期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 106, 期 -, 页码 213-219出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2014.04.027
关键词
Toxicity bioassay; Eco-toxicity; Database study; Probabilistic risk assessment
资金
- China National Natural Science Foundation Committee [41271487]
- Program of International ST Cooperation [2012DFA91150]
- China Scholarship Council
- Cotton Catchment Communities CRC, Australia
A probabilistic risk assessment of the selected herbicides (diuron and prometryn) in the Gwydir River catchment was conducted, with the input of the EC50 values derived from both literature and a novel bioassay. Laboratory test based on growth of algae exposed to herbicides assayed with a microplate reader was used to examine the toxicity of diuron and prometryn on the growth of Chlorella vulgaris. Both herbicides showed concentration dependent toxicity in inhibiting the growth of Chlorella during the exposure period of 18-72 h. Diuron caused more toxicity as judged by growth rates than prometryn. Thalaba Creek at Merrywinebone was identified as the 'hotspot' for diuron and prometryn risk in the Gwydir catchment. The use of microplate assays coupled with probabilistic risk assessment is recommended for rapid assessment of ecotoxicity of indigenous species, allowing identification of locations in river catchments requiring environmental management. (C) 2014 Elsevier Inc. All rights reserved.
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