Department of Biotechnology, Graduate School of Engineering, Osaka University, Suita, Japan.
Department of Biotechnology, Graduate School of Engineering, Osaka University, Suita, Japan.
Mar Environ Res. 2019 Mar;145:177-183. doi: 10.1016/j.marenvres.2019.02.007. Epub 2019 Feb 15.
This study focuses on the possibility that herbicide-exposed phytoplankton will cause sub-lethal effect on zooplankton. Atrazine, phytoplankton Raphidocelis subcapitata and zooplankton Daphnia magna were chosen as a model chemical and organisms. R. subcapitata was exposed to atrazine at 150 μg/L, harvested and fed to D. magna. While the mothers fed with atrazine-exposed phytoplankton did not show any abnormalities, they produced non-viable offspring. Number of non-viable offspring at the first clutch was high but the number was reduced at later stages and viable offspring was produced. This result indicates that phytoplankton exposed to sub-lethal dose of atrazine affects population dynamics of its predator, D. magna.
本研究关注的是暴露于除草剂的浮游植物是否会对浮游动物产生亚致死效应。莠去津、浮游植物新月菱形藻和浮游动物大型溞被选为模型化学物质和生物。新月菱形藻在 150μg/L 的莠去津中暴露，然后收获并喂养给大型溞。虽然摄食莠去津暴露的浮游植物的母亲没有表现出任何异常，但它们产生了无活力的后代。第一窝无活力后代的数量很高，但在后期阶段数量减少，产生了有活力的后代。这一结果表明，暴露于亚致死剂量莠去津的浮游植物会影响其捕食者大型溞的种群动态。
