Department of Aquatic Ecology and Ecotoxicology, Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands.
Department of Chemistry and Biology, Institute for Environmental Studies (IVM), VU University, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands.
Environ Pollut. 2014 Apr;187:106-11. doi: 10.1016/j.envpol.2013.12.019. Epub 2014 Jan 22.
Due to their specific effect on photosynthesis, herbicides pose a potential threat to coastal and estuarine microalgae. However, comprehensive understanding of the hazard and risk of these contaminants is currently lacking. Therefore the aim of the present study was to investigate the toxic effects of four ubiquitous herbicides (atrazine, diuron, Irgarol(®)1051 and isoproturon) and herbicide mixtures on marine microalgae. Using a Pulse Amplitude Modulation (PAM) fluorometry based bioassay we demonstrated a clear species and herbicide specific toxicity and showed that the current environmental legislation does not protect algae sufficiently against diuron and isoproturon. Although a low actual risk of herbicides in the field was demonstrated, monitoring data revealed that concentrations occasionally reach potential effect levels. Hence it cannot be excluded that herbicides contribute to observed changes in phytoplankton species composition in coastal waters, but this is likely to occur only occasionally.
由于其对光合作用的特殊影响，除草剂对沿海和河口微藻构成了潜在威胁。然而，目前人们对这些污染物的危害和风险还缺乏全面的了解。因此，本研究旨在调查四种普遍存在的除草剂（莠去津、敌草隆、IRGAROL®1051 和异丙隆）和除草剂混合物对海洋微藻的毒性影响。本研究采用基于脉冲幅度调制（PAM）荧光法的生物测定法，证明了不同物种和除草剂的特异性毒性，并表明目前的环境法规不能充分保护藻类免受敌草隆和异丙隆的侵害。尽管现场除草剂的实际风险较低，但监测数据显示，浓度偶尔会达到潜在影响水平。因此，不能排除除草剂对沿海水域浮游植物物种组成的变化有贡献，但这种情况可能只是偶尔发生。
