The effects of parasite exposure on mortality from aquatic contaminants, carbaryl and elevated salinity, in a freshwater crustacean

The effects of parasite exposure on mortality from aquatic contaminants, carbaryl and elevated salinity, in a freshwater crustacean
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淡水甲壳动物中寄生虫暴露对水生污染物、西维因和盐度升高造成的死亡率的影响

DOI:
10.1093/plankt/fbaa023
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发表时间:
2020
影响因子:
2.1
通讯作者:
Searle, Catherine L
Searle, Catherine L
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Ilmain, Juliana K;Searle, Catherine L

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淡水污染是一个主要的全球问题。确定污染物对淡水生物影响的常见方法包括对其他健康生物进行短期实验室实验。然而,在自然系统中,生物体通常暴露在寄生虫中,这可能会改变它们在水污染中生存的能力。我们使用一种淡水甲壳动物(牙形蚤)来量化寄生虫暴露对两种常见淡水污染物(盐度升高[氯化钠]和西维因)造成的死亡率的影响。在我们的盐度试验中,寄生虫暴露和盐度升高都以相加的方式降低了存活率。在我们的西维因试验中,暴露于西维因降低了存活率,我们发现西维因和寄生虫之间存在不到相加(即拮抗)的相互作用;在对照(没有西维因)处理中,寄生虫只降低了存活率。我们的结果表明,寄生虫和污染物可以以相加或小于相加的方式共同影响水生生物的死亡率。
Freshwater pollution is a major global concern. Common methods for determining the effects of contaminants on freshwater organisms involve short-term laboratory experiments with otherwise healthy organisms. However, in natural systems, organisms are commonly exposed to parasites, which could alter their ability to survive exposure to aquatic contamination. We used a freshwater crustacean (Daphnia dentifera) to quantify the effects of parasite exposure on mortality from two common freshwater contaminants (elevated salinity [NaCl] and carbaryl). In our salinity trial, both parasite exposure and elevated salinity reduced survival in an additive manner. In our carbaryl trial, exposure to carbaryl reduced survival and we found a less-than-additive (i.e. antagonistic) interaction between carbaryl and the parasite; the parasite only reduced survival in the control (no carbaryl) treatments. Our results demonstrate that parasites and contaminants can jointly affect mortality in aquatic organisms in an additive or less-than-additive manner.
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发表时间: 1994
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