Department of Environmental Science, Graduate School of the Environment and Energy, Science and Research Campus, Islamic Azad University, Tehran, Iran.
Biol Trace Elem Res. 2011 Sep;142(3):500-16. doi: 10.1007/s12011-010-8795-x. Epub 2010 Aug 7.
Present study investigates relationships between total and bioaccessibility of trace elements (Cd, Co, Cr, Cu, Mn, NI, Pb, V, and Zn) concentrations in sediment and their bioaccumulation in species in Shadegan wetland in southwest of Iran. Bioavailability factor (BAF) and translocation factor (TF) were calculated in plants and trophic transfer factor (TTF) was determined in bird species. For this purpose, sampling of sediments, aquatic plants including Phragmites australis, Typha australis, Scripus maritimus and two bird species encircling Porphyrio porphyrio and globally threatened Marmaronetta angustirostris were carried out during winter 2009. Result of chemical analysis show that bioaccessibility concentrations of Mn (8.31 mg/kg), V (1.33 mg/kg), and Pb (1.03 mg/kg) are higher than other metals. The uptake trend of trace elements in plant decreases as root > stem > leaf. Accumulation levels of trace elements in different tissues of P. porphyrio and M. angustirostris are almost identical and considerable. Accumulation and toxicity of Cd in birds is more than plants. In addition, BAF of V, Pb, and Cr indicates high accumulation by plants and great pollution rate in the area of study. In S. maritimus TF for Mn, Cu, Pb, and V are high whereas in T. australis, Cu and Pb posses the highest TF. Also Cr, Co, Mn, Ni, and Zn have higher TF from stem to leaf than root to stem in P. australis. Finally, TTFs were compared in various bird species.
本研究调查了伊朗西南部沙德甘湿地沉积物中微量元素（Cd、Co、Cr、Cu、Mn、Ni、Pb、V 和 Zn）总量和生物可利用性与它们在物种中的生物累积之间的关系。在植物中计算了生物可利用性因子（BAF）和迁移因子（TF），在鸟类中确定了营养转移因子（TTF）。为此，在 2009 年冬季，对沉积物、水生植物（包括芦苇、菖蒲、海蓬子和两种鸟类，即环绕火烈鸟和全球受威胁的朱鹮的鹳）进行了采样。化学分析结果表明，Mn（8.31mg/kg）、V（1.33mg/kg）和 Pb（1.03mg/kg）的生物可利用性浓度高于其他金属。微量元素在植物中的吸收趋势为根>茎>叶。不同组织中痕量元素在火烈鸟和朱鹮中的积累水平几乎相同，且相当高。鸟类体内 Cd 的积累和毒性高于植物。此外，V、Pb 和 Cr 的 BAF 表明植物的积累量较高，研究区域的污染程度较大。在海蓬子中，Mn、Cu、Pb 和 V 的 TF 较高，而在菖蒲中，Cu 和 Pb 的 TF 最高。此外，在芦苇中，Cr、Co、Mn、Ni 和 Zn 从根到茎的 TF 高于从茎到叶的 TF。最后，比较了各种鸟类中的 TTF。
