LEAF, Linking Landscape, Environment, Agriculture and Food, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017, Lisbon, Portugal.
LEAF, Linking Landscape, Environment, Agriculture and Food, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017, Lisbon, Portugal.
Chemosphere. 2017 Sep;182:348-355. doi: 10.1016/j.chemosphere.2017.05.032. Epub 2017 May 6.
Few studies have been conducted into the evaluation of environmentally realistic pesticide mixtures using model ecosystems. In the present study, the effects of single and combined environmentally realistic concentrations of the herbicide terbuthylazine and the insecticide chlorpyrifos were evaluated using laboratory microcosms. Direct toxic effects of chlorpyrifos were noted on copepod nauplii and cladocerans and the recovery of the latter was likely related with the decrease observed in rotifer abundances. Terbuthylazine potentiated the effect of chlorpyrifos on feeding rates of Daphnia magna, presumably by triggering the transformation of chlorpyrifos to more toxic oxon-analogs. Possible food-web interactions resulting from multiple chemical (and other) stressors likely to be present in edge-of-field water bodies need to be further evaluated.
目前的研究使用实验室微宇宙，评估了除草剂特丁津和杀虫剂毒死蜱的单一和组合环境现实浓度对模型生态系统的影响。毒死蜱对桡足类无节幼体和枝角类动物产生了直接的毒性作用，后者的恢复可能与轮虫丰度的下降有关。特丁津增强了毒死蜱对大型蚤摄食率的影响，这可能是通过触发毒死蜱向更有毒的氧代类似物转化而产生的。需要进一步评估田间边缘水体中可能存在的多种化学（和其他）胁迫源的食物网相互作用。
