期刊
CHEMOSPHERE
卷 81, 期 7, 页码 837-843出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2010.08.014
关键词
Epilithic biofilms; Diuron; Microcosms; POCIS; Biotransformation
资金
- Conseil General 64
The effect of realistic environmental contamination of diuron on natural epilithic biofilms dwelling bacterial communities and their transformation capacities were investigated by using microcosm experiments Cobbles carrying biofilms from two sites (Pau and Lacq) located in areas of contrasting pesticide use (urban and agricultural) on the Gave de Pau river (South-West France) were analysed The water of the upstream site Pau was characterised by fewer pesticides than the water of Lacq whereas concentrations were higher at Pau The sampled cobbles were exposed to diuron (10 mu g L-1) in microcosms After 3 weeks of exposure pesticides were analysed and bacterial community structures were assessed with terminal-restriction fragment length polymorphism (T RFLP) Diuron was biotransformed during contact with biofilms revealing that these communities contribute to the production of DCPMU (1-(3 4 dichlorophenyl)-3-methylurea) and DCPU metabolites (1-(3 4 dichlorophenyl) urea) in the river ecosystems Bacterial communities from the most contaminated site appeared to be more resistant to diuron exposure Correlation analyses combining chemical data with molecular fingerprinting showed that past in situ exposure drove the response of the bacterial communities (C) 2010 Elsevier Ltd All rights reserved
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据