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首页> 外文期刊>Science of the total environment >Mammalian hair as an accumulative bioindicator of metal bioavailability in Australian terrestrial environments
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Mammalian hair as an accumulative bioindicator of metal bioavailability in Australian terrestrial environments

机译：哺乳动物的头发是澳大利亚陆地环境中金属生物利用度的累积生物指示剂

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摘要

The current study represents the first investigation of the suitability of marsupial and eutherian mammalian hair as indicator tissue for metal exposure and accumulation within contaminated Australian terrestrial ecosystems. A soil metal contamination gradient was established across 22 sites at increasing distances from a decommissioned Lead/Zinc smelter in NSW, Australia. Within each site, soil and small mammal populations were sampled. An Australian native marsupial, the insectivorous Brown Antechinus, Antechinus stuartii: Dasyuridae, and introduced rodents, the omnivorous Brown or Norway Rat, Rattus norvegicus: Muridae and the Black Rat, Rattus rattus: Muridae were assessed for hair concentrations of Cadmium (Cd), Copper (Cu), Lead (Pb) and Zinc (Zn). Metals in soil were most elevated at sites within close proximity to the smelter, with soil metal concentrations decreasing with distance from the smelter. The non-essential metals Pb and Cd were accumulated in hair, both metals exhibiting positive linear relationships with environmental exposure (soil metal concentrations). When the variables of weight and snout-vent length were considered, no further contribution in terms of explaining the variability in hair Cd or Pb was observed for all species examined. The essential metals Cu and Zn were regulated in hair, remaining similar across the metal contamination gradient. A significant negative correlation between snout-vent length and hair Cu concentration was found for the Brown Rat; greater hair Cu concentrations were found in smaller individuals of this species. Accumulation of Pb to hair was similar among species while concentrations of Cd in Brown Rat hair were higher than both Black Rat and Brown Antechinus hair. As each of the three aforementioned species exhibit similar bioaccumulation relationships for Pb, we suggest that sampling hair from introduced rodents (pest species) may provide a suitable proxy for the assessment of Pb bioavailability for a range of small mammals within Australian urban remnants.
机译：当前的研究是对有袋和有真人的哺乳动物毛作为在受污染的澳大利亚陆地生态系统中金属暴露和积累的指示组织的适用性的首次调查。在距澳大利亚新南威尔士州退役的铅/锌冶炼厂越来越远的22个地点，建立了土壤金属污染梯度。在每个站点内，对土壤和小型哺乳动物种群进行了采样。澳大利亚本土有袋动物，食虫性棕An牛，Antechinus stuartii：Dasyuridae，并引入了啮齿动物，杂食性棕鼠或挪威鼠，褐家鼠：鼠科和黑鼠，褐家鼠：鼠科：鼠科对镉（Cd）的头发浓度进行了评估，铜（Cu），铅（Pb）和锌（Zn）。在靠近冶炼厂的位置，土壤中的金属含量最高，土壤金属浓度随距冶炼厂的距离而降低。非必需金属Pb和Cd积累在头发中，两种金属均与环境暴露（土壤金属浓度）呈正线性关系。当考虑体重和口鼻部长度的变量时，对于所检查的所有物种，在解释头发Cd或Pb的变异性方面都没有进一步的贡献。头发中的必需金属Cu和Zn被调节，在整个金属污染梯度中保持相似。布朗大鼠的口鼻孔长度与头发中的铜浓度之间存在显着的负相关。在该物种的较小个体中发现较高的头发铜浓度。物种中铅在头发中的累积量相似，而棕鼠头发中的镉含量高于黑鼠和棕褐色的头发。由于上述三个物种中的每一个都表现出相似的Pb生物富集关系，因此我们建议从引入的啮齿动物（害虫物种）中取样头发，可以为评估澳大利亚城市残余物中一系列小型哺乳动物的Pb生物利用度提供合适的代理。

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  • 来源
    《Science of the total environment》 |2009年第11期|3588-3596|共9页
  • 作者

    Christopher M. McLean; Claudia E. Koller; John C. Rodger; Geoff R. MacFarlane;

  • 作者单位

    Ecology and Ecotoxicology Laboratory, School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW Australia Centre for the Risk Management of Bushfires, Institute for Conservation Biology and Law, University of Wollongong, Wollongong, NSW, Australia;

    Ecology and Ecotoxicology Laboratory, School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW Australia;

    Marsupial Research Laboratory, School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW Australia;

    Ecology and Ecotoxicology Laboratory, School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW Australia;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    bioindicator; hair; heavy metals; marsupial; mammal;

    机译：生物指示剂头发;重金属;有袋动物哺乳动物;

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