On November 2015, Samarco tailings dam in Mariana, Minas Gerais, Brazil, collapsed, releasing 62 million tons of tailings that advanced through 668 km of the Doce River and adjacent floodplain. Although the collapse was the worst environmental disaster in Brazil, little is known about its consequences to aquatic biota. Here we evaluate the effects of the tailings mudflow on metal and As concentration in fish and how concentration correlates with water and fish characteristics. We quantified semitotal amounts of Ag, Al, As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, and Zn in fish muscle tissue using inductively coupled plasma mass spectrometry (ICP‐MS) in 255 individuals (34 species) sampled in unaffected and affected areas along the Doce River basin. Arsenic and Hg were higher in fish from affected sites, likely due to turbulent mixing of previously sedimented material by the giant tailings wave. Silver and Zn concentrations were higher in unaffected sites. Arsenic concentration in Geophagus brasiliensis decreased with increasing fish weight. Copper and Zn decreased with increasing fish weight considering the whole assembly of fish. The tailings mudflow increased water conductivity, and conductivity increased Al concentration in fish, so we expected a larger Al concentration in fishes from affected sites. However, the observed Al concentration in fishes from affected sites was lower than expected by water conductivity. Thus, the tailings mudflow reduced Al uptake or accumulation in fishes. Mercury decreased with increasing water conductivity in both unaffected and affected sites considering all species and in G. brasiliensis alone. Despite the relatively low concentration range of metals and As found in fish, fishes from sites affected by the Fe ore tailings mudflow showed higher As and Hg concentration, compared to fishes from unaffected sites. The higher As and Hg in affected sites require further detailed monitoring to ensure safeguards of human health by fishing activity along the Doce River. Integr Environ Assess Manag 2020;16:622–630. © 2020 SETAC

中文翻译：

---

Samarco尾矿坝坍塌对巴西东南部Doce河淡水鱼肌肉中金属和砷浓度的影响。

2015年11月，巴西米纳斯吉拉斯州马里亚纳的Samarco尾矿坝坍塌，释放了6,200万吨的尾矿，这些尾矿穿过668公里的Doce河和附近的洪泛区。尽管这次倒塌是巴西最严重的环境灾难，但对其破坏对水生生物的影响知之甚少。在这里，我们评估了尾矿泥流对鱼类中金属和砷浓度的影响，以及浓度与水和鱼类特征之间的关系。我们使用电感耦合等离子体质谱法（ICP-MS）对255个个体（34种）中的鱼肌肉组织中的银，铝，砷，镉，铬，铬，铬，铜，铁，汞，锰，镍，铅和锌的半定量进行了定量）在Doce河流域未受影响的地区进行采样。受影响地区鱼类的砷和汞含量较高，可能是由于巨大的尾矿波将先前沉积的物料进行了湍流混合。在未受影响的地点，银和锌的浓度较高。砷浓度巴西fish随着鱼的体重增加而减少。考虑到鱼的整体组装，铜和锌随着鱼重的增加而减少。尾矿泥流增加了水的电导率，并且电导率增加了鱼类中的铝浓度，因此我们预计受影响地区鱼类的铝浓度会更高。但是，在受影响地区的鱼类中观察到的铝浓度低于水电导率所预期的浓度。因此，尾矿泥流减少了鱼类对铝的吸收或积累。考虑到所有物种和巴西甘草，在未受影响和受影响的地区，汞均随着水电导率的增加而降低。单独。尽管在鱼类中发现的金属和砷的浓度范围相对较低，但是与未受影响的地点的鱼类相比，受铁矿石尾矿泥流影响的地点的鱼类显示出更高的砷和汞浓度。受影响地点较高的砷和汞需要进一步详细监测，以确保通过沿多西河捕鱼活动来保障人类健康。Integr环境评估管理2020； 16：622-630。©2020 SETAC