed significantly between samples taken at different depths. TE concentrations in the unsieved sediment were found uncorrelated to TEs in shoots except for the important nutrient Cu (positive correlation). The finest sediment fractions were enriched in TEs and significantly correlated to Cd, Cr, Cu, and Ni concentrations in the shoots.
地中海特有的海草波喜荡草被广泛用作沿海环境中微量元素（TEs）的敏感生物指标。因此，存在大量关于受影响地区与未受污染地区TEs水平的数据，而最近才有研究开始比较植物各部分中TEs的积累情况与水柱和沉积物特征。在本研究中，对来自第勒尼安海中部两个社区利益相关地点（SIC）的波喜荡草嫩枝中的六种TEs（砷、镉、铬、铜、镍、铅）进行了分析，这些嫩枝与深度（-10米和-20米）以及沉积物不同粒度级分中的TEs浓度相关。除铬外，嫩枝和沉积物中的TEs浓度总体较低。铜是唯一在两个地点显示出显著不同浓度的元素，而砷在不同深度采集的样本之间差异显著。发现未筛分沉积物中的TEs浓度与嫩枝中的TEs不相关，但重要的营养元素铜除外（呈正相关）。最细的沉积物级分富含TEs，并且与嫩枝中的镉、铬、铜和镍浓度显著相关。
