期刊
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
卷 35, 期 7, 页码 1695-1707出版社
WILEY
DOI: 10.1002/etc.3427
关键词
Current-use pesticide; Marine mammal; Food chain; Trophic dilution; Bioaccumulation
资金
- Molson Foundation
- Northern Contaminants Program (Aboriginal Affairs and Northern Development Canada)
- Environment Canada (Chemical Management Plan)
The distribution of current-use pesticides (CUPs) in seawater and their trophodynamics were investigated in 3 Canadian Arctic marine food chains. The greatest ranges of dissolved-phase concentrations in seawater for each CUP were endosulfan sulfate (less than method detection limit (MDL) to 19pgL(-1)) > dacthal (0.76-15pgL(-1)) > chlorpyrifos (less than MDL to 8.1pgL(-1)) > pentachloronitrobenzene (less than MDL to 2.6pgL(-1)) > -endosulfan (0.20-2.3pgL(-1)). Bioaccumulation factors (BAFs, water-respiring organisms) were greatest in plankton, including chlorothalonil (log BAF=7.4 +/- 7.1 L kg(-1), mean +/- standard error), chlorpyrifos (log BAF=6.9 +/- 6.7 L kg(-1)), and -endosulfan (log BAF=6.5 +/- 6.0 L kg(-1)). The largest biomagnification factors (BMFs) were found for dacthal in the capelin:plankton trophic relationship (BMF=13 +/- 5.0) at Cumberland Sound (Nunvavut), and for -endosulfan (BMF=16 +/- 4.9) and -endosulfan (BMF=9.3 +/- 2.8) in the polar bearringed seal relationship at Barrow and Rae Strait (NU), respectively. Concentrations of endosulfan sulfate exhibited trophic magnification (increasing concentrations with increasing trophic level) in the poikilothermic portion of the food web (trophic magnification factor=1.4), but all of the CUPs underwent trophic dilution in the marine mammal food web, despite some trophic level-specific biomagnification. Together, these observations are most likely indicative of metabolism of these CUPs in mammals. Environ Toxicol Chem 2016;35:1695-1707. (c) 2016 SETAC
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