Effects of an Atrazine, Metolachlor and Fipronil Mixture on Hyalella azteca (Saussure) in a Modified Backwater Wetland

被引：7

作者：

Lizotte, Richard E., Jr. ^{[1
]}

Knight, Scott S. ^{[1
]}

Shields, F. Douglas, Jr. ^{[1
]}

Bryant, Charles T. ^{[1
]}

机构：

[1] USDA ARS, Natl Sedimentat Lab, Oxford, MS 38655 USA

来源：

BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY | 2009年 / 83卷 / 06期

关键词：

Floodplain wetland; Pesticide mixture; TOXICITY; FATE;

D O I：

10.1007/s00128-009-9850-1

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

We examined the toxicity mitigation efficiency of a hydrologically modified backwater wetland amended with a pesticide mixture of atrazine, metolachlor, and fipronil, using 96 h survival bioassays with Hyalella azteca. Significant H. azteca 96 h mortality occurred within the first 2 h of amendment at the upstream amendment site but not at any time at the downstream site. H. azteca survival varied spatially and temporally in conjunction with measured pesticide mixture concentrations. Hyalella azteca 96 h survival pesticide mixture effects concentrations ranges were 10.214-11.997, 5.822-6.658, 0.650-0.817, and 0.030-0.048 mu g L-1 for atrazine, metolachlor, fipronil, and fipronil-sulfone, respectively.

引用

页码：836 / 840

页数：5

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