Current-use pesticides in seawater and their bioaccumulation in polar bear-ringed seal food chains of the Canadian Arctic
Current-use pesticides in seawater and their bioaccumulation in polar bear-ringed seal food chains of the Canadian Arctic
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DOI：
10.1002/etc.3427
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发表时间：
2016-07-01
影响因子：
4.1
通讯作者：
Duric, Mark
中科院分区：
文献类型：
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作者：
Morris, Adam D.;Muir, Derek C. G.;Duric, Mark
研究了加拿大北极3条海洋食物链中农药在海水中的分布及其营养动力学。各CUP在海水中溶相浓度最大范围为硫丹硫酸盐（小于方法检出限（MDL）至19pgL(-1)）； >达索（0.76-15pgL(-1)）； >毒死蜱（小于MDL至8.1pgL(-1)）； >五氯硝基苯（小于MDL至2.6pgL(-1)）； > -硫丹（0.20-2.3pgL(-1)）。生物积累因子（BAF，水呼吸生物）在浮游生物中最大，包括百菌清（对数BAF=7.4 +/- 7.1 L kg(-1)，平均+/-标准误差）、毒死蜱（对数BAF=6.9 +/- 6.7 L kg(-1)）和-硫丹（对数BAF=6.5 +/- 6.0 L kg(-1)）。在坎伯兰海峡（Nunvavut）的毛鳞：浮游生物营养关系中，达索的生物放大因子（BMF=13 +/- 5.0）最大，在巴罗海峡（Barrow）和雷海峡（Rae Strait）的北极熊海豹关系中，-硫丹的生物放大因子（BMF=16 +/- 4.9）和-硫丹的生物放大因子（BMF=9.3 +/- 2.8）最大。在食物网的变热部分（营养放大系数=1.4），硫丹硫酸盐的浓度表现出营养放大（随着营养水平的增加而增加），但在海洋哺乳动物食物网中，尽管存在一些特定营养水平的生物放大，但所有CUPs都发生了营养稀释。总之，这些观察结果很可能表明这些CUPs在哺乳动物中的代谢。环境科学学报（英文版）；2016;35(5):1695- 1697。(c) 2016 SETAC
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