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Sediment and Biota Trace Element Distribution in StreamsDisturbed by Upland Industrial Activity

机译:泥沙和Biota痕量元素分布在溪流中由高地工业活动扰乱

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Extensive industrial areas in headwater stream watersheds can severely impact the physical condition of streams and introduce contaminants. We compared 3 streams that received stormwater runoff and industrial effluents from industrial complexes to 2 reference streams. Reference streams provide a benchmark of comparison of geomorphic form and stability in coastal plain, sandy-bottomed streams as well as concentrations of trace elements in sediment and biota in the absence of industrial disturbance. We used crayfish (Cambarus latimanus, Procambarus raneyi, Procambarus acutus) and crane fly larvae (Tipula) as biomonitors of 15 trace elements entering aquatic food webs. Streams with industrial areas were more scoured, deeply incised, and less stable. Sediment organic matter content broadly correlated to trace element accumulation, but fine sediments and organic matter were scoured from the bottoms of disturbed streams. Trace element concentrations were higher in depositional zones than runs within all streams. Despite contaminant sources in the headwaters, trace element concentrations were generally not elevated in sediments of the eroded streams. However, element concentrations were frequently elevated in biota from these streams with taxonomic differences in accumulation amplified. In eroded, sand-bottomed coastal plain streams with unstable sediments, single snapshots of sediment trace element concentrations did not characterize well bioavailable trace elements. Biota that integrated exposures over time and space within their home ranges better detected bioavailable contaminants than sediment. Environ Toxicol Chem 2019;38:115-131. (c) 2018 SETAC
机译:下游流域的广泛工业区可以严重影响流的物理状况并引入污染物。我们将3个溪流与工业综合体的雨水径流和工业污水相加至2个参考流。参考流提供了沿海平原,沙质底部流的几何形状和稳定性的比较基准以及沉积物和生物遗留的微量元素的浓度在没有产业障碍的情况下。我们使用小龙虾(Cambarus Latimanus,Procambarus Raneyi,Procambarus Acutus)和起重机飞幼虫(Tipula)作为15种微量元素进入水生食品网的生物监作者。与工业区的溪流更加滋润,深刻切开,稳定。沉积物有机物质含量与痕量元素积累宽相关,但从干扰物流的底部彻底填充细粒和有机物质。追踪区域的痕量元素浓度高于所有流内的延伸。尽管处于侵蚀的流的沉积物中,尽管呈污染物来源,但痕量元素浓度通常不会升高。然而,元素浓度通常在Biota中升高来自这些流的分类分类差异扩增。在侵蚀的沉积物沉积物中腐烂的沿海普通溪流,沉积物的单一快照痕量元素浓度没有表征良好的生物可利用的微量元素。 Biota在他们的家庭内综合曝光和空间范围更好地检测到生物可利用的污染物而不是沉积物。环境毒素科学2019; 38:115-131。 (c)2018 Setac

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