Zhuang Ping, Zou Huiling, Shu Wensheng
School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China.
J Environ Sci (China). 2009;21(6):849-53. doi: 10.1016/s1001-0742(08)62351-7.
The accumulation and transfer of Pb, Zn, Cu, and Cd along a soil-plant-insect-chicken food chain at contaminated sites were investigated. The study site nearing the Pb/Zn mine had been contaminated by heavy metals severely. Cadmium and Pb concentrations steadily declined with increasing trophic level (p < 0.01), but concentrations of Zn and Cu slightly increased from plant to insect larva (p > 0.05). The concentrations of heavy metals were the highest in chicken muscle, with lower values in liver and blood. The bioaccumulation of Pb was observed in chicken livers. The eliminations of Pb, Zn, Cu, and Cd via insect and chicken feces avoid metal bioaccumulation in insect and chicken body. These results suggest that the accumulation of heavy metals in specific animal organ of tissues could not be neglected, although transfer of metals to chicken from plant and insect was limited.
研究了污染场地中铅、锌、铜和镉沿土壤-植物-昆虫-鸡食物链的积累和转移情况。靠近铅锌矿的研究场地已受到重金属的严重污染。镉和铅的浓度随着营养级的升高而稳步下降（p < 0.01），但锌和铜的浓度从植物到昆虫幼虫略有增加（p > 0.05）。重金属浓度在鸡胸肉中最高，在肝脏和血液中的浓度较低。在鸡肝脏中观察到铅的生物积累。通过昆虫和鸡粪便对铅、锌、铜和镉的排泄避免了金属在昆虫和鸡体内的生物积累。这些结果表明，尽管从植物和昆虫向鸡的金属转移有限，但重金属在特定动物组织器官中的积累不容忽视。
