Department of Biological, Geological and Environmental Sciences, University of Catania, Via Antonino Longo 19, 95125, Catania, Italy.
Marine Biology Station, National Institute of Biology, Fornace 41, 6330 Piran, Slovenia.
Mar Pollut Bull. 2017 Dec 15;125(1-2):8-18. doi: 10.1016/j.marpolbul.2017.10.078. Epub 2017 Oct 31.
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.
本研究调查了地中海海草及其近环境（海水和沉积物）中微量元素的最新研究进展。分析的物种有：海洋雀稗、地中海真海枣、宽叶海索麻、马尾藻和诺特马尾藻。所有这些物种对污染都具有很高的耐受性和积累微量元素的高能力。海草也表现出相似的积累模式：砷、汞和铅的最高浓度在根部，而镉、铬、铜、锰、镍和锌的浓度在叶子中最高。大多数微量元素在海草中的毒性水平尚不清楚。微量元素在海草中的积累被广泛认为是整个食物网的风险，但这种风险的真正程度仍然不确定。海草被认为是微量元素的生物指标，但在建立生物监测网络方面，这种潜力仍未得到充分重视。
