Metal contamination among endangered, threatened and protected marine vertebrates off south-eastern Australia
Metal contamination among endangered, threatened and protected marine vertebrates off south-eastern Australia
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DOI：
10.1016/j.ecolind.2019.105658
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发表时间：
2019-12-01
影响因子：
6.9
通讯作者：
Reichelt-Brushett, Amanda
中科院分区：
文献类型：
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作者：
Cagnazzi, Daniele;Broadhurst, Matt K.;Reichelt-Brushett, Amanda
澳大利亚新南威尔士州（NSW）沿海沃茨中许多必需和非必需微量元素的环境浓度是南半球任何地方报告的最低浓度之一。尽管如此，区域和洄游海洋生物群中各种污染物的浓度已超过现有的既定阈值，并可能产生各种不利的生物影响。我们量化了来自13个物种（海豚，鲨鱼，射线和硬骨鱼）的57个个体的24种微量元素的浓度，这些个体被部署在新南威尔士州北方29度的防泳刺网捕获。虽然肌肉中大多数元素的浓度都低于检测限，但超过50%的样本（主要是较大的鲨鱼）的汞浓度超过了可能破坏生物力学过程的阈值，而其他几个样本的砷和镉浓度升高到了以前证明会对其他物种造成负面影响的数值范围内，包括卵、胚胎或幼体的畸形。未来的研究是必要的，以量化更广泛的范围内观察到的污染物负荷和任何生理上的影响，野生种群。
Ambient concentrations of many essential and non-essential trace elements in coastal waters off New South Wales (NSW), Australia are among the lowest reported anywhere in the Southern Hemisphere. Nevertheless, concentrations of various contaminants in regional and migratory marine biota have been recorded above existing, established thresholds, and with possible implications for various negative biological effects. We quantified the concentrations of 24 trace elements in 57 individuals from 13 species (dolphins, sharks, rays and teleosts) caught in bather-protection gillnets deployed off northern NSW at 29 degrees S. While muscle concentrations of most elements were below detection limits, > 50% of specimens (mostly larger sharks) had Hg at concentrations exceeding thresholds that might damage biomechanical processes, while several others had As and Cd concentrations elevated to within the ranges of values previously demonstrated to cause negative effects among other species, including deformities among eggs, embryos or larvae. Future research is warranted to quantify the broader extent of the observed contaminant loads and any physiological impacts on wild populations.