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首页> 外文期刊>Marine Environmental Research >Biodynamic modelling of the accumulation of Ag, Cd and Zn by the deposit-feeding polychaete Nereis diversicolor: Inter-population variability and a generalised predictive model
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Biodynamic modelling of the accumulation of Ag, Cd and Zn by the deposit-feeding polychaete Nereis diversicolor: Inter-population variability and a generalised predictive model

机译：沉积物饲喂多毛NeNereis diversicolor对银，镉和锌积累的生物动力学模型：种群间变异性和广义预测模型

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摘要

Biodynamic parameters of the ragworm Nereis diversicolor from southern Spain and south England were experimentally derived to assess the inter-population variability of physiological parameters of the bioac-cumulation of Ag, Cd and Zn from water and sediment. Although there were some limited variations, these were not consistent with the local metal bioavailability nor with temperature changes. Incorporating the biodynamic parameters into a defined biodynamic model, confirmed that sediment is the predominant source of Cd and Zn accumulated by the worms, accounting in each case for 99% of the overall accumulated metals, whereas the contribution of dissolved Ag to the total accumulated by the worm increased from about 27 to about 53% with increasing dissolved Ag concentration. Standardised values of metal-specific parameters were chosen to generate a generalised model to be extended to N. diversicolor populations across a wide geographical range from western Europe to North Africa. According to the assumptions of this model, predicted steady state concentrations of Cd and Zn in N. diversicolor were overestimated, those of Ag underestimated, but still comparable to independent field measurements. We conclude that species-specific physiological metal bioaccumulation parameters are relatively constant over large geographical distances, and a single generalised biodynamic model does have potential to predict accumulated Ag, Cd and Zn concentrations in this polychaete from a single sediment metal concentration.
机译：通过实验推导了西班牙南部和英格兰南部的杂色夜蛾Nereis diversicolor的生物力学参数，以评估水和沉积物中Ag，Cd和Zn生物累积的生理参数在种群间的变异性。尽管存在一些有限的变化，但这些变化与局部金属的生物利用度或温度变化均不一致。将生物力学参数纳入已定义的生物力学模型中，证实了沉积物是蠕虫积累的Cd和Zn的主要来源，在每种情况下均占总积累金属的99％，而可溶性Ag占总积累金属的贡献。随着可溶性Ag浓度的增加，蠕虫从约27％增加到约53％。选择特定于金属的参数的标准值以生成通用模型，以扩展到从西欧到北非的广泛地理范围内的杂色猪笼草种群。根据该模型的假设，高估了杂色猪笼草中Cd和Zn的预测稳态浓度，而Ag的稳态浓度被低估了，但仍可与独立现场测量相媲美。我们得出的结论是，特定物种的生理金属生物累积参数在较大的地理距离内相对恒定，并且单个广义生物动力学模型确实具有从单个沉积物金属浓度预测该多壳动物中累积的Ag，Cd和Zn浓度的潜力。

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  • 来源
    《Marine Environmental Research》 |2010年第5期|p.363-373|共11页
  • 作者

    J. Kalman; B.D. Smith; I. Riba; J. Blasco; P.S. Rainbow;

  • 作者单位

    Department of Zoology, The Natural History Museum, Cromwell Rd, London SW7 5BD, United Kingdom;

    Department of Zoology, The Natural History Museum, Cromwell Rd, London SW7 5BD, United Kingdom;

    Instituto de Ciencias Marinas de Andaluda (CSIC}, Av. Republica Saharaui, 71510 Puerto Real, Cddiz, Spain;

    Instituto de Ciencias Marinas de Andaluda (CSIC}, Av. Republica Saharaui, 71510 Puerto Real, Cddiz, Spain;

    Department of Zoology, The Natural History Museum, Cromwell Rd, London SW7 5BD, United Kingdom;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    nereis diversicolor; cadmium; zinc; silver; biodynamic modelling; sediment;

    机译：杂色;镉;锌;银;生物动力学模拟;沉淀;

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