期刊
ENVIRONMENTAL POLLUTION
卷 157, 期 1, 页码 110-116出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2008.07.023
关键词
Insecticides; Pyrethroids; Bifenthrin; Hyalella azteca; Sediment
资金
- Glasscock Family Foundation for Environmental Studies
Despite heavy insecticide usage in urban areas, only a few studies have investigated the impact of current-use insecticides on benthic invertebrates in urban streams. The objective of this study was to measure the presence and concentration of current-use pesticides in sediments of residential streams in central Texas. Additionally, toxicity of these sediments to Hyalella azteca was evaluated. Sediment samples were collected from several sites in urban streams over the course of a year, of which, 66% had greater than one toxic unit (TU) of insecticide. Bifenthrin was the greatest contributor accounting for 65% of the TUs, and sediment toxicity to H. azteca correlated with the magnitude of total insecticides and bifenthrin TUs. The results of this study further raise concerns over the environmental consequences posed by many current-use insecticides, especially pyrethroids, in urban settings. (C) 2008 Elsevier Ltd. All rights reserved.
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