Recent surveys of aquatic habitats suggest that organic wastewater contaminants (OWCs) may be common in aquatic ecosystems. However, relatively little is known about the impacts of OWCs on amphibians. We studied the lethal and sublethal effects of three OWCs (acetaminophen, caffeine, and triclosan) on American toad (Bufo americanus) tadpoles. High concentrations of triclosan increased activity, whereas acetaminophen had a significant effect on activity but there was no discernable pattern or trend with concentration. Caffeine did not affect activity in B. americanus tadpoles. None of the OWCs we studied had a significant effect on growth. Caffeine had no effect on survivorship. Higher concentrations of acetaminophen increased mortality. Intermediate concentrations of triclosan had a negative effect on survivorship, but the highest concentration apparently had a positive effect on survivorship. Our results suggest that there is variation in the toxicity of the three OWCs we studied.

中文翻译：

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三种有机废水污染物对美洲蟾蜍，美洲蟾蜍，t的影响。

最近对水生生境的调查表明，有机废水污染物（OWC）在水生生态系统中可能很常见。但是，关于OWC对两栖动物的影响知之甚少。我们研究了三种OWC（对乙酰氨基酚，咖啡因和三氯生）对美国蟾蜍（Bufo americanus）t的致死和亚致死作用。高浓度的三氯生增加了活性，而对乙酰氨基酚对活性有显着影响，但浓度没有明显的规律或趋势。咖啡因不影响美洲双歧t的活动。我们研究的OWC均未对生长产生重大影响。咖啡因对存活率没有影响。较高浓度的对乙酰氨基酚会增加死亡率。中等浓度的三氯生对存活率有负面影响，但最高浓度显然对存活率有积极影响。我们的结果表明，我们研究的三种OWC的毒性存在差异。