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首页> 外文期刊>Estuarine Coastal and Shelf Science >Nereis diversicolor and copper contamination effect on the erosion of cohesive sediments: A flume experiment
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Nereis diversicolor and copper contamination effect on the erosion of cohesive sediments: A flume experiment

机译：杂色猪笼草和铜污染对粘性沉积物侵蚀的影响：水槽实验

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摘要

The effect of bioturbation on the erodability of natural and manipulated copper spiked sediments (3 μmol Cu g~(-1) dw) was investigated using sediments collected in the Tagus estuary and Nereis diversicolor (900 ind m~(-2)). The input of particulars matter and Cu into the water column as a result of erosion was quantified in an annular flume at 7 shear velocities (1-13 cm s~(-1)). The biogeochemical characteristics of the sediment were analysed in depth down to 8 cm. Cu contamination elicited lower levels of eroded matter and lower shear strength profiles. Eroded matter and sediment shear strength values were higher (up to 1.7 kg m~(-2)) in the presence of N. diversicolor, whose effect was less pronounced under contamination. Sediment erodability was not only related to hydrodynamics but was highly affected by the biogeochemical characteristics and contamination of the sediments.
机译：利用塔霍河口和杂色Nereis diversicolor（900 ind m〜（-2））收集的沉积物，研究了生物扰动对天然和人工处理的铜尖刺沉积物（3μmolCu g〜（-1）dw）的腐蚀能力的影响。在7个剪切速度（1-13 cm s〜（-1））的环形水槽中，定量分析了由于侵蚀而导致的特殊物质和Cu的输入。对沉积物的生物地球化学特征进行了深达8 cm的分析。铜污染引起较低水平的侵蚀物和较低的剪切强度曲线。在杂色猪笼草的存在下，侵蚀物和沉积物的剪切强度值较高（最高为1.7 kg m〜（-2）），在污染下其影响较小。沉积物的侵蚀性不仅与水动力有关，而且还受到生物地球化学特征和沉积物污染的高度影响。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2009年第3期|443-451|共9页
  • 作者

    S. Fernandes; P. Sobral; F. Alcantara;

  • 作者单位

    IMAR - Institute do Mar, Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, Campus da Caparica, 2829-516 Caparica, Portugal;

    IMAR - Institute do Mar, Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, Campus da Caparica, 2829-516 Caparica, Portugal;

    Departamento de Biologia, Universidade de Aveiro, Campus Universitario de Santiago, 3810-193 Aveiro, Portugal;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    bioturbation; shear strength; erosion; copper; flumes; nereis diversicolor;

    机译：生物扰动剪切强度侵蚀;铜;水槽杂色;

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