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首页> 外文期刊>Estuarine Coastal and Shelf Science >Influence of combined changes in salinity and copper modulation on growth and copper uptake in the tropical green macroalga Ulva reticulata
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Influence of combined changes in salinity and copper modulation on growth and copper uptake in the tropical green macroalga Ulva reticulata

机译：盐度和铜调制组合变化对热带绿巨藻石va生长和铜吸收的影响

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摘要

The influence of salinity on growth and Cu uptake in the green macroalga Ulva reticulata collected frc the intertidal area in the Western Indian Ocean was studied under controlled laboratory conditic Exposure concentrations ranged from 5 to 500 μg Cu I~(-1) at five salinities (ranging 20-40). The ace mulation of Cu increased with decreasing salinity, so that the uptake at 500 μg Cu I~(-1) was approximatf 2.7, 2.4 and 2.0 times higher at salinities of 20, 25, and 30 respectively, than uptake at salinity of 35, e-with uptake being lowest at salinity of 40. Ulva maintained a positive growth rate over the whole salir< range (20-40), with highest rates at salinity of 35. When exposing to Cu at low salinities (20 and 25), t growth rate of Ulva was strongly inhibited suggesting an increase in toxicity of Cu with decreas' salinity. EC50 and NOEC increased with increase in salinity, implying a reduced Cu toxicity at hi salinities. It was concluded that salinity needs to be considered when using macroalgae, such as reticulata, as a bioindicator of heavy metals in areas with heavy rainfall, underground fresh wa intrusion or in estuaries, as they might accumulate more metals and be more negatively affected.
机译：在受控的实验室条件下，研究了盐度对西印度洋潮间带绿色大藻网状藻生长和铜吸收的影响。在五个盐度下，暴露浓度范围为5至500μgCu I〜（-1）（ 20-40）。 Cu的模拟量随盐度的降低而增加，因此，在盐度为20、25和30时，Cu I〜（-1）在500μgCu I〜（-1）处的吸收分别约为盐分为35时的2.7、2.4和2.0倍。 ，在盐度为40时，电子吸收最低。在整个盐度范围内（20-40），Ulva都保持正增长，在盐度为35时增长率最高。在低盐度（20和25）下暴露于铜时，Ulva的t生长速率被强烈抑制，表明Cu的毒性随着盐度的降低而增加。 EC50和NOEC随着盐度的增加而增加，这意味着高盐度时Cu毒性降低。得出的结论是，在降雨多，地下淡水入侵或河口地区使用网藻等大型藻类作为重金属的生物指标时，需要考虑盐度，因为它们可能会积累更多的金属，并受到更大的负面影响。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2009年第3期|326-330|共5页
  • 作者

    Florence Mamboya; Thomas J. Lyimo; Tommy Landberg; Mats Bjoerk;

  • 作者单位

    Department of Science and Laboratory Technology, Dar es Salaam Institute of Technology, P.O. Box 2958, Dar es Salaam, Tanzania;

    Department of Molecular Biology and Biotechnology, University of Dar es Salaam, P. 0. Box 35179, Dar es Salaam, Tanzania;

    Department of Botany, Stockholm University, S 106 91 Stockholm, Sweden;

    Department of Botany, Stockholm University, S 106 91 Stockholm, Sweden;

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  • 正文语种 eng
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  • 关键词

    ulva reticulata; copper; salinity; uptake; growth;

    机译：网眼铜;盐度;摄取成长;

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