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首页> 外文期刊>Environmental Science & Technology >Mercury Concentrations in Salmonids from Western U.S. National Parks and Relationships with Age and Macrophage Aggregates
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Mercury Concentrations in Salmonids from Western U.S. National Parks and Relationships with Age and Macrophage Aggregates

机译：美国西部国家公园鲑鱼中的汞浓度及其与年龄和巨噬细胞聚集体的关系

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摘要

Mercury accumulation in aquatic foodwebs and its effects on aquatic biota are of growing concern both for the health of the fish and the piscivores that prey upon them. This is of particular concern for western U.S. National Parks because it is known that mountainous and Arctic areas are sinks for some contaminants. The Western Airborne Contaminants Assessment Project seeks, in part, to ascertain mercury concentrations and evaluate effects of contaminants on biota in 14 lakes from 8 National Parks or Preserves. In this paper we report that mercury has accumulated to concentrations in trout that may negatively impact some piscivorous wildlife, indicating potential terrestrial ecosystem effects. Additionally, we show that mercury concentrations increase with age in 4 species of trout, providing evidence of bioaccumulation. Finally, we demonstrate that mercury is associated with tissue damage in the kidney and spleen, as indicated by increases in macrophage aggregates. This finding suggests that mercury, and possibly other contaminants, are negatively affecting the troutthat inhabitthese remote and protected ecosystems. Our results indicate that mercury is indeed a concern for the U.S. National Parks, from an organismic and potentially an ecosystem perspective.
机译：汞在水生食物网中的蓄积及其对水生生物的影响日益引起人们对鱼类和捕食它们的食肉动物健康的关注。这是美国西部国家公园特别要关注的问题，因为众所周知，山区和北极地区是某些污染物的汇入地。西方空气污染物评估项目部分旨在确定汞浓度并评估8个国家公园或自然保护区14个湖泊中污染物对生物区系的影响。在本文中，我们报告说，汞在鳟鱼中的浓度已累积到一定浓度，可能会对某些食鱼性野生生物产生负面影响，表明潜在的陆地生态系统影响。此外，我们显示出鳟鱼4种中汞的浓度随年龄增加而增加，提供了生物蓄积的证据。最后，我们证明汞与肾脏和脾脏的组织损伤有关，如巨噬细胞聚集体增加所表明的。这一发现表明汞以及可能的其他污染物正在对居住在偏远和受保护的生态系统中的鳟鱼产生负面影响。我们的结果表明，从有机的和潜在的生态系统的角度来看，汞确实是美国国家公园关注的问题。

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