Incidence and impact of axial malformations in larval bullfrogs (Rana catesbeiana) developing in sites polluted by a coal-burning power plant
Incidence and impact of axial malformations in larval bullfrogs (Rana catesbeiana) developing in sites polluted by a coal-burning power plant
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DOI：
10.1002/etc.5620190412
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发表时间：
2000-04-01
影响因子：
4.1
通讯作者：
Ray, JK
中科院分区：
文献类型：
--
作者：
Hopkins, WA;Congdon, J;Ray, JK
两栖动物畸形近年来受到了科学界的广泛关注，但很少有研究表明环境污染与两栖动物幼虫畸形有关。我们记录了轴向畸形的发生率增加牛蛙幼虫（Rana catesbeiana）居住在污染的煤炭燃烧废物。在污染地点，18%和37%的幼虫表现出脊柱侧弯，而两个参考地点的幼虫表现出类似的畸形的比例分别为零和4%。与参考点的幼虫相比，来自污染最严重地点的幼虫具有明显更高的潜在有毒微量元素的组织浓度，包括As、Cd、Se、Cu、Cr和V。此外，来自污染最严重地点的畸形幼虫与来自同一地点的正常幼虫相比，游泳速度下降。我们假设，由煤燃烧产生的污染物的复杂混合物是负责高发生率的畸形和游泳性能的相关影响。
Amphibian malformations have recently received much attention from the scientific community, but Few studies have provided evidence linking environmental pollution to larval amphibian malformations in the field. We document an increased incidence of axial malformations in bullfrog larvae (Rana catesbeiana) inhabiting tao sites contaminated with coal combustion wastes. In the polluted sites, 18 and 37% of larvae exhibited lateral curvatures of the spine, whereas zero and 4% of larvae from two reference sites had similar malformations. Larvae from the most heavily polluted site had significantly higher tissue concentrations of potentially toxic trace elements, including As, Cd, Se, Cu, Cr, and V, compared with conspecifies from the reference sites. In addition, malformed larvae from the most contaminated site had decreased swimming speeds compared with those of normal larvae from the same site. We hypothesize that the complex mixture of contaminants produced by coal combustion is responsible for the high incidence of malformations and associated effects on swimming performance.