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首页> 外文期刊>Marine ecology progress series >Distribution of a tetrabrominated diphenyl ether and its metabolites in soft-bottom sediment and macrofauna species
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Distribution of a tetrabrominated diphenyl ether and its metabolites in soft-bottom sediment and macrofauna species

机译：四溴联苯醚及其代谢物在软底沉积物和大型动物区系中的分布

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摘要

Sediment spiked with ~(14)C-2,2′, 4,4′-tetrabrominated diphenyl ether (BDE-47) was added as a single pulse, at a low or a high concentration, to intact soft-bottom sediments in a box-cosm system. The vertical distribution of the pollutant and the bioaccumulation in 39 different taxa of macro-fauna were analysed after 10, 20 and 29 wk exposure. Throughout the experimental period, 90% of the recovered BDE-47-derived radioactivity in the sediment was found within the upper 5 cm. The BSAF (biota-sediment accumulation factor) in the different taxa after 29 wk exposure varied between 0.4 and 16.3. The correlation between bioaccumulation and lipid content of all individual specimens in each box-cosm was significantly positive and explained between 11 and 64 % of the variation. When the fauna was divided into groups with different feeding strategies, it was found that the mean BSAF was significantly higher for the surface deposit-feeders than for the suspension-feeders, subsurface feeders and the predators. The difference increased with time and was larger after 29 wk exposure than after 10 wk. We also tested whether there was a correlation between ~(15)N enrichment, i.e. trophic position, in the analysed species and bioaccumulation, but no such correlation was found. Water-soluble metabolites of BDE-47 were detected in 15 of the 39 macrofaunal species. There was no observable correlation between the presence of metabolites in the macrofauna and bioaccumulation of the pollutant.
机译：以低或高浓度单脉冲添加掺有〜（14）C-2,2'，4,4'-四溴联苯醚（BDE-47）的沉积物，以形成完整的软底沉积物。盒子宇宙系统。在10、20和29周暴露后，分析了39种不同的大型动物群中污染物的垂直分布和生物富集。在整个实验期间，发现沉积物中90％的BDE-47回收的放射性来自上部5 cm。 29 wk暴露后不同分类单元中的BSAF（生物沉积物累积因子）在0.4和16.3之间变化。每个盒子宇宙中所有个体标本的生物蓄积与脂质含量之间的相关性呈显着正相关，并解释了11％至64％的变异。当将动物区分开为具有不同饲养策略的组时，发现表面沉积物饲养者的平均BSAF显着高于悬浮饲养者，地下饲养者和捕食者。差异随时间增加，暴露29周后大于10周后。我们还测试了所分析物种中〜（15）N富集（即营养位置）与生物富集之间是否存在相关性，但未发现此类相关性。在39种大型动物中的15种中检测到BDE-47的水溶性代谢物。大型动物中代谢产物的存在与污染物的生物蓄积之间没有可观察到的相关性。

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