Elevated trace element concentrations in southern toads, Bufo terrestris, exposed to coal combustion waste
Elevated trace element concentrations in southern toads, Bufo terrestris, exposed to coal combustion waste
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DOI：
10.1007/s002449900383
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发表时间：
1998-08-01
影响因子：
4
通讯作者：
Congdon, JD
中科院分区：
文献类型：
--
作者：
Hopkins, WA;Mendonca, MT;Congdon, JD
最近的一些研究已经将两栖动物的发育，生理和行为异常与燃煤废物（煤灰）联系起来。然而，很少有研究确定了暴露于煤灰的两栖动物中的微量元素浓度。在目前的研究中，我们比较了20种微量元素在成年南方蟾蜍，蟾蜍terrestris，栖息在煤灰沉降盆地与蟾蜍没有暴露于燃烧废物（参考）的全身浓度。此外，我们记录了从参考地点移植到现场外壳在灰沉降盆7和12周的蟾蜍中微量元素的积累。砷，硒和钒的水平显着升高，蟾蜍捕获在灰污染的网站相比，蟾蜍从参考网站。所有这三个元素也显着升高蟾蜍暴露于受污染的栖息地只有7周。我们的研究表明，成年无尾两栖类可以生物积累特别高水平的硒，可能是有用的生物指示剂在农业和煤灰影响的栖息地。
A number of recent studies have linked developmental, physiological, and behavioral abnormalities in amphibians to coal combustion wastes (coal ash). Few studies, however, have determined trace element concentrations in amphibians exposed to coal ash. In the current study we compare total body concentrations of 20 trace elements in adult southern toads, Bufo terrestris, inhabiting coal ash settling basins with toads that were not exposed to the combustion wastes (reference). In addition, we document the accumulation of trace elements in toads transplanted from reference sites to field enclosures in an ash settling basin for 7 and 12 weeks. Arsenic, selenium, and vanadium levels were significantly elevated in toads captured at the ash-contaminated site in comparison to toads from the reference site. All three of these elements were also significantly elevated in toads exposed to the contaminated habitat for only 7 weeks. Our study suggests that adult anurans can bioaccumulate particularly high levels of selenium and may be useful bioindicators in agricultural and coal ash-impacted habitats.