Sobrino-Figueroa A S, Becerra-Rueda O F, Magallanes-Ordóñez V R, Sánchez-González A, Marmolejo-Rodríguez A J
Departamento de Hidrobiología, Universidad Autónoma Metropolitana-Iztapalapa (UAM-I), San Rafael Atlixco, Iztapalapa, 09340, Distrito Federal, Mexico.
Environ Monit Assess. 2015 Jan;187(1):4158. doi: 10.1007/s10661-014-4158-y. Epub 2014 Dec 19.
The mining district of El Triunfo (ET-MD) has an estimated 800,000 t of mine wastes scattered in the environment, contaminating the sediment with potentially toxic elements such as As, Cd, Pb, and Zn. In order to estimate the toxicity of the sediment to the adjacent biota, the aims of our study are to calculate the mortality and inhibition through bioassays, using sediment, and test organisms such as Daphnia magna and Selenastrum capricornutum (Pseudokirchneriella subcapitata), respectively. The D. magna mortality was 31 ± 12% and the S. capricornutum growth inhibition was 53 ± 24%. The contamination of the sediment determines the high mortality of D. magna and the high inhibition of S. capricornutum in the system, indicating risk for the biota in the contaminated system.
埃尔特里温福矿区（ET-MD）估计有80万吨矿山废弃物散布在环境中，用砷、镉、铅和锌等潜在有毒元素污染沉积物。为了评估沉积物对邻近生物群的毒性，我们研究的目的是分别使用沉积物以及大型溞和羊角月牙藻（假微型海链藻）等受试生物，通过生物测定法计算死亡率和抑制率。大型溞的死亡率为31±12%，羊角月牙藻的生长抑制率为53±24%。沉积物的污染决定了系统中大型溞的高死亡率和羊角月牙藻的高抑制率，表明受污染系统中的生物群面临风险。
