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首页> 外文期刊>Archives of Environmental Contamination and Toxicology >Accumulation and Selective Maternal Transfer of Contaminants in the Turtle Trachemys scripta Associated with Coal Ash Deposition
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Accumulation and Selective Maternal Transfer of Contaminants in the Turtle Trachemys scripta Associated with Coal Ash Deposition

机译：与粉煤灰沉积有关的海龟气管脚本中污染物的积累和选择性母体转移

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摘要

Coal combustion wastes are enriched in a number of potentially toxic compounds and may pose risks to biota exposed to the wastes. Slider turtles (Trachemys scripta) are common inhabitants of coal ash settling basins in South Carolina, USA, where they feed on contaminated prey items and accumulate high levels of potentially toxic compounds in their tissues. Furthermore, female sliders sometimes nest in contaminated spill piles and thus may expose embryos to contaminated soils. We examined two potential pathways by which female T. scripta may influence the survivorship and quality of their offspring in a contaminated habitat: (1) nesting in contaminated soil and (2) maternal transfer of pollutants. Eggs were collected from turtles captured in coal ash–polluted or unpolluted sites; individual clutches were incubated in both ash-contaminated and uncontaminated soil in outdoor, artificial nests. Incubation in contaminated soil was associated with reduced embryo survivorship. Adult females from the polluted site accumulated high levels of As, Cd, Cr, and Se in their tissues, yet Se was the only element transferred maternally to hatchlings at relatively high levels. Hatchlings from polluted-site females exhibited reduced O2 consumption rates compared to hatchlings from reference sites. Relatively high levels of Se transferred to hatchlings by females at the ash-polluted site might contribute to the observed differences in hatchling physiology.
机译：燃煤废物中富含许多潜在的有毒化合物，可能会对暴露于废物中的生物群构成风险。滑龟（Trachemys scripta）是美国南卡罗来纳州粉煤灰沉积盆地的常见居民，它们以受污染的猎物为食，并在其组织中积聚高水平的潜在有毒化合物。此外，母滑块有时会嵌套在受污染的溢水堆中，因此可能会使胚胎暴露于受污染的土壤中。我们研究了两种可能的途径，雌性T. scripta可能会在受污染的栖息地中影响其生存和后代的质量：（1）在受污染的土壤中筑巢和（2）污染物的母体转移。从在粉煤灰污染或未污染的地方捕获的海龟中收集卵；在室外人工巢穴中，将单独的离合器在烟灰污染和未污染的土壤中孵育。在受污染的土壤中孵育与降低的胚胎存活率有关。来自受污染地点的成年雌性动物在其组织中积累了高水平的砷，镉，铬和硒，而硒是母体中以相对较高水平转移到孵化场的唯一元素。与参考地点的孵化相比，受污染地点的女性的孵化出的氧气消耗减少。雌性在灰烬污染部位将相对较高水平的硒转移到孵化场中，可能有助于观察到的孵化场生理差异。

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    R. D. Nagle; C. L. Rowe; J. D. Congdon;

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    University of Georgia Savannah River Ecology Laboratory Drawer E Aiken South Carolina 29802 USA;

    University of Georgia Savannah River Ecology Laboratory Drawer E Aiken South Carolina 29802 USA;

    University of Georgia Savannah River Ecology Laboratory Drawer E Aiken South Carolina 29802 USA;

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