Key Laboratory for Heavy Metal Pollution Control and Reutilization, School of Environment and Energy, Shenzhen Graduate School of Peking University, Shenzhen 518055, PR China; College of Life Sciences, Nankai University, Tianjin 300071, PR China.
College of Life Sciences, Nankai University, Tianjin 300071, PR China.
Mar Pollut Bull. 2014 Jul 15;84(1-2):115-24. doi: 10.1016/j.marpolbul.2014.05.028. Epub 2014 Jun 13.
To investigate the effects of Spartina alterniflora on heavy metals pollution of intertidal sediments, sediment cores of a S. alterniflora salt marsh and a mudflat in Bohai Bay, China were analyzed. The results showed that S. alterniflora caused higher total C and P, but lower bulk density and electrical conductivity. The levels of Cd, Cu and Pb were higher in S. alterniflora sediment. Both Cd and Zn were higher than the probable effect level at both sites, indicating their toxicological importance. The geo-accumulation and potential ecological risk indexes revealed higher metal contamination in S. alterniflora sediment. Multivariate analysis implied that anthropogenic activities altered mobility and bioavailability of heavy metals. The percentage of mobile heavy metals was higher in S. alterniflora sediment, indicating improvement of conversion from the immobilized fraction to the mobilized fraction. These findings indicate that S. alterniflora may facilitate accumulation of heavy metals and increase their bioavailability and mobility.
为了研究互花米草对潮间带沉积物重金属污染的影响，对中国渤海湾互花米草盐沼和泥滩的沉积物岩芯进行了分析。结果表明，互花米草导致总碳和总磷含量较高，但密度和电导率较低。互花米草沉积物中的 Cd、Cu 和 Pb 含量较高。两个地点的 Cd 和 Zn 均高于可能的效应水平，表明它们具有毒理学重要性。地积累和潜在生态风险指数表明，互花米草沉积物中的金属污染程度更高。多元分析表明，人为活动改变了重金属的迁移性和生物可利用性。互花米草沉积物中可移动重金属的比例较高，表明固定态向可移动态的转化有所改善。这些发现表明，互花米草可能促进重金属的积累，并增加其生物可利用性和迁移性。
