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首页> 美国卫生研究院文献>Heliyon >High-density element concentrations in fish from subtidal to hadal zones of the Pacific Ocean
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High-density element concentrations in fish from subtidal to hadal zones of the Pacific Ocean

机译：太平洋潮间带至海底带鱼类中的高密度元素浓度

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Anthropogenic use of high density, toxic elements results in marine pollution which is bio-accumulating throughout marine food webs. While there have been several studies in various locations analyzing such elements in fish, few have investigated patterns in these elements and their isotopes in terms of ocean depth, and none have studied the greatest depth zones. We used a flame atomic absorption spectrophotometer-hydride system and an inductively coupled plasma-mass spectrometer to determine concentrations of the high-density elements arsenic (As), cadmium (Cd), chromium (Cr), cobalt (Co), copper (Cu), lead (Pb), mercury (Hg), nickel (Ni), selenium (Se), plus the light-metal barium (Ba), in fish ranging from bathyal (1000 m in Monterey Bay) to upper hadal zones (6500–7626 m in the Kermadec and Mariana Trenches) in the Pacific Ocean. Five species of fish—including the Mariana Trench snailfish, the world's deepest known fish newly discovered—were analyzed for patterns in total element concentration, depth of occurrence, Se:Hg ratio, plus mercury isotopes in the deepest species. Co and As levels decreased with depth. In the Mariana Trench, Pb, Hg, Cd, and Cu were higher than in all other samples, and higher in those plus Ba than in the Kermadec Trench. The latter samples had far higher Ni and Cr levels than all others. Mercury relative isotope analysis showed no depth trends in the deepest species. Se:Hg showed a large molar excess of Se in bathyal flatfish species. These patterns indicate that exposures to pollutants differ greatly between habitats including trenches of similar depths.
机译：人为使用高密度有毒元素会导致海洋污染，这种污染正在整个海洋食物网中不断累积。尽管在不同位置进行了许多研究来分析鱼类中的此类元素，但很少有人研究这些元素及其同位素的海洋深度模式，也没有人研究最大深度区域。我们使用了火焰原子吸收分光光度计-氢化物系统和电感耦合等离子体质谱仪来确定高密度元素砷（As），镉（Cd），铬（Cr），钴（Co），铜（Cu鱼类，铅矿（在蒙特雷湾1000 m处）到上半干旱区（6500）中的铅，铅（Pb），汞（Hg），镍（Ni），硒（Se）以及轻金属钡（Ba）在太平洋的Kermadec和Mariana沟槽中为–7626 m。分析了五种鱼类-包括马里亚纳海沟nch鱼（Mariana Trench snailfish），这是新发现的世界上最深的已知鱼类-分析了最深鱼类中总元素浓度，发生深度，Se：Hg比以及汞同位素的模式。 Co和As水平随深度降低。在马里亚纳海沟中，铅，汞，镉和铜的含量均高于所有其他样品，而加钡中的铅含量均高于克马德克海沟。后者的样品中的镍和铬含量远高于其他所有样品。汞相对同位素分析显示最深物种中没有深度趋势。 Se：Hg在深海比目鱼物种中显示出大量的摩尔过量的Se。这些模式表明，不同生境（包括深度相似的trench沟）之间的污染物接触差异很大。

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